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

JOHN THOMAS HALLORAN, DO

INTERNAL MEDICINE

Graduated: 2018

NPI: 1851888697

Practice Locations (1)

COMMUNITY MEDICAL CENTERS, INC.

730 N CENTRAL AVE

TRACY, CA 953764104

2098504000

Source: CMS National Downloadable File, September 2026.

JOHN HALLORAN, DO | HealthCareAtlasUSA