Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William H Mcnamara, M.D.

Family Medicine Physician in Grayling, MI · enumerated 2005 · practices at Grayling Family Practice Clinic.

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

National Provider Identifier

1952398638

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Registry record

Entity type Individual (Type 1)

Name Dr. William H Mcnamara

Credential M.D.

Sex Male

Practice address 1010 W North Down River Rd, Grayling, MI, 49738

Phone (989) 348-7671

Fax (989) 348-8414

Enumeration date Sep 29, 2005

Last updated in NPPES Aug 27, 2010

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License WM046962 (MI) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
3047520	Medicaid	MI	-
WM046962	Other	MI	STATE LICENSE

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is William Mcnamara?

William Mcnamara is registered in NPPES with the primary taxonomy of Family Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-08-27.