Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William Bentley Nash, PH.D.

Psychologist in Williston, VT · enumerated 2006.

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

National Provider Identifier

1689639742

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Registry record

Entity type Individual (Type 1)

Name Dr. William Bentley Nash

Credential PH.D.

Sex Male

Practice address 4185 St George Rd, Williston, VT, 05495

Phone (802) 651-7735

Fax (802) 879-5335

Enumeration date Apr 19, 2006

Last updated in NPPES Jul 9, 2007

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License 048-00421 (VT) 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
1002474	Medicaid	VT	—

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

How do I verify William Nash's NPI record?

Cross-check NPI 1689639742 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1689639742 active?

Yes — as of the latest NPPES snapshot, NPI 1689639742 is active (record last updated 2007-07-09).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.