About

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

Dr. Castillo is the Director of Community Outreach and Diversity at our residency program and therefore it is important that the physicians he trains are mindful of social determinants of health, including socioeconomic status, education level, and health literacy. Being mindful of these variables ensures that all of our patients receive the quality health care that they deserve.

In his free time, Dr. Castillo loves singing and making music, cooking, trying new restaurants, trivia and crossword puzzles, and following his favorite bay area sports teams. He is also 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
(208 Ratings)
Feb 8, 2026
Patricia L.
Jan 29, 2026
Gloria S.
He is great doctor, honest, trustworthy & listen
Dec 5, 2025
Casto N.
Great listener and makes me feel very comfortable.
Dec 3, 2025
Joe R.
Nov 21, 2025
Robyn H.
Dr. Castillo is the best! He is very involved in my care and assists in providing me excellent recommendations for my continued wellness. I would recommend him to everyone.
Nov 21, 2025
Remegio G.
Very professional and explains the condition very well.
Nov 20, 2025
Jerlon B.
Excellent compassionate doctor
Oct 31, 2025
Gloria S.
Very professional
Oct 31, 2025
Motu K.
Every visit has been great with Dr. C, been under his care for a couple of years. Very professional and informative about my health needs.
Oct 15, 2025
Peter S.
He and his staff are the best people...give them all a raise.

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