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

MARK STEPHEN SINGER, MD

INTERNAL MEDICINE

Medical school: UNIVERSITY OF CALIFORNIA, GEFFEN SCHOOL OF MEDICINE

Graduated: 1983

Also: EMERGENCY MEDICINE

NPI: 1962486332

Practice Locations (1)

3334 STERLING CT

NAPA, CA 945584262

7073655151

Source: CMS National Downloadable File, September 2026.

MARK SINGER, MD | HealthCareAtlasUSA