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41 years of experience
Accepting new patients
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 (0)

The overall average patient rating of Dr. William Hahn, Gastroenterologist, is Excellent. Dr. Hahn has been reviewed by 1 patients who have provided 0 comments. The rating is 5 out of 5 stars.

Specialties & Research

Dr. William Hahn, MD is board certified in Gastroenterology.

  • He has special expertise in 5 areas:
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Constipation
  • Hepatitis C
  • Irritable Bowel Syndrome (IBS)
  • Ulcerative Colitis

Education & Awards

Dr. Hahn graduated from University of Washington, Seattle.


Dr. Hahn has 3 hospital affiliations:

  • Santa Barbara Cottage Hospital 
  • Santa Ynez Valley Cottage Hospital 
  • Goleta Valley Cottage Hospital 

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Additional Information
Dr. William V Hahn MD is a male Internist, has 41 years of experience and practices in Gastroenterology.
Where does Dr. William V. Hahn practice?
Dr. William Hahn has 2 office locations.
Dr. William Hahn practices Gastroenterology near Santa Barbara, CA.
See Santa Barbara Gastroenterologists.