Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Erin Elizabeth O'Brien, PA-C

Individual provider Medical Physician Assistant · NPI 1225538697

Erin Elizabeth O'Brien, PA-C is a Physician Assistant in Bay Shore, New York. Qualified in 2018, 8 years ago. Practices with North Shore-Lij Medical PC, a 6,350-clinician group and accepts Medicare assignment.

Years since qualifying
8
In the registry since
2018
Specialties on file
3
What do these letters mean?
PA-C — Physician Assistant, Certified
A physician assistant who holds current national certification.

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Practice location Address checks out

301 E Main St
Bay Shore, NY 11706-8408
Phone: (631) 968-3000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Physician Assistant (primary) Taxonomy 363A00000X
Medical Physician Assistant Taxonomy 363AM0700X
Surgical Physician Assistant Taxonomy 363AS0400X

Record details

NPI number1225538697
Entity typeIndividual (Type 1)
GenderFemale
Credentials PA-C
Sole proprietorNo
NPI enumeratedFebruary 12, 2018
Last updated in NPPESFebruary 7, 2023
Certification dateFebruary 7, 2023

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolOTHER
Graduated 2018 (8 years in practice)
Group practice North Shore-Lij Medical Pc — 6350 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients54
Services billed 79 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at North Shore-Lij Medical PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 6350 clinicians in the practice; 12 are shown here.

Other providers in Bay Shore