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
(210 Ratings)
Apr 10, 2026
Robert B.
If I could rate Dr Castillo 20/10 I would. He’s the most patient, down-to-earth primary care provider I’ve ever had! He listens and genuinely cares about his patients as a whole.
Apr 8, 2026
Matthew L.
Good communication and seems genuinely to care.
Apr 2, 2026
Ligaya C.
Mar 27, 2026
Nicholas G.
Mar 26, 2026
Sandra T.
Dr. Castillo is thorough, completely interested in my health and well being and caring!
Mar 18, 2026
Casto N.
He’s just great over all. I’m happy with him as my doctor.
Feb 27, 2026
Michael B.
Dr. C. Is incredible, interested, genuinely concerned about my health and the journey that I am taking to get my health on track. And he is a doctor that doesn’t sit and type on the computer while I am talking to him. To me that’s a very important distinction.Thank you Dr. C for all that you’ve done for me. I appreciate your concern and your speedy responses to accommodate my concerns.
Feb 25, 2026
Fiona B.
Kind, compassionate and very knowledgeable!
Feb 20, 2026
Meredith P.
Very professional, explains everything clearly.
Feb 19, 2026
Donald M.
Awesome human and great doctor.

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