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

Individual provider Physician Assistant · NPI 1578144911

Erin Rose O'Day, PA-C is a Physician Assistant in Portland, Maine. Qualified in 2021, 5 years ago. Practices with Mainehealth, a 2,615-clinician group, works from 7 locations and accepts Medicare assignment. Licensed in Maine.

Years since qualifying
5
Licensed in
ME
In the registry since
2021
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

22 Bramhall St
Portland, ME 04102-3134
Phone: (207) 662-2381
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (6)

  • 55 Fruit St # 2622, Boston, MA 02114-2621 — (617) 724-2100
  • 1 Medical Center Dr, Biddeford, ME 04005-9422 — (207) 294-5000
  • 335 Brighton Ave, Portland, ME 04102-2363 — (207) 662-0111
  • 75 Maverick St, Rockland, ME 04841-2448 — (207) 301-6000
  • 6 Glen Cove Dr, Rockport, ME 04856-4272 — (207) 921-8311
  • 25 June St, Sanford, ME 04073-2621 — (207) 490-7450

Specialties & licences

Physician Assistant (primary) Taxonomy 363A00000X · Licence PA2935 (ME)

Record details

NPI number1578144911
Entity typeIndividual (Type 1)
GenderFemale
Credentials PA-C
Sole proprietorNo
NPI enumeratedApril 17, 2021
Last updated in NPPESOctober 20, 2025
Certification dateOctober 20, 2025

Medicare enrollment

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

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolOTHER
Graduated 2021 (5 years in practice)
Group practice Mainehealth — 2615 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 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 patients46
Services billed 55 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

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. Those with a page here are linked.

Colleagues at Mainehealth

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2615 clinicians in the practice; 12 are shown here.

Other providers in Portland