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 / OH

JOHN WILLIAM BARNHART, OD

OPTOMETRY

Medical school: OHIO STATE UNIVERSITY - COLLEGE OF OPTOMETRY

Graduated: 1991

NPI: 1407975113

Practice Locations (1)

4620 MAHONING AVE NW

WARREN, OH 444831419

3308479093

Source: CMS National Downloadable File, September 2026.

JOHN BARNHART, OD | HealthCareAtlasUSA