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

RALPH A KOO, MD

EMERGENCY MEDICINE

Medical school: UNIVERSITY OF SOUTH CAROLINA SCHOOL OF MEDICINE

Graduated: 1993

NPI: 1205932050

Practice Locations (2)

NORTHBAY PHYSICIANS SURGERY CENTER, LLC

1200 B GALE WILSON BLVD

FAIRFIELD, CA 945333552

7074293600

CEP AMERICA - CALIFORNIA

500 W HOSPITAL RD

FRENCH CAMP, CA 952319693

2094686000

Source: CMS National Downloadable File, September 2026.