About

Dr. Castillo is passionate about LGBTQ medicine and strives to be an outspoken, visible leader within his community. He has a special interest in gender-affirming hormone therapy and the prevention of sexually transmitted infections (STIs). His practice includes specific time every week reserved for transgender patients to seek hormone replacement therapy (HRT) and preventative medicine in a caring and accepting environment. 

Dr. Castillo serves as Director of LGBTQ Health and Associate Program Director, Family Medicine Residency Program at MemorialCare Long Beach Medical Center. He is committed to training physicians who are mindful of social determinants of health, including socioeconomic status, education level, and health literacy—ensuring that all patients receive the quality care they deserve. 

In his free time, Dr. Castillo loves singing, making music, cooking, trying new restaurants, trivia and crossword puzzles. He is also an avid fan of Bay Area sports teams. He is fluent in English and Tagalog and speaks intermediate Spanish.

Languages

English

Provider Specialty

Family Medicine, Primary Care

Areas of Care

Education

Medical School

Touro University College of Osteopathic Medicine

2017

Internship/Residency - Family Medicine

Long Beach Medical Center

2020

Locations & Affiliations

Locations

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
(214 Ratings)
Oct 30, 2026
Echo F.
Oct 28, 2026
Portia R.
He listen to your concern and very approachable
Oct 28, 2026
Russell J.
He’s a good doc.. thank you so much much. For everything..
Oct 28, 2026
Ricardo M.
Nowadays rarely will you find a doctor that will listen to you and take their time explaining things to you, Dr. Castillo is that kind of a physician.
Oct 28, 2026
Veni P.
Oct 16, 2026
Sandra T.
Oct 15, 2026
Velvet E.
Mr.Castillo was very help with all my questions that I asked.He made me fill very comfortable about my health,with such positive vibes!!
Oct 12, 2026
Aimee C.
Oct 11, 2026
Michael B.
Oct 8, 2026
Ekua H.
Dr Castillo listens and remembers your history, is thorough and very knowledgeable. Has excellent bedside manner. He is a gem and I would recommend him to anyone looking for a skilled clinician.

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