NPPES file of Aug 9, 2026

Marina O'Brien, PA-C

Physician Assistant · Milwaukee, WI

Marina O'Brien, PA-C is a physician assistant with a practice address in Milwaukee, Wisconsin, and NPI 1932923489, issued on Nov 12, 2024. Check the license (Wisconsin 8738-23, 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
1932923489
Name
Marina O'Brien
Credential
PA-C
Primary taxonomy
Physician Assistant 363A00000X
License number
8738-23 WI
Self-reported in NPPES; status is on the state search
Practice location
2906 S 20TH St, Milwaukee, WI 53215
Phone
(414) 672-1353
Enumerated
Nov 12, 2024
Record last updated
Feb 10, 2026
Medicare enrollment
Enrolled (PECOS I20251208002860); 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 physician assistant records → All 3,475 in Wisconsin → Look up another NPI →

Also registered at 2906 S 20TH St

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

  1. Flavia Adashek, MDPediatrics Physician1902555170
  2. Alexandra Alberda, CNMAdvanced Practice Midwife1316943715
  3. Sol Del Mar Aldrete Audiffred, M.D.Infectious Disease Physician1396059838
  4. Sharais Alvarado Pacheco, LPCProfessional Counselor1720640329
  5. Ann Marie Amaya, CNMAdvanced Practice Midwife1720043300
  6. Marystella AnidiPhysician Assistant1609509157

Verify Marina O'Brien 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 8738-23    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. 16TH Street Community Health Center Inc.Milwaukee, WI

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

Marina O'Brien among 3,475 physician assistant records in Wisconsin

Marina O'Brien, PA-C is one of 3,475 physician assistant records with a practice address in Wisconsin. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2024, is newer than 90% of them.

  • NPI issued2024 · 90% of these records are older, 6% newer
  • In a Medicare fileYes · 81% of these records are
  • In the CMS Doctors and Clinicians fileYes · 72% of these records are
  • Graduated2025 · median 2016 among the 2,491 with a school on file
  • Record last updated2026 · 38% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

821 physician assistant records list a practice address in Milwaukee

They are 821 of the 18,389 NPPES records with a practice address in Milwaukee, and 3,475 physician assistant records in Wisconsin.

All 3,475 in Wisconsin → Every provider in Milwaukee → Physician Assistant nationwide →

The 8 physician assistant records with the nearest ZIP codes

  1. Luann Bronek, PAMilwaukee, WI 532151821065517
  2. Spencer Campbell, P.A.Milwaukee, WI 532151770559825
  3. Laurie Casiano, PAMilwaukee, WI 532151851368534
  4. Tara Ferris, PA-CMilwaukee, WI 532151033191291
  5. M Giebel, PA-CMilwaukee, WI 532151013999275
  6. Lynn Giovetti, PAMilwaukee, WI 532151720055411
  7. Julie Hilbelink, PA-CMilwaukee, WI 532151932176617
  8. Christine Kamelle, PAMilwaukee, WI 532151821090440

Common questions

What is Marina O'Brien, PA-C's NPI number?

Marina O'Brien, PA-C's National Provider Identifier (NPI) is 1932923489, issued on Nov 12, 2024. An NPI identifies a provider in billing; it is not a license.

Where is Marina O'Brien, PA-C located?

The NPPES record lists a practice address at 2906 S 20TH St, Milwaukee, WI, 53215. Phone: (414) 672-1353. Providers update this record themselves, so call before visiting.

How can I verify Marina O'Brien, PA-C's license?

NPPES lists Wisconsin license number 8738-23, 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.