Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William S Walker, NP

Family Nurse Practitioner in Washington, IN · enumerated 2005.

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

National Provider Identifier

1487640033

Verified

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Registry record

Entity type Individual (Type 1)

Name William S Walker

Credential NP

Sex Male

Practice address 1314 E Walnut St, Washington, IN, 47501

Phone (812) 473-2642

Enumeration date Sep 20, 2005

Last updated in NPPES Jun 27, 2024

Taxonomy & licenses

207XX0005X Sports Medicine (Orthopaedic Surgery) Physician Allopathic & Osteopathic Physicians · License 71001830A (IN) Secondary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 71001830A (IN) Primary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP credential

Other identifiers

Identifier	Type	State	Issuer
000000372944	Other	IN	ANTHEM
200520250A	Medicaid	IN	-

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

Where does William Walker practice?

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

What is the NPI number for William Walker?

The National Provider Identifier (NPI) for William Walker is 1487640033, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-06-27.