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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Cecilia Cassidy Lenahan, LCPC, LAC

Addiction (Substance Use Disorder) Counselor in Great Falls, MT · enumerated 2015.

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

National Provider Identifier

1659767580

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Registry record

Entity type Individual (Type 1)
Name Ms. Cecilia Cassidy Lenahan
Credential LCPC, LAC
Sex Female
Practice address 510 1st Ave N, Great Falls, MT, 59401
Phone (406) 454-6973
Fax (406) 791-9277
Enumeration date Apr 7, 2015
Last updated in NPPES Apr 13, 2026

Taxonomy & licenses

101YP2500X Professional Counselor Behavioral Health & Social Service Providers · License BBH-LCPC-LIC-81696 (MT) Secondary
101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License BBH-LAC-LIC-4258 (MT) Primary
LAC · Licensed Acupuncturist: A practitioner licensed to perform acupuncture. About the LAC 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 Cecilia Lenahan's NPI record?
Cross-check NPI 1659767580 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1659767580 active?
Yes, as of the latest NPPES snapshot, NPI 1659767580 is active (record last updated 2026-04-13).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-13.