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

Mr. Michael E Larsen, LCSW

Clinical Social Worker in Marshall, MO · enumerated 2007.

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

National Provider Identifier

1891999264

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Mr. Michael E Larsen

Credential LCSW

Sex Male

Practice address Marshall, MO, 65340

Phone (660) 815-2520

Fax (660) 886-6658

Enumeration date Jun 12, 2007

Last updated in NPPES Feb 12, 2011

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

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 2004035780 (MO) 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
498373901	Medicaid	MO	-
2004035780	Other	MO	STATE LICENSE #

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

What is the NPI number for Michael Larsen?

The National Provider Identifier (NPI) for Michael Larsen is 1891999264, a Type 1 (individual) record in the CMS NPPES registry.

Where does Michael Larsen practice?

The practice location on file with NPPES is in Marshall, MO. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-02-12.