About Me

Dr. Gregorio Abad-Santos finished his doctorate abroad at the University of the East in the Philippines. He underwent residency training at the Loma Linda University affiliated White Memorial Medical Center in Los Angeles. In his third year of residency, he served as Chief Resident in Pediatrics.

Dr. Abad-Santos has been a pediatrician in the Long Beach area since 1989 and joined Columbia Pediatrics in 1999. He is on staff at Miller Children's & Women's Hospital Long Beach. He is board certified in Pediatrics and feels privileged to serve the patients at Columbia Pediatrics.

Dr. Abad-Santos is married with four children. When time permits, he enjoys fishing and flying his model airplanes.



Provider Specialty



Locations & Affiliations


Gregorio D. Abad-Santos, MD

11100 Warner Ave. Suite 352

Fountain Valley, CA

Office: (714) 966-0860