Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mackenzie Graye McMillin, PA-C

Individual provider Surgical Physician Assistant · NPI 1558923326

Mackenzie Graye McMillin, PA-C is a Physician Assistant in Portland, Maine. Qualified in 2018, 8 years ago. Practices with Orthopaedic Associates of Maine PA, a 54-clinician group, works from 4 locations and accepts Medicare assignment. Licensed in Maine.

Years since qualifying
8
Licensed in
ME
In the registry since
2019
Specialties on file
2
What do these letters mean?
PA-C — Physician Assistant, Certified
A physician assistant who holds current national certification.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

33 Sewall St
Portland, ME 04102-2638
Phone: (072) 828-2100
Fax: (207) 553-7166
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 (3)

  • 22 Station Ave Ste 201, Brunswick, ME 04011-2092 — (207) 828-2100
  • 14 Thomas Point Rd, Brunswick, ME 04011-3911 — (207) 828-2100
  • 4 Commons Ave Ste A, Windham, ME 04062-5554 — (207) 828-2100

Specialties & licences

Surgical Physician Assistant (primary) Taxonomy 363AS0400X · Licence PA1918 (ME)
Physician Assistant Taxonomy 363A00000X · Licence PAN1918 (ME)

Record details

NPI number1558923326
Entity typeIndividual (Type 1)
GenderFemale
Credentials PA-C
Sole proprietorNo
NPI enumeratedJuly 2, 2019
Last updated in NPPESJuly 21, 2026
Certification dateJuly 21, 2026

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 Orthopaedic Associates Of Maine Pa — 54 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Portland