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Michael T. Callahan, PA-C

Physician Assistant in Saint Joseph, MI · enumerated 2007.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1891844148

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Registry record

Entity type Individual (Type 1)
Name Michael T. Callahan
Credential PA-C
Sex Male
Practice address 1234 Napier Ave, Saint Joseph, MI, 49085
Phone (269) 983-8264
Fax (269) 983-1238
Enumeration date Jan 9, 2007
Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 5601003934 (MI) Primary

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

How do I verify Michael Callahan's NPI record?
Cross-check NPI 1891844148 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1891844148 active?
Yes, as of the latest NPPES snapshot, NPI 1891844148 is active (record last updated 2007-07-08).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.