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
NEPHROLOGY
Graduated: 2000
NPI: 1225006349
ONG RUBIN SHAHMIR A MEDICAL CORPORATION
1411 OLIVER RD, SUITE 250
FAIRFIELD, CA 945343425
7074265407
Source: CMS National Downloadable File, September 2026.