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

JASON J AHN, MD

EMERGENCY MEDICINE

Medical school: HARVARD MEDICAL SCHOOL

Graduated: 2012

NPI: 1851667299

Practice Locations (2)

NORTHBAY PHYSICIANS SURGERY CENTER, LLC

1200 B GALE WILSON BLVD

FAIRFIELD, CA 945333552

7074293600

EMERGENCY PHYSICIANS ASSOCIATES FREMONT PC

2000 MOWRY AVE

FREMONT, CA 945381716

5107971111

Source: CMS National Downloadable File, September 2026.

JASON AHN, MD | HealthCareAtlasUSA