About Me

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.



Provider Specialty

Family Medicine, Primary Care

Areas of Care


Medical Education

Touro University California


Long Beach Medical Center Family Medicine Residency Program

Locations & Affiliations


MemorialCare Family Medicine Residency - Long Beach

450 East Spring Street

Suite 1

Long Beach, CA

Office: (562) 933-0050

Insurances Accepted

Aetna Whole Health ACO
Boeing MemorialCare Health Alliance ACO
Aetna PPO
Anthem PPO
Blue Shield PPO
Cigna PPO
Health Net PPO
Humana PPO
United HealthCare PPO
TriCare West(HN)/TriWest Healthcare(BSC)
Aetna Commercial HMO
Anthem Commercial HMO
BlueShield Commercial HMO
Cigna Commercial HMO
Health Net Commercial HMO
UHC Commercial HMO
Anthem Vivity HMO
BlueShield Trio Commercial HMO
Aetna Medicare Advantage HMO
BlueShield Medicare Advantage HMO
Health Net Medicare Advantage HMO
Humana Medicare Advantage HMO
SCAN Medicare Advantage HMO
UHC AARP Medicare Advantage HMO
Alignment Medicare Advantage HMO
Centivo ACO
Primary Care First ACO
Anthem Pathway HMO
Cigna Value/Select HMO
UHC Harmony Commercial HMO
Clever Care Medicare Advantage HMO