Michele Marie Mastalarz, MSW, LCSW
Clinical Social Worker · Milwaukee, WI
Michele Marie Mastalarz, MSW, LCSW is a clinical social worker with a practice address in Milwaukee, Wisconsin, and NPI 1851668669, issued on Nov 22, 2011. Check the license (Wisconsin 8124-123, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Michele Marie Mastalarz
- Credential
- MSW, LCSW
- Primary taxonomy
- Clinical Social Worker 1041C0700X
- License numbers
- 8124-123 WI
128508-121 WI
Self-reported in NPPES; status is on the state search - Practice location
- 207 E Buffalo St, Milwaukee, WI 53202
- Phone
- (262) 375-1116
- Enumerated
- Nov 22, 2011
- Record last updated
- Mar 29, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (262) 375-1071
- Medicare enrollment
- Enrolled (PECOS I20180305000100); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest clinical social worker records → All 4,142 in Wisconsin → Look up another NPI →
Also registered at 207 E Buffalo St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Janet Fritts, L. AC.Acupuncturist1760522197
- Grace Jessen, LCSWClinical Social Worker1306954920
- Carol Justin, LCSWClinical Social Worker1861548141
Verify Michele Marie Mastalarz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 8124-123Check 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 MIPS final score for 2023 (Medicare payment program): 75.8 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).
Bills Medicare through one group practice
- Columbia St Marys Hospital Milwaukee IncMilwaukee, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michele Marie Mastalarz among 4,142 clinical social worker records in Wisconsin
Michele Marie Mastalarz, MSW, 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 2011, is newer than 41% of them.
- NPI issued2011 · 41% of these records are older, 56% newer
- In a Medicare fileYes · 22% of these records are
- In the CMS Doctors and Clinicians fileYes · 29% of these records are
- Graduated2010 · median 2010 among the 1,186 with a school on file
- Record last updated2014 · 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).
608 clinical social worker records list a practice address in Milwaukee
They are 608 of the 18,389 NPPES records with a practice address in Milwaukee, and 4,142 clinical social worker records in Wisconsin.
All 4,142 in Wisconsin → Every provider in Milwaukee → Clinical Social Worker nationwide →
The 8 clinical social worker records with the nearest ZIP codes
- Mary Jo Caminiti, ACSWMilwaukee, WI 532021760415160
- Susan Dellutri, LCSW, LMFT, CSACMilwaukee, WI 532021689789851
- Mary Jane Demet, MSW, LCSWMilwaukee, WI 532021841219169
- Grace Jessen, LCSWMilwaukee, WI 532021306954920
- Jane Kelley, LCSWMilwaukee, WI 532021689680860
- Michael Matthias, LCSWMilwaukee, WI 532021417991936
- Patricia Miller, LCSWMilwaukee, WI 532021598872087
- Joelle Ottoson, MSW, LCSW, ICS,CSACMilwaukee, WI 532021679591416
Common questions
What is Michele Marie Mastalarz, MSW, LCSW's NPI number?
Michele Marie Mastalarz, MSW, LCSW's National Provider Identifier (NPI) is 1851668669, issued on Nov 22, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Michele Marie Mastalarz, MSW, LCSW located?
The NPPES record lists a practice address at 207 E Buffalo St, Milwaukee, WI, 53202. Phone: (262) 375-1116. Providers update this record themselves, so call before visiting.
How can I verify Michele Marie Mastalarz, MSW, LCSW's license?
NPPES lists Wisconsin license number 8124-123, as entered by the provider. Search the Wisconsin board that licenses this profession; the NPPES record confirms identity only.
What is Michele Marie Mastalarz, MSW, LCSW's MIPS final score?
The 2023 MIPS final score is 75.8 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), 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.
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.