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

OSCAR L CHIEN, MD

INTERNAL MEDICINE

Graduated: 1990

Also: GERIATRIC MEDICINE

NPI: 1679675904

Practice Locations (2)

1448 S SAN GABRIEL BL

SAN GABRIEL, CA 917763656

1448 S SAN GABRIEL BLVD

SAN GABRIEL, CA 917763656

6265692888

Source: CMS National Downloadable File, September 2026.

OSCAR CHIEN, MD | HealthCareAtlasUSA