Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Chet F Lesniak, PH.D.

Psychologist in Portsmouth, NH · enumerated 2007.

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

National Provider Identifier

1164575064

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Registry record

Entity type Individual (Type 1)

Name Dr. Chet F Lesniak

Credential PH.D.

Sex Male

Practice address Portsmouth, NH, 03801

Phone (603) 437-2069

Enumeration date Jan 22, 2007

Last updated in NPPES Jun 24, 2022

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

103TC2200X Clinical Child & Adolescent Psychologist Behavioral Health & Social Service Providers · License 999 (NH) Secondary

103TH0100X Health Service Psychologist Behavioral Health & Social Service Providers · License 011086 (NY) Secondary

103TH0100X Health Service Psychologist Behavioral Health & Social Service Providers · License 999 (NH) Secondary

103TM1800X Intellectual & Developmental Disabilities Psychologist Behavioral Health & Social Service Providers · License 999 (NH) Secondary

103T00000X Psychologist Behavioral Health & Social Service Providers · License 011086 (NY) Primary

103G00000X Clinical Neuropsychologist Behavioral Health & Social Service Providers · License 011086 (NY) Secondary

103G00000X Clinical Neuropsychologist Behavioral Health & Social Service Providers · License 999 (NH) Secondary

103T00000X Psychologist Behavioral Health & Social Service Providers · License 999 (NH) Secondary

103TA0700X Adult Development & Aging Psychologist Behavioral Health & Social Service Providers · License 011086 (NY) Secondary

103TA0700X Adult Development & Aging Psychologist Behavioral Health & Social Service Providers · License 999 (NH) Secondary

103TB0200X Cognitive & Behavioral Psychologist Behavioral Health & Social Service Providers · License 011086 (NY) Secondary

103TB0200X Cognitive & Behavioral Psychologist Behavioral Health & Social Service Providers · License 999 (NH) Secondary

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 011086 (NY) Secondary

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 999 (NH) Secondary

103TC2200X Clinical Child & Adolescent Psychologist Behavioral Health & Social Service Providers · License 011086 (NY) 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.

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Frequently asked questions

How do I verify Chet Lesniak's NPI record?

Cross-check NPI 1164575064 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1164575064 active?

Yes, as of the latest NPPES snapshot, NPI 1164575064 is active (record last updated 2022-06-24).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-06-24.