Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Walker

Counselor in Saint Marys, OH · enumerated 2023.

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

National Provider Identifier

1639885114

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Registry record

Entity type Individual (Type 1)

Name William Walker

Sex Male

Practice address 720 Armstrong St, Saint Marys, OH, 45885

Phone (419) 300-7630

Enumeration date Jan 27, 2023

Last updated in NPPES Jan 27, 2023

Taxonomy & licenses

101Y00000X Counselor Behavioral Health & Social Service Providers · License C.2204538-TRNE (OH) Primary

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

What is the NPI number for William Walker?

The National Provider Identifier (NPI) for William Walker is 1639885114, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Walker practice?

The practice location on file with NPPES is in Saint Marys, OH. 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 2023-01-27.