Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Diane C Garrison, PHD

Clinical Psychologist in Pewaukee, WI · enumerated 2007.

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

National Provider Identifier

1427115716

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Registry record

Entity type Individual (Type 1)

Name Dr. Diane C Garrison

Credential PHD

Sex Female

Practice address 325 Forest Grove Dr, Suite 201, Pewaukee, WI, 53072

Phone (262) 547-9673

Fax (262) 549-5107

Enumeration date Jan 3, 2007

Last updated in NPPES Jul 18, 2008

Taxonomy & licenses

103TA0400X Addiction (Substance Use Disorder) Psychologist Behavioral Health & Social Service Providers · License 2274-057 (WI) Secondary

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 2274-057 (WI) Primary

103T00000X Psychologist Behavioral Health & Social Service Providers · License 2274-057 (WI) Secondary

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
39146400	Medicaid	WI	-

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 specialty is Diane Garrison?

Diane Garrison is registered in NPPES with the primary taxonomy of Clinical Psychologist. 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-07-18.