Mavis Vaillancourt, LCSW, LAC
Clinical Social Worker · Libby, MT
Mavis Vaillancourt, LCSW, LAC is a clinical social worker with a practice address in Libby, Montana, and NPI 1134139058, issued on Aug 9, 2006. Check the license (Montana 912, as entered in NPPES) with the Montana board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mavis Vaillancourt
- Credential
- LCSW, LAC
- Primary taxonomy
- Clinical Social Worker 1041C0700X
- License numbers
- 912 MT
1140 MT
Self-reported in NPPES; status is on the state search - Practice location
- 415 Louisiana Ave, Libby, MT 59923
- Phone
- (406) 546-8507
- Enumerated
- Aug 9, 2006
- Entity
- Type 1 · individual
Also registered at 415 Louisiana Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ann Brownback, LCSWClinical Social Worker1376585737
Verify Mavis Vaillancourt in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Montana board licenses this profession
Search for license 912Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
The practice group's Medicare quality score for 2023: 89.8 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
14 clinical social worker records list a Libby practice address
They are 14 of the 139 NPPES records with a Libby practice address, and 1,428 clinical social worker records in Montana.
All 14 in Libby → All 1,428 in Montana → Every provider in Libby →
Other clinical social worker records in Montana
- Maria Isabel AbbitHelena, MT1427927128
- Shawn Abbott, LCSWGreat Falls, MT1316900368
- Emily AertsBillings, MT1154894186
- Roula Agne, LCSWMissoula, MT1285057232
- Kristin Airhart, LCSWMissoula, MT1285895839
- Russell Akard, LCSWBillings, MT1699623777
- Shaunda Albert, LAC, MAC, LCSWPolson, MT1912407198
- James Alcoke, LCSWBozeman, MT1174287544
- Daisy AlexanderMissoula, MT1336941558
- Tammy Ali-Carr, LCSWMalmstrom Afb, MT1992353759
Common questions
What is Mavis Vaillancourt, LCSW, LAC's NPI number?
Mavis Vaillancourt, LCSW, LAC's National Provider Identifier (NPI) is 1134139058, issued on Aug 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mavis Vaillancourt, LCSW, LAC located?
The NPPES record lists a practice address at 415 Louisiana Ave, Libby, MT, 59923. Phone: (406) 546-8507. Providers update this record themselves, so call before visiting.
How can I verify Mavis Vaillancourt, LCSW, LAC's license?
NPPES lists Montana license number 912, as entered by the provider. Search the Montana board that licenses this profession; the NPPES record confirms identity only.
What is Mavis Vaillancourt, LCSW, LAC's Medicare quality score?
The 2023 MIPS final score is 89.8 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.