NPPES file of Aug 9, 2026

Aoife O'Brien, PA-C

Medical Physician Assistant · Philadelphia, PA

Aoife O'Brien, PA-C is a medical physician assistant with a practice address in Philadelphia, Pennsylvania, and NPI 1952104523, issued on Mar 31, 2025. Check the license (Pennsylvania MA066445, as entered in NPPES) with the Pennsylvania 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
1952104523
Name
Aoife O'Brien
Credential
PA-C
Primary taxonomy
Medical Physician Assistant 363AM0700X
License number
MA066445 PA
Self-reported in NPPES; status is on the state search
Practice location
834 Chestnut St Ste 450, Philadelphia, PA 19107
Phone
(215) 955-8544
Enumerated
Mar 31, 2025
Record last updated
Mar 31, 2025
Medicare enrollment
Enrolled (PECOS I20250617002389); 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 medical physician assistant records → All 3,897 in Pennsylvania → Look up another NPI →

Also registered at 834 Chestnut St Ste 450

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

  1. Ashley LaurielloGerontology Nurse Practitioner1821441924

Verify Aoife O'Brien in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Pennsylvania board licenses this profession
    Search for license MA066445    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 Pennsylvania 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. Jefferson University PhysiciansPhiladelphia, PA

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

Aoife O'Brien among 3,897 medical physician assistant records in Pennsylvania

Aoife O'Brien, PA-C is one of 3,897 medical physician assistant records with a practice address in Pennsylvania. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2025, is newer than 96% of them.

  • NPI issued2025 · 96% of these records are older, 1% newer
  • In a Medicare fileYes · 80% of these records are
  • In the CMS Doctors and Clinicians fileYes · 63% of these records are
  • Graduated2024 · median 2015 among the 2,467 with a school on file
  • Record last updated2025 · 53% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AM0700X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Medical Physician Assistant providers in Pennsylvania

There are 3,897 medical physician assistant records in Pennsylvania.

All 3,897 in Pennsylvania → Every provider in Philadelphia → Medical Physician Assistant nationwide →

The 8 medical physician assistant records with the nearest ZIP codes

  1. Michelle Anderson, PA-CPhiladelphia, PA 191071205851474
  2. Amy Bustin, PA-CPhiladelphia, PA 191071982643920
  3. Cara Grugan, PA-CPhiladelphia, PA 191071912104118
  4. Tuyet-Lynn Luu, PA-CPhiladelphia, PA 191071710915863
  5. Sara McDonald, P.A.Philadelphia, PA 191071629093844
  6. Matthew McKeever, PA-CPhiladelphia, PA 191071518112895
  7. Brenda Palmore, PA-CPhiladelphia, PA 191071073768354
  8. Marisa Roche, P.A.Philadelphia, PA 191071376575878

Common questions

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

Aoife O'Brien, PA-C's National Provider Identifier (NPI) is 1952104523, issued on Mar 31, 2025. An NPI identifies a provider in billing; it is not a license.

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

The NPPES record lists a practice address at 834 Chestnut St Ste 450, Philadelphia, PA, 19107. Phone: (215) 955-8544. Providers update this record themselves, so call before visiting.

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

NPPES lists Pennsylvania license number MA066445, as entered by the provider. Search the Pennsylvania 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.