Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Diane L Geisen, M.S.W., L.C.S.W.

Social Worker in Great Falls, MT · enumerated 2006.

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

National Provider Identifier

1619062049

Verified

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Registry record

Entity type Individual (Type 1)

Name Mrs. Diane L Geisen

Credential M.S.W., L.C.S.W.

Sex Female

Practice address 2211 5th Ave N, Great Falls, MT, 59401

Phone (406) 452-6655

Fax (406) 452-6561

Enumeration date Oct 3, 2006

Last updated in NPPES Mar 24, 2008

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 639 LCSW (MT) Primary

LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW credential

Other identifiers

Identifier	Type	State	Issuer
0503642	Medicaid	MT	-

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

Is NPI 1619062049 active?

Yes, as of the latest NPPES snapshot, NPI 1619062049 is active (record last updated 2008-03-24).

How do I verify Diane Geisen's NPI record?

Cross-check NPI 1619062049 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-03-24.