Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gregory S Cowan, PHD

Clinical Psychologist in Wausau, WI · enumerated 2006.

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

National Provider Identifier

1235166828

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Registry record

Entity type Individual (Type 1)

Name Gregory S Cowan

Credential PHD

Sex Male

Practice address 425 Wind Ridge Dr, Wausau, WI, 54401

Phone (715) 675-3391

Fax (715) 675-5255

Enumeration date Jun 27, 2006

Last updated in NPPES Apr 27, 2009

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 2343 (WI) Primary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

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 Gregory Cowan?

The National Provider Identifier (NPI) for Gregory Cowan is 1235166828, a Type 1 (individual) record in the CMS NPPES registry.

Where does Gregory Cowan practice?

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

Other providers at this practice address

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University of Wisconsin Medical Foundation Durable Medical Equipment & Medical Supplies · Wausau, WI NPI 1154381978 Thomas Strick Family Medicine Physician · Wausau, WI NPI 1427098706 Charles Shabino Pediatrics Physician · Wausau, WI NPI 1760418883 Lynn Buhmann Family Nurse Practitioner · Wausau, WI NPI 1992731442 Kevin O'Connell Family Medicine Physician · Wausau, WI NPI 1194755702 David Jenkins Family Medicine Physician · Wausau, WI NPI 1831129444 Kathryn Krohn-Gill Family Medicine Physician · Wausau, WI NPI 1336243526 Gregory Gill Family Medicine Physician · Wausau, WI NPI 1922109784

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-04-27.