NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William A. Cook, PH.D.

Counseling Psychologist in Butte, MT · enumerated 2006.

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

National Provider Identifier

1790726354

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name William A. Cook
Credential PH.D.
Sex Male
Practice address 125 W Granite St, Suite #206, Butte, MT, 59701
Fax (406) 563-5794
Enumeration date Jun 8, 2006
Last updated in NPPES Feb 3, 2010

Taxonomy & licenses

103TC1900X Counseling Psychologist Behavioral Health & Social Service Providers · License 309 (MT) Primary
PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

Other identifiers

Identifier Type State Issuer
490280 Medicaid MT -

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 Cook?
The National Provider Identifier (NPI) for William Cook is 1790726354, a Type 1 (individual) record in the CMS NPPES registry.
Where does William Cook practice?
The practice location on file with NPPES is in Butte, MT. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-02-03.