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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mary C Whitmer, D.O.

Family Medicine Physician in Gladstone, MI · enumerated 2006 · practices at Transition Assisted Living, LLC.

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

National Provider Identifier

1609884436

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Registry record

Entity type Individual (Type 1)
Name Mary C Whitmer
Credential D.O.
Sex Female
Practice address 128 Michigan Ave, Gladstone, MI, 49837
Phone (906) 428-4084
Fax (906) 428-1881
Enumeration date Aug 4, 2006
Last updated in NPPES Jan 22, 2009

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 5101009009 (MI) Primary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier Type State Issuer
3177829 Medicaid MI -
080017993 Other MI RR MEDICARE GROUP#CC2139

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 Mary Whitmer's NPI record?
Cross-check NPI 1609884436 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1609884436 active?
Yes, as of the latest NPPES snapshot, NPI 1609884436 is active (record last updated 2009-01-22).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-01-22.