NPPES file of Aug 9, 2026

Katelyn Marie Ryan Mazeika, MSW, CAPSW, CBIS

Social Worker · Milwaukee, WI

Katelyn Marie Ryan Mazeika, MSW, CAPSW, CBIS is a social worker with a practice address in Milwaukee, Wisconsin, and NPI 1457709909, issued on May 25, 2016. Check the license (Wisconsin 129421, as entered in NPPES) with the Wisconsin board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

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

NPPES recordNPPES file of Aug 9, 2026
1457709909
Name
Katelyn Marie Ryan Mazeika
Credential
MSW, CAPSW, CBIS
Primary taxonomy
Social Worker 104100000X
License numbers
129421 WI
24914 MN
940710 MN
Self-reported in NPPES; status is on the state search
Practice location
945 N 12TH St, Milwaukee, WI 53233
Phone
(651) 271-6738
Enumerated
May 25, 2016
Record last updated
May 25, 2016 (not updated in 10 years: call before relying on the address or phone)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest social worker records → All 1,915 in Wisconsin → Look up another NPI →

Also registered at 945 N 12TH St

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

  1. Ahmed Abdelmagid, M.D.Critical Care Medicine (Internal Medicine) Physician1144589383
  2. Mohammad Abdul AzeemNeurology Physician1295229797
  3. Ibrahim Abu-ArqoubPharmacist1033539390
  4. Stephanie Adamczyk, PAPhysician Assistant1063007441
  5. Shant Adamian, DOObstetrics & Gynecology Physician1952861668
  6. Ola AhmadStudent in an Organized Health Care Education/Training Program1629871645

Verify Katelyn Marie Ryan Mazeika 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 129421    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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Katelyn Marie Ryan Mazeika among 1,915 social worker records in Wisconsin

Katelyn Marie Ryan Mazeika, MSW, CAPSW, CBIS is one of 1,915 social worker records with a practice address in Wisconsin. 7% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2016, is newer than 45% of them.

  • NPI issued2016 · 45% of these records are older, 52% newer
  • In a Medicare fileNo · 7% of these records are
  • In the CMS Doctors and Clinicians fileNo · 9% of these records are
  • Record last updated2016 · 56% 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 Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

242 social worker records list a practice address in Milwaukee

They are 242 of the 18,389 NPPES records with a practice address in Milwaukee, and 1,915 social worker records in Wisconsin. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 1,915 in Wisconsin → Every provider in Milwaukee → Social Worker nationwide →

The 8 social worker records with the nearest ZIP codes

  1. Jeffrey Harris, APSWMilwaukee, WI 532331841139888
  2. Morgan Kuptz, APSWMilwaukee, WI 532331972487353
  3. William Mullooly, APSWMilwaukee, WI 532331316710890
  4. Holly Neuman, APSWMilwaukee, WI 532331831628338
  5. Anita Oconor, LCSWMilwaukee, WI 532331427132505
  6. Courtney SievertGreenfield, WI 532281134649445
  7. Joseph Abraham, LCSW ACSW CADCWest Allis, WI 532271265544019
  8. Laquera Barnett, LCSWMilwaukee, WI 532271891416830

Common questions

What is Katelyn Marie Ryan Mazeika, MSW, CAPSW, CBIS's NPI number?

Katelyn Marie Ryan Mazeika, MSW, CAPSW, CBIS's National Provider Identifier (NPI) is 1457709909, issued on May 25, 2016. An NPI identifies a provider in billing; it is not a license.

Where is Katelyn Marie Ryan Mazeika, MSW, CAPSW, CBIS located?

The NPPES record lists a practice address at 945 N 12TH St, Milwaukee, WI, 53233. Phone: (651) 271-6738. Providers update this record themselves, so call before visiting.

How can I verify Katelyn Marie Ryan Mazeika, MSW, CAPSW, CBIS's license?

NPPES lists Wisconsin license number 129421, 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. 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.