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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 (2)

The overall average patient rating of Dr. Stanley Hahn, Surgeon, Gastroenterologist is Good. Dr. Hahn has been reviewed by 10 patients who have provided 2 comments. The rating is 4 out of 5 stars.

Patient Ratings
Ease of Appointment 4.0
Promptness 5.0
Courteous Staff 5.0
Accurate Diagnosis 5.0
Bedside Manner 5.0
Spends Time with Me 5.0
Follows Up After Visit 5.0

Specialties & Research

Dr. Stanley Hahn, MD is board certified in Surgery.

  • He has special expertise in 3 areas:
  • Gastric Bypass (Gastrojejunostomy)
  • Stomach Stapling (Gastroplasty)
  • Weight Loss Surgery (Bariatric Surgery)

Education & Awards

Dr. Hahn graduated from University of Iowa, Iowa City.


Dr. Hahn has 4 hospital affiliations:

  • Hancock County Memorial Hospital 
  • Mercy Medical Center - North Iowa 

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Additional Information
Dr. Stanley Hahn MD is a male Surgeon and practices in Surgery.
Where does Dr. Stanley Hahn practice?
Dr. Stanley Hahn has 4 office locations.
Dr. Stanley Hahn practices Surgery near Mason City, IA.
Additional practice locations include: Marshfield, WI.
See Mason City Surgeons.