Ann Brownback, LCSW

Primary specialty

Clinical Social WorkerTaxonomy code 1041C0700X

License

338LCSW Issued in MT

Practice address

415 Louisiana Ave
Libby, MT 59923-2131

Phone

(406) 293-4329

Fax

(406) 293-5336

NPI assigned

Jun 11, 2006

Sex

Female

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Addresses

Other identifiers 2

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

HHS exclusion list flag

Flagged The directory lists this NPI on an HHS exclusion list. Confirm with the OIG exclusions search.

State licenses

Practice roles

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• Mavis Vaillancourt LCSW Lac LLC

  • Mental Health Clinic/Center (Including Community Mental Health Center)
  • Libby, MT
  • NPI 1699229682
  NPD (past)

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1149984000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1376585737",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "415 LOUISIANA AVE",
            "city": "LIBBY",
            "state": "MT",
            "postal_code": "599232131",
            "telephone_number": "406-293-4329",
            "fax_number": "406-293-5336"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "415 LOUISIANA AVE",
            "city": "LIBBY",
            "state": "MT",
            "postal_code": "599232131",
            "telephone_number": "406-293-4329",
            "fax_number": "406-293-5336"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "BROWNBACK",
        "first_name": "ANN",
        "credential": "LCSW",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2006-06-11",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "1041C0700X",
            "taxonomy_group": "",
            "desc": "Social Worker, Clinical",
            "state": "MT",
            "license": "338LCSW",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "0000502840",
            "state": "MT"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BLUE CROSS BLUE SHIELD",
            "identifier": "000007076-1",
            "state": "MT"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Jenna Bradford, PT, DPT
• Michael Frank Breslow, M.D.
• David Allen Bristol, R.PH.
• Jeffrey William Brown, PHD
• Jesse Thomas Brown, PA-C
• Brandon James Burke, D.D.S.
• Cabinet Mountain Home Care, LLC
• Cabinet View Fire Department
• Emilie Lillian Marguerite Campbell, FNP
• Mary Karen Caraway, LCSW

• All providers in Libby, MT
• Clinical Social Worker in Montana

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.