Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Clearfield, DO

Family Medicine Physician in Sparks, NV · enumerated 2006.

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

National Provider Identifier

1437162864

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Registry record

Entity type Individual (Type 1)

Name William Clearfield

Credential DO

Sex Male

Practice address 1625 E Prater Way Ste 103, Sparks, NV, 89434

Phone (775) 750-2189

Fax (775) 358-6843

Enumeration date Aug 15, 2006

Last updated in NPPES Aug 26, 2013

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License OS004244L (PA) Secondary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License DO1474 (NV) Primary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 20A12513 (CA) Secondary

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
001135089	Medicaid	PA	-
404636	Other	NV	MEDICARE ID

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 is the NPI number for William Clearfield?

The National Provider Identifier (NPI) for William Clearfield is 1437162864, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Clearfield practice?

The practice location on file with NPPES is in Sparks, NV. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-08-26.