Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Russell Mcnair, FNP

Family Nurse Practitioner in San Luis, AZ · enumerated 2009.

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

National Provider Identifier

1780913236

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name William Russell Mcnair

Credential FNP

Sex Male

Practice address 1896 E. Babbit Ln, San Luis, AZ, 85349

Phone (928) 627-9222

Fax (928) 627-8315

Enumeration date Dec 11, 2009

Last updated in NPPES Aug 13, 2024

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License RN160158 (AZ) Primary

FNP · Family Nurse Practitioner: A nurse practitioner certified in family practice across the lifespan. About the FNP credential

Other identifiers

Identifier	Type	State	Issuer
503006	Medicaid	AZ	-
Z137149	Other	AZ	MEDICARE

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 Mcnair?

William Mcnair is registered in NPPES with the primary taxonomy of Family Nurse Practitioner. 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.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-08-13.