Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark J Adair, PHD

Clinical Psychologist in Montpelier, VT · enumerated 2007.

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

National Provider Identifier

1245450568

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark J Adair

Credential PHD

Sex Male

Practice address 166 C Elm St, Montpelier, VT, 05602

Phone (802) 223-3958

Enumeration date Apr 27, 2007

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 0480000172 (VT) Secondary

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 0049131 (NY) Primary

102L00000X Psychoanalyst Behavioral Health & Social Service Providers Secondary

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

How do I verify Mark Adair's NPI record?

Cross-check NPI 1245450568 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1245450568 active?

Yes, as of the latest NPPES snapshot, NPI 1245450568 is active (record last updated 2025-09-11).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.