NPI Portal NPI Lookup & Verification

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

Ms. Mary Jo Barrett, M.S.W.

Clinical Social Worker in Missoula, MT · enumerated 2007.

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

National Provider Identifier

1134348642

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Registry record

Entity type Individual (Type 1)
Name Ms. Mary Jo Barrett
Credential M.S.W.
Sex Female
Practice address Missoula, MT, 59802
Phone (406) 829-1300
Fax (406) 829-1400
Enumeration date Apr 24, 2007
Last updated in NPPES Dec 3, 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 559 (MT) Primary

Other identifiers

Identifier Type State Issuer
000050182 Other MT MEDICARE PTAN
501993 Medicaid MT -
71423 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 Mary Barrett?
The National Provider Identifier (NPI) for Mary Barrett is 1134348642, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mary Barrett practice?
The practice location on file with NPPES is in Missoula, 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 2011-12-03.