About

Sarah Hassan, MD joined the OC Blood & Cancer Care team in 2018. Originally from Chicago, she is excited to call Orange County her new home.

Before she began residency, Dr. Hassan worked as a research associate at the University of Illinois Department of Surgery in Chicago. While assisting with Islet Cell Transplant for Type 1 Brittle Diabetics, she discovered an interest in immunology, molecular biology, and progressive treatment options that aim to cure presumed incurable diseases. This experience greatly influenced her decision to pursue work in cancer treatments.

Dr. Hassan completed her Internal Medicine residency at St Vincent’s Mercy Medical Center in Toledo, Ohio in 2015. She completed her fellowship in Hematology/Oncology at the University of Cincinnati Medical Center in 2018. She is triple board certified in Internal Medicine, Hematology, and Medical Oncology.

Dr. Hassan supports Integrative Medicine and although she enjoys working with all patients, she is most interested in treating breast cancer. She strongly values patient autonomy and personalized medicine. Her goal is to provide empathetic care and dignity to every patient she treats.

In her free time Dr. Hassan loves to hike, spend time at the beach, travel, learn different languages, and appreciate art. She is fluent in Urdu and understands basic Polish and Spanish.

Board Certifications:
  • American Board of Internal Medicine- Internal Medicine
  • American Board of Internal Medicine-Medical Oncology
  • American Board of Internal Medicine-Hematology
Areas of Interest:
  • Breast Cancer
  • Supports Integrative Medicine
Languages

English

Provider Specialty

Hematology-Oncology, Hematology/Oncology

Areas of Care

Education

Medical School

Bahria University, Shifa College of Medicine

2008

Internship Program - Internal Medicine

Mercy St. Vincent Medical Center

2013

Residency Program - Internal Medicine

St Vincent Mercy Medical Center GME

2013

Internship/Residency - Internal Medicine

Mercy St. Vincent Medical Center

2015

Fellowship Program - Hematology

University of Cincinnati Medical Center

2018

Locations & Affiliations

Locations

MemorialCare Cancer Institute - Orange Coast Medical Center (Patient Care Pavilion)

18111 Brookhurst St. Suite 6100

Fountain Valley, CA

Office: 657-241-9755

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

5.0 out of 5
(500 Ratings)
Sep 2, 2026
Donald R.
She treats me like human being not like a number.
Sep 1, 2026
Brenda H.
Dr.Hassan is the kindest doctor I have encountered. She is thorough and detailed, and offers excellent care, knowledge, and heart.
Sep 1, 2026
Milagros A.
She’s very engaging and friendly. She shows concern to patients wellbeing
Sep 1, 2026
Percy T.
she listen......................
Aug 31, 2026
Karen P.
Very knowledgeable and personable.
Aug 30, 2026
Jody M.
Aug 28, 2026
Khodadad K.
She’s very kind and professional on her practice
Aug 28, 2026
Terri L.
Excellent Doctor. She listens, doesn't try to rush the appointment and explains things very well.
Aug 28, 2026
Cecilia L.
Aug 28, 2026
Shannon V.
A rating of 10/10 is actually too low for how amazing this doctor is. Dr Hassan really is a doctor who WANTS you to feel better and makes you feel heard. She’s super kind and caring. Would definitely always recommend.

Source: Reviews are aggregated from third-party review sites such as Facebook, Google, HealthGrades, RepuGen, Vitals, WebMD, and Yelp.