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 J RENNER, MD

FAMILY PRACTICE

Medical school: TUFTS UNIVERSITY SCHOOL OF MEDICINE

Graduated: 1988

Also: INTERNAL MEDICINE

Offers telehealth

NPI: 1669439733

Practice Locations (1)

JOHN MUIR PHYSICIAN NETWORK

5161 CLAYTON RD, SUITE F

CONCORD, CA 945213157

9256098282

Source: CMS National Downloadable File, September 2026.

CHARLES RENNER, MD | HealthCareAtlasUSA