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

MICHAEL P KOUMJIAN, MD

CARDIAC SURGERY

Medical school: RUTGERS NEW JERSEY MEDICAL SCHOOL

Graduated: 1977

Also: THORACIC SURGERY, VASCULAR SURGERY

NPI: 1366403321

Practice Locations (2)

ON CALL SPECIALISTS MEDICAL GROUP OF SAN DIEGO INC

435 H ST

CHULA VISTA, CA 919104307

6193596600

28062 BAXTER RD

MURRIETA, CA 925631401

9512904000

Source: CMS National Downloadable File, September 2026.