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
(203 Ratings)
Aug 4, 2026
Gary C.
Always listens and never rushes you away. Very thorough.
Aug 3, 2026
Andrew R.
He’s simply the best out there.
Jul 31, 2026
Cathy G.
Jul 31, 2026
Anonymous
Dr. Castillo is far and away the most caring and attentive doctor I have ever seen. He is the closest thing to the stereotypic family doctor from old movies and television, where I actually feel like he knows me and my family in a non-trivial way. It definitely feels like he actually cares about our health and wellness, not just that it's his job.
Jul 20, 2026
Adam S.
Jul 20, 2026
Joshua L.
Listens very well and friendly
Jun 25, 2026
Danilo G.
Best Doctor I ever has
Jun 25, 2026
Portia R.
Jun 25, 2026
Harold L.
It was a good visit got in fast it was good to see my Doc
Jun 22, 2026
Maya O.
He real professional

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