Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William F Tregaskis, PHD LP

Psychologist in Buffalo, MN · enumerated 2006 · practices at Central Minnesota Mental Health Center.

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

National Provider Identifier

1629008099

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Registry record

Entity type Individual (Type 1)

Name Dr. William F Tregaskis

Credential PHD LP

Sex Male

Practice address 308 12th Ave S, Buffalo, MN, 55313

Phone (763) 682-4400

Fax (763) 682-1353

Enumeration date Jul 3, 2006

Last updated in NPPES Jan 27, 2010

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License LP2432 (MN) Primary

Other identifiers

Identifier	Type	State	Issuer
922241022573	Other	-	PREFERRED ONE
5580TTR	Other	-	BCBS
765548700	Medicaid	MN	-
HP25574	Other	-	HEALTH PARTNERS
6110719	Other	-	MEDICA
110622C851	Other	-	UCARE

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

Where does William Tregaskis practice?

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

What is the NPI number for William Tregaskis?

The National Provider Identifier (NPI) for William Tregaskis is 1629008099, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-01-27.