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

WILLIAM V. HAHN, MD

GASTROENTEROLOGY

Medical school: UNIVERSITY OF WASHINGTON SCHOOL OF MEDICINE

Graduated: 1971

Also: INTERNAL MEDICINE

Offers telehealth

NPI: 1033227582

Practice Locations (1)

SANSUM CLINIC

317 W PUEBLO ST

SANTA BARBARA, CA 931054310

8056817500

Source: CMS National Downloadable File, September 2026.