Registry data as of Aug 27, 2026

Thomas Tietjen, M.D.

Gastroenterology Physician · Petoskey, MI

Thomas Tietjen, M.D. is a gastroenterology physician with a practice address in Petoskey, Michigan, and NPI 1861553026, issued on Dec 12, 2006. Check the license on the Michigan Board of Medicine; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, loaded Aug 27, 2026 · method · Verify with CMS →

NPPES recordas of Aug 27, 2026
1861553026
Name
Thomas Tietjen
Credential
M.D.
Primary taxonomy
Gastroenterology Physician 207RG0100X
Practice location
560 W Mitchell St, Petoskey, MI 49770
Phone
(231) 487-2391
Enumerated
Dec 12, 2006
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
Download card Updates feed

Also registered at 560 W Mitchell St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Sarah Adams, P.A.C.Medical Physician Assistant1568559383
  2. Chris Akins, MDThoracic Surgery (Cardiothoracic Vascular Surgery) Physician1164418026
  3. Ryan Ber, MDInterventional Cardiology Physician1811480627
  4. Kathy Berchem, RN MSN FNP BCNurse Practitioner1760659650
  5. Paul Blanchard, M.D.Internal Medicine Physician1588661086
  6. Daniel Buerkel, MDCardiovascular Disease Physician1417075987

Verify Thomas Tietjen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMichigan Board of MedicineCheck the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
Open the Michigan license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Gastroenterology Physician providers in Michigan

There are 390 gastroenterology physician records in Michigan. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 390 in Michigan → Every provider in Petoskey →

Other gastroenterology physician records in Michigan

  1. Amir Abadir, M.D.Lansing, MI1184050098
  2. Mohamed AbdallahRoyal Oak, MI1265966584
  3. Mohannad Abousaleh, MDYpsilanti, MI1265828115
  4. Megan Adams, MDAnn Arbor, MI1396973269
  5. Larry Adler, M.D.Ypsilanti, MI1356320634
  6. Nishant Aggarwal, MDRoyal Oak, MI1497327266
  7. Radhika Aggarwal, MDDetroit, MI1700084712
  8. Fariah Ahmad, MDLansing, MI1346770401
  9. Iftiker Ahmad, MDEast Lansing, MI1184673402
  10. Sumair Ahmad, MDDearborn, MI1609127109

Common questions

What is Thomas Tietjen, M.D.'s NPI number?

Thomas Tietjen, M.D.'s National Provider Identifier (NPI) is 1861553026, issued on Dec 12, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Thomas Tietjen, M.D. located?

The NPPES record lists a practice address at 560 W Mitchell St, Petoskey, MI, 49770. Phone: (231) 487-2391. Providers update this record themselves, so call before visiting.

How can I verify Thomas Tietjen, M.D.'s license?

Search the Michigan Board of Medicine at https://www.michigan.gov/lara/bureau-list/bpl/health/hp-lic-health-prof/medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Compiled from official public sources by the editorial process.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.