NPPES file of Aug 9, 2026

John Irvin Allen, MD

Gastroenterology Physician · Ann Arbor, MI

John Irvin Allen, MD is a gastroenterology physician with a practice address in Ann Arbor, Michigan, and NPI 1154393502, issued on Feb 1, 2006. Check the license (Michigan 4301110254, as entered in NPPES) on the Michigan Board of Medicine (LARA); the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1154393502
Name
John Irvin Allen
Credential
MD
Primary taxonomy
Gastroenterology Physician 207RG0100X
License numbers
4301110254 MI
051552 CT
Self-reported in NPPES; status is on the state search
Practice location
1500 East Medical Center Drive, Ann Arbor, MI 48109
Phone
(734) 647-5944
Enumerated
Feb 1, 2006
Record last updated
Jan 21, 2019 (not updated in 7 years: call before relying on the address or phone)
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

8 nearest gastroenterology physician records → All 550 in Michigan → Look up another NPI →

Also registered at 1500 East Medical Center Drive

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

  1. Mohannad AbusalemPediatric Gastroenterology Physician1265114938
  2. Allegra Adams, PTOrthopedic Physical Therapist1134621618
  3. Carol Adray, NPNurse Practitioner1841360179
  4. Megan Alderman, M.D.Anatomic Pathology Physician1164743704
  5. Anita Amin, M.D.Internal Medicine Physician1811127418
  6. Monee Amin, M.D.Internal Medicine Physician1356608038

Verify John Irvin Allen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
    Search for license 4301110254    Check 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.

Is this page about you? You can ask us to correct, restrict or remove it: how.

John Irvin Allen among 550 gastroenterology physician records in Michigan

John Irvin Allen, MD is one of 550 gastroenterology physician records with a practice address in Michigan. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 13% of them.

  • NPI issued2006 · 13% of these records are older, 50% newer
  • In a Medicare fileNo · 85% of these records are
  • In the CMS Doctors and Clinicians fileNo · 75% of these records are
  • Record last updated2019 · 52% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Gastroenterology Physician providers in Michigan

There are 550 gastroenterology physician records in Michigan. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 550 in Michigan → Every provider in Ann Arbor → Gastroenterology Physician nationwide →

The 8 gastroenterology physician records with the nearest ZIP codes

  1. Frederick Askari, MD, PHDAnn Arbor, MI 481091689756108
  2. Hari Conjeevaram, MDAnn Arbor, MI 481091831271360
  3. Grace Elta, MDAnn Arbor, MI 481091275615700
  4. Joseph Kolars, M.D.Ann Arbor, MI 481091447222005
  5. Hellan Kwon, MDAnn Arbor, MI 481091336152651
  6. Laurence McMahon, MDAnn Arbor, MI 481091417038647
  7. Stacy Menees, MDAnn Arbor, MI 481091508898081
  8. Mary Mortell, M.D.Ann Arbor, MI 481091851370142

Common questions

What is John Irvin Allen, MD's NPI number?

John Irvin Allen, MD's National Provider Identifier (NPI) is 1154393502, issued on Feb 1, 2006. An NPI identifies a provider in billing; it is not a license.

Where is John Irvin Allen, MD located?

The NPPES record lists a practice address at 1500 East Medical Center Drive, Ann Arbor, MI, 48109. Phone: (734) 647-5944. Providers update this record themselves, so call before visiting.

How can I verify John Irvin Allen, MD's license?

NPPES lists Michigan license number 4301110254, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. 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), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.