NPPES file of Aug 9, 2026

Brittany Ann Thammavongkeo, LCSW, CAC

Social Worker · Sioux Falls, SD

Brittany Ann Thammavongkeo, LCSW, CAC is a social worker with a practice address in Sioux Falls, South Dakota, and NPI 1992406011, issued on Mar 15, 2023. Check the license (South Dakota 6322, as entered in NPPES) with the South Dakota board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1992406011
Name
Brittany Ann Thammavongkeo
Credential
LCSW, CAC
Primary taxonomy
Social Worker 104100000X
License numbers
6322 SD
14091672 SD
Self-reported in NPPES; status is on the state search
Practice location
521 N Main Ave, Sioux Falls, SD 57104
Phone
(605) 367-8793
Enumerated
Mar 15, 2023
Record last updated
Mar 15, 2023
Medicare enrollment
Enrolled (PECOS I20230419002772); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest social worker records → All 234 in South Dakota → Look up another NPI →

Also registered at 521 N Main Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Elizabeth BrownAddiction (Substance Use Disorder) Counselor1063183408
  2. Sarah Fuerstenberg, CNPPrimary Care Nurse Practitioner1508341678
  3. Dale JohnsonGeneral Practice Dentistry1871681825
  4. Lonna JonesDental Hygienist1720176787
  5. Whitney Larsen, CNPNurse Practitioner1013358092
  6. Joseph McNish, DDSDentist1255060083

Verify Brittany Ann Thammavongkeo in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich South Dakota board licenses this profession
    Search for license 6322    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the South Dakota license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through 3 group practices

  1. Behavior Management Systems IncRapid City, SD
  2. City OF Sioux FallsSioux Falls, SD
  3. Turnwell Mental Health OF South Dakota, PCSioux Falls, SD

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Brittany Ann Thammavongkeo among 234 social worker records in South Dakota

Brittany Ann Thammavongkeo, LCSW, CAC is one of 234 social worker records with a practice address in South Dakota. 14% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 61% of them.

  • NPI issued2023 · 61% of these records are older, 29% newer
  • In a Medicare fileYes · 14% of these records are
  • In the CMS Doctors and Clinicians fileYes · 22% of these records are
  • Graduated2021 · median 2020 among the 51 with a school on file
  • Record last updated2023 · 40% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 104100000X and a South Dakota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

90 social worker records list a practice address in Sioux Falls

They are 90 of the 6,563 NPPES records with a practice address in Sioux Falls, and 234 social worker records in South Dakota.

All 234 in South Dakota → Every provider in Sioux Falls → Social Worker nationwide →

The 8 social worker records with the nearest ZIP codes

  1. Collin Block, MSWSioux Falls, SD 571041982231510
  2. Morgan Engelbrecht, LCSWSioux Falls, SD 571041073236329
  3. Jacklyn Genzlinger, MSW, LCSWSioux Falls, SD 571041548733116
  4. Sarajo Kegler, LCSW LACSioux Falls, SD 571041487368171
  5. Ella Lueders, LCSWSioux Falls, SD 571041730996034
  6. Mari Mehlbrech, LCSWSioux Falls, SD 571041205603156
  7. Katherine Phillips Olson, MSW, CSW-PIPSioux Falls, SD 571041982199535
  8. Jennifer Prouty, MSWSioux Falls, SD 571041134619596

Common questions

What is Brittany Ann Thammavongkeo, LCSW, CAC's NPI number?

Brittany Ann Thammavongkeo, LCSW, CAC's National Provider Identifier (NPI) is 1992406011, issued on Mar 15, 2023. An NPI identifies a provider in billing; it is not a license.

Where is Brittany Ann Thammavongkeo, LCSW, CAC located?

The NPPES record lists a practice address at 521 N Main Ave, Sioux Falls, SD, 57104. Phone: (605) 367-8793. Providers update this record themselves, so call before visiting.

How can I verify Brittany Ann Thammavongkeo, LCSW, CAC's license?

NPPES lists South Dakota license number 6322, as entered by the provider. Search the South Dakota board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.