Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Jeffrey Robert Darnell, LCSW

Clinical Social Worker in Tomah, WI · enumerated 2006.

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

National Provider Identifier

1922063965

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Registry record

Entity type Individual (Type 1)

Name Mr. Jeffrey Robert Darnell

Credential LCSW

Sex Male

Practice address 500 E Veterans St, 425/7, Tomah, WI, 54660

Phone (800) 872-8662

Fax (608) 372-1779

Enumeration date Apr 20, 2006

Last updated in NPPES Apr 28, 2010

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 989488 (CO) Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 989488 (CO) Primary

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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Jeffrey Darnell?

Jeffrey Darnell is registered in NPPES with the primary taxonomy of Clinical Social Worker. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-04-28.