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

Dr. Katherine Elizabeth Stewart, MD

Individual provider Emergency Medicine Physician · NPI 1992321954

Dr. Katherine Elizabeth Stewart, MD practises Emergency Medicine in Portland, Maine. Graduated from University of Rochester School of Medicine and Dentistry in 2020, 6 years ago. Practices with Mainehealth, a 2,615-clinician group, works from 5 locations and accepts Medicare assignment. Licensed in Maine and Rhode Island.

Years since qualifying
6
Trained at
University of Rochester School of Medicine and Dentistry
Licensed in
ME, RI
In the registry since
2020
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

22 Bramhall St
Portland, ME 04102-3134
Phone: (207) 662-2381
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (4)

  • 1 Medical Center Dr, Biddeford, ME 04005-9422 — (207) 294-5000
  • 335 Brighton Ave, Portland, ME 04102-2363 — (207) 662-0111
  • 25 June St, Sanford, ME 04073-2621 — (207) 490-7450
  • 593 Eddy St, Providence, RI 02903-4923 — (401) 444-6489

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence MD28948 (ME)
Emergency Medicine Physician Taxonomy 207P00000X · Licence MD19935 (RI)

Record details

NPI number1992321954
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 24, 2020
Last updated in NPPESMay 1, 2025
Certification dateMay 1, 2025

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolUNIVERSITY OF ROCHESTER SCHOOL OF MEDICINE AND DENTISTRY
Graduated 2020 (6 years in practice)
Group practice Mainehealth — 2615 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 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 patients113
Services billed 128 a service is one billed item, such as a visit, a test or a procedure
Average patient age78

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 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