About
R. Keone Ah San is a certified Physician Assistant. He has more than a decade of clinical experience, with the majority of those years working for one of the busiest Endocrine/Renal clinics in Southern California. As a result, he has extensive experience in seeing Internal Medicine, Endocrine, and Renal patients.
Growing up in Hawaii, he developed an early interest in sports and nutrition. This helped influence his decision to earn a Bachelor’s Degree in Exercise and Movement Science from the University of Oregon, Eugene. Remembering how his childhood pediatrician could always make him feel better, he went on to earn a Masters in Medical Science from the Department of Family Medicine/Physician Assistant Program at Emory School of Medicine in Decatur, Georgia. Today, he enjoys being able to play his part in helping to improve the quality of his patients’ lives and, just like his childhood pediatrician did for him, make them feel better.
Languages
English
Provider Specialty
Physician Assistant, Primary Care
Areas of Care
Education
Allied Health Education
Emory University School of Medicine - PA
2000
Locations & Affiliations
Locations
MemorialCare Medical Group - Rancho Santa Margarita
29472 Avenida de las Banderas
Rancho Santa Margarita, CA
Office: 877-696-3622
Affiliations
Insurance
Please consult your health care provider or health plan for the most accurate information about your health plan’s coverage of a particular health care service offered at a MemorialCare facility. Learn more about our Accepted Health Plans.
Patient Reviews
4.9 out of 5
(500 Ratings)
(500 Ratings)
Oct 30, 2026
Wanda B.
Oct 29, 2026
Irene T.
Oct 28, 2026
Cheryl G.
He is helpful and explains as well as answers my concerns.
Oct 28, 2026
Adrien K.
Ryan K Ah San attentively listened to my concerns. He wrote a prescription & gave me some advice. He was very helpful!
Oct 28, 2026
Jose L.
An excellent doctor, highly professional, accurate in his diagnoses, and truly compassionate. His knowledge, dedication, and commitment to his patients are evident. It gives you great confidence to know you are in the hands of such a skilled and knowledgeable professional. Highly recommended! Thank you for your outstanding work! ???? ????????
Oct 27, 2026
Darrell G.
Oct 27, 2026
Randall O.
Oct 26, 2026
Patricia B.
Oct 26, 2026
Kandace K.
Oct 23, 2026
Kuuipo P.
Oct 23, 2026
Christian T.
Oct 22, 2026
Leticia R.
I was very pleased with my visit from the minute I walked in the building to seeing Doctor Ah San. Everyone did a great job. Dr. Ah San has great communication with his patients listens to us.
Oct 22, 2026
Joe D.
Oct 21, 2026
Karen K.
Oct 21, 2026
Marta R.
Oct 21, 2026
Saul M.
My husband and me are very happy to be under his care
Oct 21, 2026
Anonymous
Very good knowledge about my systems.
Oct 20, 2026
Georgina T.
Oct 20, 2026
Denise C.
Oct 17, 2026
Mina F.
He was so carful and lots of attention.
Oct 16, 2026
Rodrigo C.
Oct 16, 2026
Kandi G.
Oct 15, 2026
Dan P.
I thought he did a great job of both listening and advising. Seemed knowledgeable and confident
Oct 15, 2026
Anonymous
First VisitHe did a great job of both listening and advising. He seemed knowledgeable and confident.
Oct 14, 2026
Matthew B.
Very good listener and he was on time
Oct 14, 2026
Karen B.
I think Mr. Ah San is very thorough, knowledgable and takes the time to listen to me. Highly recommend!
Oct 12, 2026
Ryan G.
Oct 12, 2026
Jason N.
Very knowledgeable and personable.
Oct 9, 2026
Robert L.
Oct 8, 2026
Linda B.
Oct 8, 2026
Stephen M.
Very good with patients, listens and has good recommendations
Oct 7, 2026
Lawrence G.
I think Keone takes so much time with his patients. We have been going to him for a long time and always shows such an interest in our care.
Oct 6, 2026
Kurt K.
He is thorough and always prepared.
Oct 6, 2026
Taylor B.
Oct 6, 2026
Gloria L.
Mr Ah San is very tentative and thorough. Takes the time to listen to you. Office is great! Newly renovated and welcoming. Highly recommend this office and Mr. Ah San!
Oct 4, 2026
Patricia O.
Very thorough and knowledgeable. Provided the best service and referred to other providers I needed. Took the time to evaluate my moles and teeth and ears.
Oct 1, 2026
Liang L.
Sep 30, 2026
Zoria R.
Very thorough, answered all questions.
Sep 29, 2026
Tyrone P.
Sep 29, 2026
Margret C.
Ryan is friendly, professional, caring and helpful! He never made me feel rushed, he was very patient!
Sep 28, 2026
Richard Z.
Sep 24, 2026
Katherine H.
Sep 24, 2026
Mirna Q.
Sep 23, 2026
Kelly B.
He is amazing! Always thorough! Very caring! I couldn’t give him a higher rating!!!
Sep 21, 2026
Nancy C.
Always knowledgeable about any drug and their usage and side effects, very caring, thorough and always asks the right questions. He’s fantastic. Would always want him as my primary care physician.
Sep 21, 2026
Athanasia H.
He is always very informative.
Sep 16, 2026
Roberto V.
Sep 16, 2026
Janet L.
Ryan K Ah San is very knowledgeable and professional.
Sep 16, 2026
Tiara S.
Very attentive and listened to what I had to say. I would recommend him to everyone. He took time and explained everything so I could understand.
Sep 11, 2026
Gail R.
I really like seeing him. He is very thorough and on top of things, provides good recommendations, and is very efficient. In my experience, and I've seen him multiple times, he is an excellent primary care practitioner.
Sep 10, 2026
Scott L.
Sep 9, 2026
Therese M.
Friendly and efficient.
Sep 9, 2026
William T.
I was very pleased with Ah SAN’s attentiveness to my situation. He was polite and helped me get the medication I needed so I can begin to heal faster.
Sep 8, 2026
Margarita D.
Dr . Ryan is profecional dr
Sep 3, 2026
Jeff G.
He gets me and understands my needs.
Sep 2, 2026
Thomas H.
Very responsive, approachable and attentive. Tells it like it is.
Sep 2, 2026
William T.
Very satisfied with Ryan Ah San.
Aug 28, 2026
Marguerite F.
I’m always honest with my ratings and continue to be satisfied with my care but if im being completely honest today’s visit was a little rushed.
Aug 27, 2026
Manuel O.
Aug 27, 2026
Daniel E.
Aug 27, 2026
Robert K.
Very professional and provided good advice.
Aug 27, 2026
Kathy G.
He is always so kind
Aug 24, 2026
Glenn M.
Aug 19, 2026
Stephen P.
Aug 19, 2026
Christian F.
Very helpful and informative.
Aug 18, 2026
Ahmad N.
He is very helpful and listening to me and also explaining to me what should I do for my health
Aug 14, 2026
Stacy P.
Great guy and takes concerns seriously.
Aug 14, 2026
Jason G.
Ryan was great. The usual excellent service and quality I’ve come to expect from Memorial Care
Aug 14, 2026
Betty O.
Very helpful and knowledgeable . Felt reassured
Aug 14, 2026
Kathleen P.
Aug 13, 2026
Randy M.
Great listening, excellent rapport and genuine care for my well being.
Aug 12, 2026
David E.
Aug 12, 2026
Chris L.
Aug 12, 2026
Sheri G.
Mr. Ah San is always very attentive to me as his patient and I appreciate that!
Aug 10, 2026
Thomas G.
Always follow up and verify thorough explaining to me so I understand.Highly recommended.
Jul 23, 2026
Sheila K.
Friendly, professional service
Jul 21, 2026
Raul R.
Dr. Ah San always takes the time to listen to every concern that I might have and also to treat all of my health issues.
Jul 14, 2026
Lucian N.
Always impressed with his courtesy and professionalism. I trust him with my Health issues, without reservation. I always recommend PA Ah-San to my friends and family.
Jul 13, 2026
Joe G.
He is always very thorough in his evaluation and seems genuinely concerned about my well being. Very easy to talk to. Just an all around good person.
Jul 9, 2026
Amat T.
Annual physical
Jul 8, 2026
Morteza M.
Jul 8, 2026
Edgar V.
Dr. Ah San is always incredibly professional and helpful. He asks great questions and listens attentively. He provides outstanding insightful medical knowledge and recommendations. One of the best!
Jul 7, 2026
Ruth I.
Ryan K. AhSan I’ve known for many years. He is always caring, listens to all patients concerns and finds solutions to every problem. Couldn’t ask for a better PA.
Jul 6, 2026
Sally S.
Jul 6, 2026
William G.
Through and addressed my questions with a plan
Jul 2, 2026
Elizabeth B.
Quick as I want and very through. I got 2 shot today and I barely felt it
Jun 30, 2026
Elizabeth K.
Jun 29, 2026
Richard P.
Outstanding doctor really cares
Jun 29, 2026
Maureen K.
He listens
Jun 29, 2026
Cheryl G.
He is very interested in providing the best care fr me and my wellness journey.
Jun 25, 2026
Letecia E.
Very good
Jun 12, 2026
Joan E.
Mr. Ah San is ALWAYS very compassionate, thorough and takes as much time with me as I need . He answers all my questions and never makes me feel hurried.
Jun 9, 2026
Maria R.
He listen my problem
Jun 8, 2026
William C.
Very good experience. He explained everything to my full understanding.
Jun 8, 2026
Ratna P.
Excellent Dr explained everything very well Not much waiting...
Jun 2, 2026
Russell B.
Most trusted with my overall health.
Jun 2, 2026
Aida K.
Jun 1, 2026
Charles M.
May 27, 2026
Marta R.
May 21, 2026
Jarod I.
May 19, 2026
Patricia B.
Very thorough
May 16, 2026
Anonymous
The best experienceDr. Ryan was kind, he explained on understandable manner and he attended all the questions in an adequate way.
May 15, 2026
Marguerite F.
My physician for 10+ year. He’s professional, knowledgeable and compassionate. The entire office is amazing.
May 15, 2026
Luz H.
Dr. Ryan was kind, he explained in a understandable manner and he attended all the questions in an adequate way.
May 14, 2026
Kimberlyann B.
Ryan is thorough, efficient and very knowledgeable. He is also very kind and courteous.
May 13, 2026
Dorothy L.
I’ve been seeing Dr. Ah San for several years now and have the utmost confidence in his expertise. He’s thorough, reliable, and listens to you.
May 13, 2026
Yecenia M.
He is one of the best doctors. He is always on top of everything and making sure we get everything done.
May 13, 2026
Elisa F.
He was extremely detailed and very informative
May 11, 2026
Sheri G.
He listens to what you have to say and helps your figure it out without judgement or fault. I am in the best place in my health with his help!
May 5, 2026
Thomas K.
Ryan was very understanding
May 5, 2026
Ann D.
Mr Ah San always help me with all my medical problems.
May 4, 2026
Glenn K.
Really friendly and explained everything clearly
May 4, 2026
Heidi K.
May 4, 2026
Mary S.
May 1, 2026
Zoria R.
Did a thorough analysis.
Apr 30, 2026
William T.
Very informative , always answers your questions. Would recommend him to family and friends.
Apr 30, 2026
Margarita D.
The best details doctor, se preocupa por su paciente
Apr 28, 2026
Curtis E.
Great doctor
Apr 24, 2026
Iris R.
I like the way he explains everything and the time he takes
Apr 23, 2026
Kurt H.
Great personality, listens to patients & takes time to give individual attention.
Apr 21, 2026
Kim E.
He listens to my concerns. He’s knowledgeable and always has a good solution for my health issues.
Apr 21, 2026
Paul M.
Very helpful and quick to respond to questions
Apr 19, 2026
Joe D.
Apr 18, 2026
Saeid V.
He’s an excellent doctor. He is compassionate, attentive, and genuinely invested in his patients’ well-being. My father truly trusts him and feels well cared for at every visit.
Apr 14, 2026
Greg N.
Apr 9, 2026
Linda S.
Very kind and respectful to elderly people. But he doesn't make one feel like they are feeble and don't know up from down. He's the best doctor I have ever had..❤️
Apr 9, 2026
Eduardo P.
Apr 8, 2026
Shelley S.
Very pleasant and I would highly recommend
Apr 6, 2026
Thomas L.
Apr 3, 2026
Cathleen P.
Very knowledgeable I was definitely impressed and I really appreciate it his help
Apr 2, 2026
Juan I.
We have known Keone Ah San for many years. Throughout the years he has always provided excellent service and advice. He takes the time to listen, understands our concerns and guides us to help us understand what we need to do and follows through with all issues discussed.
Apr 2, 2026
Awng D.
Good doctor.
Mar 31, 2026
Fred C.
He always checks up on me and asks clarifying questions
Mar 31, 2026
Paul V.
Dr Ryan Ah San, is completely exceptional, he's taking enough time to find out what's the problem of my symptoms . I recommend him 100% .
Mar 31, 2026
Randy M.
Dr. Ah San is the best - easy to understand, listens to what I share, asks questions that shows he cares, great rapport, provides sound advice, and recommendations on my medical care. I am in good hands with Dr. Ah San as my PCP!! 👍
Mar 30, 2026
Richard Z.
Great care giver
Mar 27, 2026
Kevin R.
Mar 26, 2026
Anthony D.
Have seen the PA before and would are again when I can not see my primary physician.
Mar 25, 2026
Ardis B.
Very caring doctor!
Mar 25, 2026
Nancy C.
I put full trust with Mr. Ah San. Always thorough and always listens intently if I have any questions re his observations. Been seeing him for 7 years now and would not want anyone else to
Mar 24, 2026
James C.
Did an excellent job of explaining the symptoms and the treatments
Mar 23, 2026
Therese M.
Mar 21, 2026
John C.
Mar 21, 2026
Vernon W.
Excellent rating!
Mar 19, 2026
James P.
Mar 19, 2026
Ivan O.
Professional, dire, thorough assessment of my lab results and sound guidance and open discussion of my next steps in becoming healthier
Mar 18, 2026
Robert S.
Ryan is a great clinician, explains things well and always looks out for patient well being.
Mar 10, 2026
Juan E.
Mar 10, 2026
Christine V.
He was very informative. Explain clearly about my visit.
Mar 10, 2026
Michelle S.
Rayan K Ah San always listens thoroughly. He goes through my chart before meeting each time address any issue I may have and make sure I’m up-to-date on all my tests.
Mar 10, 2026
Scott L.
He listens to you and cares about your issues.
Mar 9, 2026
Roberto V.
Mar 3, 2026
Leticia V.
Mar 3, 2026
Raul R.
Dr. Ah San is the best. Every time I have an appointment to see him, he gives me the impression that he really cares about my health and my wellbeing.
Mar 2, 2026
Paramjit K.
DR. Ryan performed a very good annual review along with other suggestions for health improvement as well as follow up appointments and suggestion for a PT doctor. Good visit.
Feb 27, 2026
Chi C.
He’s fantastic and will tell you what’s going on
Feb 26, 2026
Thomas B.
Very thorough
Feb 25, 2026
Ian S.
Feb 25, 2026
Dennis S.
Feb 23, 2026
Denise L.
Mr Ahh San has been my main health care provider for many years. He is personable, medically knowledgeable and I trust him implicitly. I have highly recommended him to family and friends .
Feb 23, 2026
Rhandee A.
Feb 21, 2026
Avery A.
Feb 20, 2026
Erin M.
I think he is a compassionate and caring man. Very thorough with all my questions. He never makes you feel rushed like he’s running off to his next patient
Feb 19, 2026
Dinesh S.
A wonderful and thorough doctor who provides clear guidance and has great insight, experience, and trust
Feb 19, 2026
Shirley J.
He was very attentive
Feb 19, 2026
Tim D.
Feb 18, 2026
Maria E.
He always takes the time to ask about my symptoms and answer any questions I might have.
Feb 18, 2026
Douglas M.
Great communicator and very thorough!
Feb 17, 2026
Robert N.
Dr. Ryan is the best.
Feb 16, 2026
Michael W.
Ryan is always personable and professional.
Feb 16, 2026
Daniel E.
Feb 14, 2026
Marcy P.
Very caring nature, explaining all the way and helpful with the medicine.
Feb 12, 2026
Joe C.
Going to the doctor, not my favorite thing but talking to this young man is always a blessing. Everything gets taken care of.
Feb 10, 2026
Jason F.
Feb 10, 2026
Daniel L.
Very knowledgeable. Better then any DR I’ve seen.
Feb 10, 2026
Valerie H.
Always personable, and never rushes through the appointment
Feb 9, 2026
Sheri G.
He listens to you and helps you 100%
Feb 6, 2026
Rickey P.
Feb 4, 2026
Fernando V.
Great customer support and very thrurough about any questions asked. Reason I still come to this location.
Feb 3, 2026
Jeffrey J.
Feb 3, 2026
Nina B.
Listened to my problem and spent time to ask me the history of my problem and explaining the steps to take for solving it.
Feb 3, 2026
John D.
Ryan is very thorough and easy to talk to.
Feb 3, 2026
Robert A.
He was detailed and decisive
Jan 29, 2026
Amat T.
Mr. Ah San is attentive a always looking out for me as his patient.
Jan 29, 2026
Saritha R.
Jan 28, 2026
Richard B.
Jan 28, 2026
Jeff G.
Jan 20, 2026
Lawrence G.
Keone has been my primary care doctor for many years. He is always easy to discuss health issues with and is very knowledgeable.
Jan 19, 2026
Kristina K.
He's a very kind man, explains things thoroughly and listens to feedback.
Jan 17, 2026
Anonymous
Office visitThorough and genuinely kind. Professionally addresses health concerns with compassion. Easy to talk to. Listens attentively to my concerns and answers questions respectfully.
Jan 16, 2026
Michael H.
Thorough and genuinely kind. Professionally addresses health concerns with compassion. Easy to talk to. Listens attentively to my concerns and answers questions respectfully.
Jan 16, 2026
Sonia K.
Jan 16, 2026
William T.
Always happy with Dr. Ah San. Hope he never leaves RSM.
Jan 15, 2026
Ryan R.
Always friendly, attentive, on point, helps guide in the right direction. 1st Dr I felt like actually listens and tries to help
Jan 14, 2026
Adrien K.
Great PC!Thank-you!!
Jan 14, 2026
Leonor G.
Jan 13, 2026
Abhishek M.
Extremely approachable. Listens well!
Jan 9, 2026
Steven M.
Ryan always takes the time to explain all the issues options with vaccines urgency of follow up on skin, etc. this extra context really helps and is appreciated. Thank you.
Jan 9, 2026
Michael M.
Jan 8, 2026
Mercedes S.
Excellent
Jan 7, 2026
Denise M.
Very knowledgeable, polite, clean office. He always listens to my concerns and gives me feedback when other doctors have not listened. Always a pleasure to see him.
Jan 7, 2026
Kimberlyann B.
I have been seeing Ryan for years….he is kind, professional, thorough and very knowledgeable.
Jan 7, 2026
Dennis P.
Mr Ah San is always good. Listens and provides sound advice. Never in a rush.
Jan 7, 2026
Raymond W.
Extremely knowledgeable, very efficient and knows me well.
Jan 5, 2026
Michael H.
Mr. Ah San is very considerate, takes the time to understand my issues and provides helpful advice and treatment.
Jan 5, 2026
Diane M.
The entire staff was absolutely incredible & refreshing to experience. As I entered the building as soon as my named was asked it was immediate, & ok your checked in & please have a seat in Suite C. Every person was very welcoming, friendly, professional & efficient.FRONT OFFICE: Adrian, Sarah, Marne, Jerry. PA: Ryan Keon Ah SanMedical Asst.: Veronica Very Caring & Compassionate!!
Jan 2, 2026
Kim E.
He listened to the concerns I had about my symptoms and gave me an accurate diagnosis.
Jan 1, 2026
Marguerite F.
For excellent care and treatment on every single visit for past 10+ years.
Jan 1, 2026
Keith T.
Ryan K Ah San is a tremendous asset to MemorialCare Medical Group.He listens closely, he's engaged and focused, and he is informative and clear on directions. He is a knowledgeable medical professional and an impressive communicator.MemorialCare is fortunate to have him on board, and I feel lucky to have been connected to a consultation with him.
Dec 29, 2025
Bernadette L.
Dec 26, 2025
Anna J.
Excellent at diagnosing and making appropriate recommendations for at home care
Dec 24, 2025
Claudia B.
He is very kind and professional .
Dec 24, 2025
Jamie C.
Keone is the most patient and thorough medical care provider I’ve experienced. Grateful for the time and consideration he shows his patients.
Dec 23, 2025
Ann D.
He always take very good care of myself.
Dec 16, 2025
Esmeralda O.
He took an interest in my problem
Dec 12, 2025
Natalie A.
Mr. Ah San is always wonderful! Kind, thorough and thoughtful in his approach, and always patiently takes the time to listen and answer your questions.
Dec 12, 2025
Jose C.
👍👍👍👍👍👍👍👍👍👌👌👌👌👌
Dec 12, 2025
Samantha W.
He’s a great practitioner, always listens and is kind
Dec 11, 2025
Andrew A.
Dr Ah San, is very straight forward and doesn’t waste time. Love that. Saw him only twice and had great experiences
Dec 9, 2025
Clifford C.
Dec 9, 2025
Guillermo Z.
Dec 8, 2025
Chris L.
Very considerate and thorough!
Dec 3, 2025
Dinora C.
Really like the Doctor very knowledgeable, caring, asked questions and made me feel very comfortable.
Dec 3, 2025
Russell B.
Always top notch.
Dec 3, 2025
Brett C.
Dec 1, 2025
Mojdada M.
He is care about patients
Nov 28, 2025
Gloria Q.
Nov 25, 2025
David A.
Great listener! Very thorough.
Nov 24, 2025
Rosa H.
He listens and cares for client’s well being.
Nov 21, 2025
Wanda B.
Nov 21, 2025
Steve S.
Super knowledgeable and friendly
Nov 20, 2025
Brian L.
Nov 19, 2025
George F.
Knowledgeable, courteous.
Nov 17, 2025
Monica E.
He explain very well everything and takes the ruine to check why are you suck
Nov 17, 2025
Brian B.
Dr Ah San was friendly and very helpful
Nov 14, 2025
Ivan O.
Direct and explainable results of my lab
Nov 7, 2025
Anonymous
Listens and understandsListened to my concerns and gave options.
Nov 6, 2025
Clyde H.
Dr. Ah San was straight forward, thorough and understanding. Listened to my concerns and gave me options.
Nov 5, 2025
Roberto V.
On time and know my ailment very well
Nov 4, 2025
Eric K.
He was very thorough.
Nov 4, 2025
Brett C.
I like that my doctor listens to me and my issues and has a structured plan to deal with them. He is a great doctor!
Nov 3, 2025
Ward T.
Great common sence.
Oct 30, 2025
Loni G.
So thorough and thoughtful. Did not feel rushed at all and yet I was in and out because they honor your time in the office. Very happy with my first experience here and already recommended Dr. K to my husband.
Oct 30, 2025
Randy
Dr. Keone Ah San listens to what I have to say and give very good advise and/or feedback. Takes the time with each visit and follows up as needed. I know I am in safe hands with my healthcare with Dr. Ah San. Highly recommend Dr. Ah San to anyone looking for a great PCP.
Oct 28, 2025
Thomas B.
Very focused on all aspect of my visit
Oct 23, 2025
Erin M.
He listens to what you have to say and addresses everything. Doesn’t rush you in and out. Easy to talk to.Caring person.
Oct 22, 2025
Steven V.
Oct 21, 2025
Michael W.
Keone is always highly professional in all aspects of the visit. He listens to concerns, is very detailed in his examination and communicates accurately and concisely.
Oct 21, 2025
Robert S.
Great service.
Oct 20, 2025
Jose G.
This pa is very professional and show concern for his patient. Thank you
Oct 20, 2025
Herminia C.
He is always concern about my health and keep me up to date the new thing to keep me healthy
Oct 17, 2025
Anonymous
He is amazing and I trust himDr keone ah san is amazing. He is incredibly knowledgeable and takes the time and has great patience to explain things to me. I trust him. He is an asset and gem.
Oct 16, 2025
Tyler H.
Oct 16, 2025
Anonymous
Excellent careThis was a very good visit. Mr Ah San took the time to listen to my concern, explained the course of treatment and addressed any additional concerns. He did not rush through the visit. Overall a great experience.
Oct 16, 2025
Olivia D.
Oct 16, 2025
Stacy S.
Dr keone ah san is amazing. He is incredibly knowledgeableand takes the time and has great patience to explain things to me. I trust him. He is an asset and gem.
Oct 14, 2025
Anonymous
Didn't feel rushed
Oct 14, 2025
Paul S.
Genuine concern
Oct 10, 2025
Thomas G.
Completely satisfied! Professional and explains everything to me so I can understand my options.The best provider I have ever had!
Oct 10, 2025
Anonymous
Smart, conscientious provider.It was my get established visit and he was very thorough in reviewing the information in the system. He didn’t hesitate to answer questions , nor to research a question he didn’t have the answer to regarding MRNA.
Oct 9, 2025
Irene T.
He’s very smart, knowledgeable and articulate. I appreciate his researching a question asked regarding Mrna and coming back with the answer.
Oct 8, 2025
Jennifer W.
He’s very nice , & professional.
Oct 6, 2025
Cindy R.
He spent time with me and answered my questions. I didn’t feel rush!
Oct 3, 2025
Robert L.
Excellent and through
Oct 2, 2025
Jodi N.
Friendly, clear and knowledgeable.
Oct 2, 2025
Carol K.
I appreciate his thoroughness, empathy and listening skills.
Sep 30, 2025
Mark D.
Quick and easy
Sep 29, 2025
Michael H.
Mr. Ah San is a rock star among care givers. Not sure what else I can say. Smart. Great communicator. Really listens and cares. Highly HIGHLY recommend!
Sep 29, 2025
Pamela S.
He’s very knowledgeable and very thorough.
Sep 29, 2025
Kathy G.
PA Ryan, is kind,very knowledgeable and listens to what I say. I never feel rushed with him.
Sep 24, 2025
Sebastian F.
Mr. Ah San is very professional and thorough. Does a great job listening.
Sep 19, 2025
Leticia S.
Like always, the experience is very positiveThe
Sep 18, 2025
Birgit H.
Great doctor who listens and addresses your concerns.
Sep 16, 2025
Valerie H.
Very personable
Sep 9, 2025
Roger H.
Personable and knowledgeable. Always look forward to visits.
Sep 8, 2025
Jeremy E.
Excellent
Sep 4, 2025
Fred C.
As always he listens and responds thoughtfully and professionally to my questions as if I was a friend who can handle the good and challenging truth he gives.
Sep 3, 2025
Veronica D.
I felt heard and was given options. He is easy to talk to.
Sep 3, 2025
Nathan B.
Dr. Awesome is the best
Sep 2, 2025
Mikayla S.
On time. Great listener and sense of humor. So knowledgeable!
Aug 28, 2025
Ed P.
Aug 28, 2025
Ann D.
Aug 27, 2025
Alberto L.
I had a great experience and he did a thorough explanation of what was going on
Aug 26, 2025
Mayra N.
PA Ah Son is always polite and very professional. Trust his opinion and his advice.
Aug 20, 2025
Anonymous
Cares about patientsHe’s knowledgeable and cares about my well being. He’s quick at responding messages and I appreciate his kind personality
Aug 20, 2025
Russell B.
Always takes the time to explain things, always feel you are in the know of his thoughts and recommendations.
Aug 20, 2025
Teresa C.
He was very throughout
Aug 19, 2025
Rosa H.
He’s knowledgeable and cares about my well being. He’s quick at responding messages and I appreciate his kind personality
Aug 18, 2025
Randy M.
Dr. Keone is thorough, friendly and genuinely cares. Gives sound advice also.
Aug 11, 2025
Michael L.
He is knowledgeable and friendly, seemed to care about my concerns
Aug 11, 2025
Barton E.
PA Ah San is always friendly, professional and knowledgeable. Been going to him for years.
Aug 8, 2025
Alexander K.
He was so helpful and thorough and efficient!
Aug 8, 2025
Raymond W.
Everything. Visit was prompt. Listened to my health issue well. Performed brief exam which was incredibly useful. Prescribed both short-term and long-term improvement paths. Fantastic job!!!
Aug 6, 2025
Barbara K.
Ryan was excellent. He listened and addressed all of my questions and I have many appointments to go to now thank you for helping me stay healthy! I don’t believe he is the best doctor I have ever been to so far
Aug 6, 2025
James M.
He’s a great physician very friendly very knowledgeable. I like him a lot would recommend him highly to anybody.
Aug 6, 2025
Kristina K.
He was thorough and clear with what he thought I needed to do discuss different options with me and was very accommodating
Aug 4, 2025
Audy M.
Excellent medical provider.
Jul 31, 2025
Darrel B.
Very thorough.
Jul 29, 2025
David B.
Appointment same day, quick office visit and treatment
Jul 25, 2025
Sallie G.
He is real, honest, and clearly cares.
Jul 23, 2025
Stephen D.
He's a very intelligent doctor and a pleasure to deal with. By far the best doctor I've had since coming to Memorial.
Jul 22, 2025
Dennis O.
Doctor explained in detail many tips to stay healthy. Answered all questions.
Jul 22, 2025
Kelly P.
He’s cool 😄
Jul 19, 2025
Anonymous
Dr is listening to me and clearly he is talking abDr is listening to me and clearly he is talking about my health condition and giving me the best advice and medication
Jul 18, 2025
Ahmad N.
Dr is listening to me and clearly he is talking about my health condition and giving me the best advice and medication
Jul 18, 2025
Ivan O.
Great assessment of my illness and provided excellent insight and analysis on my condition and recommended a sound treatment plan
Jul 16, 2025
Vivian L.
I love that he always takes the time to explain everything, And listen the patient.
Jul 16, 2025
Katherine P.
He listened to my problems & he listened i felt comfortable with him.
Jul 11, 2025
Romina M.
I always love coming to do my annual exam. The provider is always so sweet and accommodating, highly recommend.
Jul 1, 2025
Everett O.
PA Ryan is great and motivating me to make healthy choices. He was prepared for our video appointment with a thorough understanding of all my blood results and recommendations.
Jun 30, 2025
Judy D.
Great doctor, always on time, explains things clearly, and provides effective treatment with good follow up.
Jun 25, 2025
Kristin S.
Very professional and took the time to listen and give me an understanding of what I came in for and best ways to move forward
Jun 21, 2025
Evelyn S.
He was so knowledgeable about my issue and helped me get my Rx even easier than before So grateful to him
Jun 20, 2025
Marguerite F.
Mr. ah San is by far the best PA (Doctor) i have ever seen. I recently referred a friend to him and she absolutely was so impressed and thankful.
Jun 19, 2025
Jorg K.
Good feedback.
Jun 18, 2025
Carol I.
Explanation of decision making process clear. Good collaboration with patient on plan
Jun 16, 2025
Eric P.
He took his time, went over everything on my blood work had good suggestions. Ask if I had any questions
Jun 12, 2025
Maria G.
He make me feel confident in my health, he explained wherever I consurn about He is patienr and kind He is a good Doctor he really cares about others
Jun 10, 2025
Tim D.
He is open and honest with me.
Jun 9, 2025
Saritha R.
Good experience.
Jun 5, 2025
Michael W.
Ryan K Ah San is always highly professional, detail oriented and an outstanding listener. He listens when explaining symptoms, matches what was stated with background and info on chart, and diagnoses based on facts. He is very credible and always makes you feel at ease as a patient.
Jun 4, 2025
Brett C.
I’m extremely happy with my doctor. He is attentive and always shows that he genuinely cares about my health. I would recommend him to anyone looking for a top notch health care provider.
Jun 4, 2025
Gina C.
Jun 4, 2025
Sharmaine F.
Jun 3, 2025
Dean M.
Jun 3, 2025
Kathleen P.
Jun 3, 2025
Jeremy E.
Amazing care from the entire staff and Physician.
Jun 3, 2025
Samantha W.
Everything
Jun 3, 2025
Fred C.
He listens to me and my concerns and brings up concerns to be discussed. He seems very knowledgeable
Jun 2, 2025
Joseph J.
He’s my primary doctor.
Jun 2, 2025
Bruce F.
Very professional and right on time for video appointment.
May 30, 2025
Norma G.
He took the time to listen to my concerns, gave me a plan of care.
May 28, 2025
Denise C.
Mr. Ah San is very nice and takes an interest in my care. He always provides me with good information regarding my health concerns.
May 28, 2025
Nancy C.
Great listener and very caring
May 28, 2025
Armand W.
Great at communication. Takes time to understand, deliberate and explain. Don’t rush to conclusions
May 27, 2025
Desmond F.
He seems to really want to help
May 23, 2025
Diana C.
He is very thorough
May 22, 2025
Stephen E.
He is very thorough and professional.
May 22, 2025
Robert V.
Great advice and counsel. Courteous and professional.
May 22, 2025
Daniel F.
Best care provider I have ever had, and one of the warmest people that I know. He really cares about me, my health, and my spirit. Whenever I come in to the office, I know that I am with someone who is focused on helping me be the healthiest that I can possibly be.
May 22, 2025
Michael W.
Ryan is always personable and takes time to listen to me.
May 19, 2025
Reginaldo E.
I will alway be indebted to Dr. Ah-San for his proactive care. He played a primary role in saving my life. He worked in concert with my Cleveland Clinic transplant team to remove the barriers that the Health Care system can inadvertently construct. If you need a can-do doctor who genuinely cares about his patients, Dr. Ah-San is your person.
May 19, 2025
William T.
May 19, 2025
Robert N.
May 19, 2025
Norma N.
Attentiveness and professionalism.
May 17, 2025
Larry B.
Excellent! Very personable, great bedside manner.
May 9, 2025
Cheyne T.
Suggesting a sensible approach to my current symptoms.
May 9, 2025
James U.
Candid and thorough explanations and healthy recommendations
May 7, 2025
Kyle P.
Very knowledgeable and helpful, he was able to answer all my questions.
May 6, 2025
Claudia B.
Very knowledge, very professional and always caring for the patients.
May 5, 2025
Russell B.
May 5, 2025
Patricia B.
May 5, 2025
Linda Z.
He’s always so thorough, makes sure I understand, and answers any questions I have.
May 5, 2025
Valerie H.
May 2, 2025
Raul R.
Dr. Ah San is real thorough and is focused on my well being.
May 1, 2025
Clyde H.
Dr. Ah San was very positive on his feedback on my condition and had helpful suggestions on what I should do to stay healthy.
May 1, 2025
Michelle M.
Very professional and all of my questions answered!
May 1, 2025
Manuel O.
Great
May 1, 2025
Richard Z.
Very caring and considerate
May 1, 2025
Leticia P.
He is the best
Apr 30, 2025
Carol K.
He listens and had good ideas for me to move forward.
Apr 30, 2025
Sandra W.
He’s always punctual so I don’t have to wait. Very thorough with my medical care.
Apr 30, 2025
Cristobal V.
Greatest attention
Apr 30, 2025
Edward L.
On time and responsive to questions.
Apr 29, 2025
Roberto V.
On time and thorough in check up
Apr 25, 2025
Curtis E.
Very friendly
Apr 23, 2025
Wendy T.
Brian Nissan is always professional and very informative. And his nurse was very kind and informative also
Apr 9, 2025
Trever H.
Asks questions, great listener and explains things so both my son and me understand.
Apr 9, 2025
Paul S.
The excellent bedside manner.
Apr 9, 2025
Suzanne K.
Mr Ah San listens. He is informative. He understood my concerns and addressed them all.
Apr 9, 2025
Steven M.
Dr Ryan took the time to review all my results and answered all my questions.
Apr 8, 2025
Yassman B.
Amazing attitude and knowledge
Apr 8, 2025
George D.
Always caring.
Apr 7, 2025
Andrew M.
Good bedside manner. Professional. Good listener.
Apr 7, 2025
Alberto L.
Friendly and everyone made my Dr. visit feel as if was greeted by family
Apr 7, 2025
Julia E.
He was through. He understood my concerns and put me at ease. His personality was funny and warm. He was easy to talk with.
Apr 4, 2025
Michael A.
Fast friendly professional and informative.
Apr 4, 2025
Kenneth F.
Apr 3, 2025
Hillary H.
Apr 2, 2025
Henry H.
Apr 1, 2025
Aulani A.
Ryan was great! He was quick yet thorough. Very friendly and did great speaking with my daughter. Thanks Ryan!
Mar 31, 2025
Kurt H.
Great bedside manner. He listens, explains and provides easy to understand explanations & reasoning. Very nice doctor.
Mar 31, 2025
Christina P.
Amazing. and through
Mar 31, 2025
Deborah W.
Easy to talk to and explains everything clearly.
Mar 31, 2025
Wanda B.
Listened to me and provided possible solutions
Mar 29, 2025
Cheryl C.
He listened to me and asked all the right questions to figure out what was going on .
Mar 27, 2025
Kent B.
He is very knowledable and personnable.
Mar 22, 2025
Sarah V.
He was nice and very knowledgeable. Gave me peace of mind for my reasons for visiting.
Mar 21, 2025
Tyler O.
Timely, kind and professional care.
Mar 21, 2025
Michael S.
Awesome doctor and we make a plan 100% and follow up is very much appreciated 24/7
Mar 20, 2025
Jocelyn P.
Mar 20, 2025
Kayleigh S.
Mar 19, 2025
William L.
Mar 15, 2025
Lynda O.
Attentive and listened
Mar 10, 2025
Aryo N.
He is very knowledgeable, caring and personable
Mar 10, 2025
Scott L.
Mar 3, 2025
Brian D.
Super engaged, clearly knows what he is doing, left feeling like I was in a better place than when I walked in. Solid plan that I like and can follow. I trust the care he is providing.
Mar 3, 2025
Scott N.
Good communication, took care of a couple of issues and was able to get my blood test done.
Mar 3, 2025
David A.
Great provider!
Feb 27, 2025
Derek M.
Feb 26, 2025
Gilbert B.
He is very accommodating.
Feb 25, 2025
Jean H.
I am satisfied with every aspect of my care.
Feb 21, 2025
Nancy C.
Dr. Ah Sahn is such a good and caring PA. Always listens well and explores all avenues to any issue presented. Very knowledgeable and always willing to explain in detail symptoms and solutions.
Feb 19, 2025
Carlo A.
Feb 18, 2025
Kevin K.
It was great. It is unfortunate when doctor Cienciola which is my primary physician can no longer be available at your facility! Every occasion when I am sick, he is impossible to be reached . Perhaps it’s time for him to leave or for myself and my family to look into another care facility and not to visit memorial care anymore.
Feb 18, 2025
Patrick M.
Ryan is so thoughtful and kind.
Feb 18, 2025
Gregory G.
Ryan was personable, professional, informed, and very deliberate about my health, making sound recommendations which are actionable.Ryan is a credit to your team!
Feb 18, 2025
Victoria T.
Dr. San was very attentive and caring. Truly made an effort about my concerns coming in! He has great energy and i highly recommend him
Feb 17, 2025
David C.
His knowledge, patience and willingness to helpMe.
Feb 13, 2025
James M.
now he’s a great doctor. He’s been my doctor for three or four years. He’s really good. Keeps me updated on everything. I see him once a year for a check up but highly recommend.
Feb 10, 2025
Michele J.
He listened to me and was able to diagnose quickly
Feb 7, 2025
Eduardo P.
Feb 6, 2025
Dana G.
He was very kind very clear took time to explain things he is great
Feb 5, 2025
Kym L.
Mr Keone Ah San was fast and efficient. I was in and out of the office in a jiffy. He is kind and listens to you.
Feb 5, 2025
Richard C.
He was a friendly physician and I felt comfortable there. The whole staff was very friendly.
Feb 5, 2025
Robert B.
My visit was very pleasant and very informative.
Feb 5, 2025
Joseph B.
Feb 4, 2025
Michael H.
Ryan is very easy to communicate with and understands my health needs.
Feb 3, 2025
Therese M.
On time
Feb 3, 2025
Precilla C.
Listened and was thorough.
Feb 3, 2025
Kevin G.
Jan 31, 2025
Mayra N.
PA Ah San is always very courteous and professional. He always makes you feel comfortable and well taken care of.
Jan 30, 2025
Leticia S.
He pays attention to what I have to say and he listens to me. You don’t get that today with a lot of doctors. They’re always in a hurry.
Jan 30, 2025
Leonel B.
Excelente
Jan 30, 2025
Donald M.
Jan 28, 2025
Leticia P.
Very nice doctor
Jan 28, 2025
Russell B.
The Doctor is pleasant but direct and makes you comfortable.
Jan 27, 2025
Everett O.
I had trouble logging in to the zoom appointment, but Dr ryan took the time to call me directly on my cell phone to initiate our appointment.
Jan 27, 2025
Thomas B.
Best doctor I ever had
Jan 26, 2025
Raymond W.
Quick, accurate exam and proposed solution.
Jan 23, 2025
Lois M.
Helpful understanding, friendly and patience
Jan 22, 2025
Wendy T.
Ryan ah san is knowledgeable caring and kind.
Jan 20, 2025
Beverly K.
This was my first time seeing him and he was very professional and took the time to talk with me and explain his assessment. He also made sure that I got an appointment with a specialist and necessary x-rays. I was overall very pleased with my appointment today.
Jan 20, 2025
Leonor G.
Jan 17, 2025
David H.
His Bedside manner is Awesome
Jan 15, 2025
Dejan S.
Appreciate the details provided & quick meeting.
Jan 15, 2025
Erik G.
Very professional. Listens and cares. Follows up on previous visit discussions and shows a genuine interest in his patients’ health.
Jan 9, 2025
Ardis B.
Jan 8, 2025
Randy M.
Dr. Keone is pleasant, respectful, thorough, and I felt he has my best health interest in mind with his recommendations.
Jan 7, 2025
Herminia C.
He is a smart PA and understand your issues right away
Jan 6, 2025
Fernando V.
Easy to talk to, also cares about how you are doing. Does a great job explaining what is going on and how the medication you are taking will help or not.
Jan 6, 2025
Jeff G.
Knows me as a patient better than any doctor I have ever been associated with. Just a great, smart guy.
Jan 6, 2025
Alberto Y.
The best interaction with professional physician. The application portal is absolutely awesome!
Jan 6, 2025
Steven M.
PA-C Ryan always takes time to explain results, tests, medication, etc in detail, and always listens to my concerns and answers all my questions
Jan 6, 2025
William T.
Our family is very pleased with the attention that Dr. Ah San has shown our family. We hope that he stays at the R S M office.
Jan 6, 2025
Michael W.
Very thorough examination. Asks questions, reviews chart and answers based on individual medical history and background. A true professional and very detailed exam routine.
Jan 6, 2025
Juan F.
Dr. Ah San always takes the time to explain results or answer questions. More than that, he makes you feel like it's a partnership not just Dr. to patient relationship.
Jan 3, 2025
Ann D.
Dec 19, 2024
Joshua H.
Was easy
Dec 19, 2024
Lawrence G.
He was on time and spent a good amount of time going over my various issues.
Dec 19, 2024
Margaret F.
The doctor was friendly and thorough.
Dec 18, 2024
Gail R.
I think he's wonderful. He's very thorough, helpful, and has a great bedside manner.
Dec 18, 2024
Manuel O.
Dec 17, 2024
Jeffrey Y.
Dec 16, 2024
Denise M.
Very professional. Efficient and very friendly.. Looks for details of my medical to make sure everything is OK. Very clean office.
Dec 13, 2024
Marguerite F.
Caring, professional and understanding.Lab/xray department are wonderful
Dec 13, 2024
Kent B.
Very personable doctor. He doesnt treat you like "just another patient" and seems generally concerned about your well being.
Oct 26, 2026
Rosie G.
Oct 14, 2026
Roland V.
No improvement needed.
Oct 13, 2026
Eric J.
Nice guy easy to get along with.
Oct 5, 2026
Nicole S.
Sep 27, 2026
Mohammad N.
Aug 24, 2026
Jesse O.
Great feedback as always
Mar 11, 2026
Lois M.
Was very patient, thorough and wanted to know if I had any questions for him after he finished explaining what was going on with me.
Feb 6, 2026
Bruce B.
He genuine, honest, and to the point. Just the way I like it. Does’nt was my time. Have a good day.
Jan 15, 2026
Mohammad N.
Dec 6, 2025
Steven M.
Oct 27, 2025
Deepali S.
Very thorough!
Oct 16, 2025
Kathryn L.
He was thorough, followed up with test results, and treatment plan
Oct 13, 2025
Le A.
Always thorough
Sep 28, 2025
Stephen P.
Mr Ah San takes care of us.
Sep 5, 2025
Steve R.
Thorough, super nice, always prompt
Sep 2, 2025
Penelope A.
Very good at listening and explaining.
Aug 28, 2025
Laura W.
Thorough
Aug 11, 2025
Caroline C.
Thorough
Aug 6, 2025
Joseph T.
O professionalism, knowledge
Jun 19, 2025
Taranjit A.
Nice guy, easy to talk to and go over problems
Jun 17, 2025
April A.
Timely
Jun 17, 2025
Paul V.
Dr explained what was wrong with my blood pressure.
May 2, 2025
Michael C.
Feb 20, 2025
Marcella C.
He was very through explained prescriptions and listened to my concerns
Jan 26, 2025
Ronnie L.
Jan 21, 2025
Eric C.
friendly competent medical professional
Mar 4, 2026
Alexandra M.
Dec 9, 2025
Sitao W.
Nov 26, 2025
Leon C.
Always a positive experience talking to that doctor
Nov 26, 2025
Megan W.
Nov 20, 2025
Debra R.
Oct 15, 2025
Solavuth T.
Good
May 23, 2025
Deborah F.
He spoke directly to me, listened to me, looked at my file and medical history and then discussed with me what he believed would help me and then reviewed with me what to look for in the coming days and what I should be feeling. He also said if In the next few days it didn’t go as we hoped and/or my symptoms worsen what I should do and where I should go.
Apr 3, 2025
Marina M.
He was personable and answered all my questions.
Mar 21, 2025
James S.
Much better the second time around
Mar 19, 2025
Solavuth T.
Thanks
May 11, 2025
Michael P.
No Comment
Feb 25, 2025
Austin T.
He was good, quick and straight to the point.
Jan 31, 2025
Pamyla L.
No Comment
Oct 3, 2025
Tina T.
No Comment
Jan 7, 2025
Jennifer B.
No Comment
Mar 28, 2025
Kate S.
No Comment
Oct 21, 2025
Shahzad M.
No Comment
Source: Reviews are aggregated from third-party review sites such as Facebook, Google, HealthGrades, RepuGen, Vitals, WebMD, and Yelp.