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 P WILLIAMS, DO

INTERNAL MEDICINE

Medical school: UNIVERSITY OF NEW ENGLAND, COLLEGE OF OSTEO MEDICINE

Graduated: 1989

Also: OSTEOPATHIC MANIPULATIVE MEDICINE

NPI: 1144220369

Practice Locations (2)

1162 S DORA ST

UKIAH, CA 954826340

7074595585

1772 S MAIN ST

WILLITS, CA 954904435

7074595585

Source: CMS National Downloadable File, September 2026.