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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).

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Dr. Thieszen has 4 hospital affiliations:

  • Vail Valley Medical Center 
  • The Memorial Hospital-Craig 


  • English

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Additional Information
Dr. John Michael Thieszen MD is a male doctor and practices in Hospitalist.
Where does Dr. John M. Thieszen practice?
Dr. John Thieszen has 3 office locations.
Dr. John Thieszen practices Hospitalist near Vail, CO.
Additional practice locations include: Craig, CO and Billings, MT.
See Vail Hospitalists.