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License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Patient Reviews

Patient comments (2)

The overall average patient rating of Dr. Charles Renner is Excellent. Dr. Renner has been reviewed by 7 patients who have provided 2 comments. The rating is 5 out of 5 stars.

Patient Ratings
Ease of Appointment 4.8
Promptness 4.8
Courteous Staff 5.0
Accurate Diagnosis 5.0
Bedside Manner 4.8
Spends Time with Me 5.0
Follows Up After Visit 4.6

Specialties & Research

Dr. Charles Renner, MD is board certified in Family Medicine.

Education & Awards

Dr. Renner graduated from Tufts University, Boston. He has 2 awards.

Patients' Choice Award (2010 - 2012)
Compassionate Doctor Recognition (2011 - 2012)


Dr. Renner has 4 hospital affiliations:

  • John Muir Medical Center, Concord Campus 
  • John Muir Medical Center, Walnut Creek Campus 

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Additional Information
Dr. Charles Joseph Renner MD is a male Family Practitioner, has 23 years of experience and practices in Family Medicine.
Where does Dr. Charles J. Renner practice?
Dr. Charles Renner has 2 office locations.
Dr. Charles Renner practices Family Medicine near Concord, CA.
See Concord Primary Care Doctors.