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

BRANDON SCOTT ROMO JOHNSTON, MD

INTERNAL MEDICINE

Graduated: 2021

NPI: 1619555885

Practice Locations (4)

QUANTUM HEALTHCARE MEDICAL ASSOCIATES INC

400 N PEPPER AVE

COLTON, CA 923241801

9095801000

CLINIC SERVICES OF CALIFORNIA MEDICAL GROUP INC

400 N PEPPER AVE

COLTON, CA 923241801

9095801000

SOUTHERN CALIFORNIA PERMANENTE MEDICAL GROUP

9961 SIERRA AVE

FONTANA, CA 923356720

9094275000

SOUTHERN CALIFORNIA PERMANENTE MEDICAL GROUP

2295 S VINEYARD AVE

ONTARIO, CA 917617925

9097245000

Source: CMS National Downloadable File, September 2026.

BRANDON JOHNSTON, MD | HealthCareAtlasUSA