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

SERGIO JOSE MARQUEZ, MD

EMERGENCY MEDICINE

Graduated: 2021

NPI: 1851967178

Practice Locations (2)

SINGH MD A PROFESSIONAL MEDICAL

820 E MOUNTAIN VIEW ST

BARSTOW, CA 923113004

8588637382

EM ALLIANCE CALIFORNIA APC

36485 INLAND VALLEY DR

WILDOMAR, CA 925959681

9516771111

Source: CMS National Downloadable File, September 2026.

SERGIO MARQUEZ, MD | HealthCareAtlasUSA