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

Michael Sullivan, MSW, LCSW

Clinical Social Worker in Billings, MT · enumerated 2007.

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

National Provider Identifier

1427240720

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Registry record

Entity type Individual (Type 1)
Name Michael Sullivan
Credential MSW, LCSW
Sex Male
Practice address Billings, MT, 59101
Phone (406) 245-4566
Enumeration date Aug 10, 2007
Last updated in NPPES Jul 10, 2018

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 192 (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
0501046 Medicaid MT -
7082-0 Other MT BLUE CROSS BLUE SHIELD

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

What is the NPI number for Michael Sullivan?
The National Provider Identifier (NPI) for Michael Sullivan is 1427240720, a Type 1 (individual) record in the CMS NPPES registry.
Where does Michael Sullivan practice?
The practice location on file with NPPES is in Billings, MT. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-07-10.