NPPES file of Aug 9, 2026

Rachel O'Sullivan, LCSW

Clinical Social Worker · Waukesha, WI

Rachel O'Sullivan, LCSW is a clinical social worker with a practice address in Waukesha, Wisconsin, and NPI 1659030393, issued on Dec 9, 2021. Check the license (Wisconsin 12716-123, as entered in NPPES) with the Wisconsin 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
1659030393
Name
Rachel O'Sullivan
Credential
LCSW
Primary taxonomy
Clinical Social Worker 1041C0700X
License number
12716-123 WI
Self-reported in NPPES; status is on the state search
Practice location
514 Riverview Ave, Waukesha, WI 53188
Phone
(262) 548-7666
Enumerated
Dec 9, 2021
Record last updated
Dec 9, 2025
Medicare enrollment
Enrolled (PECOS I20251219002730); accepts Medicare assignment
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 clinical social worker records → All 4,142 in Wisconsin → Look up another NPI →

Also registered at 514 Riverview Ave

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

  1. Emily Alexander, RNRegistered Nurse1992292478
  2. Penny AllarSocial Worker1750781159
  3. Allison AnschutzCase Manager/Care Coordinator1134760341
  4. Madeline AttewellCase Manager/Care Coordinator1548884752
  5. Lydia AukampCase Manager/Care Coordinator1194456111
  6. Joanne AyersCase Manager/Care Coordinator1003412016

Verify Rachel O'Sullivan in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
    Search for license 12716-123    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 Wisconsin 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 one group practice

  1. Vitae Health Medical Wisconsin LLCMayville, WI

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

Rachel O'Sullivan among 4,142 clinical social worker records in Wisconsin

Rachel O'Sullivan, LCSW is one of 4,142 clinical social worker records with a practice address in Wisconsin. 22% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 73% of them.

  • NPI issued2021 · 73% of these records are older, 23% newer
  • In a Medicare fileYes · 22% of these records are
  • In the CMS Doctors and Clinicians fileYes · 29% of these records are
  • Graduated2009 · median 2010 among the 1,186 with a school on file
  • Record last updated2025 · 52% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1041C0700X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

156 clinical social worker records list a practice address in Waukesha

They are 156 of the 2,814 NPPES records with a practice address in Waukesha, and 4,142 clinical social worker records in Wisconsin.

All 4,142 in Wisconsin → Every provider in Waukesha → Clinical Social Worker nationwide →

The 8 clinical social worker records with the nearest ZIP codes

  1. Marcia DegrothyWaukesha, WI 531881932268455
  2. Michael Demares, LCSWWaukesha, WI 531881942372131
  3. Erin Falk, MSW, LCSWWaukesha, WI 531881962425629
  4. Kimberley Fischer, LCSWWaukesha, WI 531881578554747
  5. Roberta Freitag, MAWaukesha, WI 531881366517922
  6. David Glick, MSWWaukesha, WI 531881992865760
  7. Trevor Huskey, LCSWWaukesha, WI 531881649387168
  8. Christel Kwiat, MSWWaukesha, WI 531881699841585

Common questions

What is Rachel O'Sullivan, LCSW's NPI number?

Rachel O'Sullivan, LCSW's National Provider Identifier (NPI) is 1659030393, issued on Dec 9, 2021. An NPI identifies a provider in billing; it is not a license.

Where is Rachel O'Sullivan, LCSW located?

The NPPES record lists a practice address at 514 Riverview Ave, Waukesha, WI, 53188. Phone: (262) 548-7666. Providers update this record themselves, so call before visiting.

How can I verify Rachel O'Sullivan, LCSW's license?

NPPES lists Wisconsin license number 12716-123, as entered by the provider. Search the Wisconsin 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.