NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Catherine Patricia Shamshak, LCMHC

Mental Health Counselor in Dover, NH · enumerated 2022 · practices at Northeast Tms, LLC.

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

National Provider Identifier

1366181661

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Registry record

Entity type Individual (Type 1)
Name Catherine Patricia Shamshak
Credential LCMHC
Sex Female
Practice address 16 Fifth St, Dover, NH, 03820
Phone (603) 883-0005
Enumeration date Jun 3, 2022
Last updated in NPPES May 16, 2025

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License 4789 (NH) Primary

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

Is NPI 1366181661 active?
Yes, as of the latest NPPES snapshot, NPI 1366181661 is active (record last updated 2025-05-16).
How do I verify Catherine Shamshak's NPI record?
Cross-check NPI 1366181661 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-05-16.