Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gregory A Thwaites, PHD

Clinical Neuropsychologist in Greeley, CO · enumerated 2006.

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

National Provider Identifier

1952345738

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Registry record

Entity type Individual (Type 1)

Name Gregory A Thwaites

Credential PHD

Sex Male

Practice address 2001 70th Ave, Greeley, CO, 80634

Phone (970) 392-2193

Fax (970) 392-2193

Enumeration date Jun 15, 2006

Last updated in NPPES Sep 24, 2010

Taxonomy & licenses

103G00000X Clinical Neuropsychologist Behavioral Health & Social Service Providers · License 2049 (CO) 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
07020498	Medicaid	CO	-

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 Thwaites?

The National Provider Identifier (NPI) for Gregory Thwaites is 1952345738, a Type 1 (individual) record in the CMS NPPES registry.

Where does Gregory Thwaites practice?

The practice location on file with NPPES is in Greeley, CO. 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 2010-09-24.