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

CHARLES CHANG, MD

UROLOGY

Graduated: 2008

Offers telehealth

NPI: 1942436886

Practice Locations (1)

JOHN MUIR PHYSICIAN NETWORK

2222 E ST, SUITE 250

CONCORD, CA 945202096

9256097220

Source: CMS National Downloadable File, September 2026.

CHARLES CHANG, MD | HealthCareAtlasUSA