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

JOSIAH AN, MD

INTERNAL MEDICINE

Medical school: SOUTHERN ILLINOIS UNIVERSITY SCHOOL OF MEDICINE

Graduated: 2015

NPI: 1053791517

Practice Locations (2)

SOUTHERN CALIFORNIA PERMANENTE MEDICAL GROUP

9333 ROSECRANS AVE

BELLFLOWER, CA 907062141

5624613000

SOUTHERN CALIFORNIA PERMANENTE MEDICAL GROUP

9400 ROSECRANS AVE

BELLFLOWER, CA 907062246

5624613000

Source: CMS National Downloadable File, September 2026.

JOSIAH AN, MD | HealthCareAtlasUSA