Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

John Irvin Allen, MD

Individual provider Internal Medicine Physician · NPI 1154393502

John Irvin Allen, MD is an Internal Medicine Physician in Ann Arbor, Michigan. Licensed in Connecticut and Michigan. Registered with an NPI since 2006.

Licensed in
CT, MI
In the registry since
2006
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1500 E Medical Center Drive 3rd Fl Taubman Enter Recp D
Ann Arbor, MI 48109-5362
Phone: (734) 647-5944
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Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 4301110254 (MI)
Internal Medicine Physician Taxonomy 207R00000X · Licence 4301110254 (MI)
Gastroenterology Physician Taxonomy 207RG0100X · Licence 051552 (CT)

Record details

NPI number1154393502
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 1, 2006
Last updated in NPPESJanuary 21, 2019
Mailing address3621 S State St, Ann Arbor, MI 48108-1633

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