HealthCareAtlasUSA

This site republishes official CMS/Medicare Care Compare data. It is not medical advice and does not recommend any specific hospital or treatment — for medical decisions, talk to a doctor.

Doctors / CA

DEREK D MAFONG, MD

ENDOCRINOLOGY

Medical school: UNIVERSITY OF CALIFORNIA, SAN FRANCISCO SCHOOL OF MEDICINE

Graduated: 2001

Also: INTERNAL MEDICINE

NPI: 1699781633

Practice Locations (3)

SOUTHERN CALIFORNIA PERMANENTE MEDICAL GROUP

3955 BONITA RD

BONITA, CA 919021230

6195285000

SOUTHERN CALIFORNIA PERMANENTE MEDICAL GROUP

3851 SHAW RIDGE RD

SAN DIEGO, CA 921302807

6195285000

SOUTHERN CALIFORNIA PERMANENTE MEDICAL GROUP

4647 ZION AVE

SAN DIEGO, CA 921202507

6195285000

Source: CMS National Downloadable File, September 2026.

DEREK MAFONG, MD | HealthCareAtlasUSA