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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 (3)

The overall average patient rating of Dr. Thomas Tietjen is Excellent. Dr. Tietjen has been reviewed by 7 patients who have provided 3 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 3.7
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. Thomas Tietjen, 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. Tietjen graduated from University of Missouri at Kansas City. He has 2 awards.

Alpha Omega Alpha
Fellow American College of Physicians


Dr. Tietjen has 3 hospital affiliations:

  • Cheboygan Memorial Hospital 
  • Otsego Memorial Hospital 
  • Northern Michigan Regional Hospital 

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Additional Information
Dr. Thomas Tietjen MD is a male Internist, has 25 years of experience and practices in Gastroenterology.
Where does Dr. Thomas Tietjen practice?
Dr. Thomas Tietjen has 1 office location.
Dr. Thomas Tietjen practices Gastroenterology near Petoskey, MI.
See Petoskey Gastroenterologists.