Katherine Elizabeth Stewart, MD
Emergency Medicine Physician · Portland, ME
Katherine Elizabeth Stewart, MD is an emergency medicine physician with a practice address in Portland, Maine, and NPI 1992321954, issued on Jun 24, 2020. Check the license (Maine MD28948, as entered in NPPES) on the Maine Board of Licensure in Medicine; the Medicare figures below come from public CMS files.
- Name
- Katherine Elizabeth Stewart
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- MD28948 ME
MD19935 RI
Self-reported in NPPES; status is on the state search - Practice location
- 22 Bramhall St, Portland, ME 04102
- Phone
- (207) 662-2381
- Enumerated
- Jun 24, 2020
- Record last updated
- May 1, 2025
- Medicare enrollment
- Enrolled (PECOS I20250507000940); accepts Medicare assignment
- Medical or professional school
- University Of Rochester School Of Medicine And Dentistry, 2020
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 466 in Maine → Look up another NPI →
Also registered at 22 Bramhall St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jessica Abbatiello, NP-CFamily Nurse Practitioner1871811737
- Ruslan Abdukalikov, DOAnesthesiology Physician1831694793
- Tod Abrahams, M.D.Diagnostic Radiology Physician1538231642
- Joshua Abrams, PA-CSurgical Physician Assistant1932832128
- Christopher Abruzzese, D.OAnesthesiology Physician1558789305
- Haley Acker, PA-CPhysician Assistant1972167377
Verify Katherine Elizabeth Stewart in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaine Board of Licensure in Medicine
Search for license MD28948Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
60% fewer Medicare Part D claims than the average emergency medicine physician in 2024
90 Medicare Part D claims for 69 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 13 claims were for opioids.
Most prescribed
- Oxycodone Hcl13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- MainehealthPortland, ME
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine Elizabeth Stewart among 466 emergency medicine physician records in Maine
Katherine Elizabeth Stewart, MD is one of 466 emergency medicine physician records with a practice address in Maine. 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 2020, is newer than 88% of them.
- NPI issued2020 · 88% of these records are older, 9% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2020 · median 2011 among the 293 with a school on file
- Record last updated2025 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Maine practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
105 emergency medicine physician records list a practice address in Portland
They are 105 of the 6,022 NPPES records with a practice address in Portland, and 466 emergency medicine physician records in Maine.
All 466 in Maine → Every provider in Portland → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Michael Baumann, MDPortland, ME 041021205936010
- Meredith Bennet, MDPortland, ME 041021598865404
- Mark Earnshaw, MDPortland, ME 041021720181431
- Megan Fix, MDPortland, ME 041021578554457
- Mark Fourre, MDPortland, ME 041021588653018
- Samir Haydar, DOPortland, ME 041021598782153
- Christine Hein, MDPortland, ME 041021407940901
- Jonathan Karol, DOPortland, ME 041021528165420
Common questions
What is Katherine Elizabeth Stewart, MD's NPI number?
Katherine Elizabeth Stewart, MD's National Provider Identifier (NPI) is 1992321954, issued on Jun 24, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Elizabeth Stewart, MD located?
The NPPES record lists a practice address at 22 Bramhall St, Portland, ME, 04102. Phone: (207) 662-2381. Providers update this record themselves, so call before visiting.
How can I verify Katherine Elizabeth Stewart, MD's license?
NPPES lists Maine license number MD28948, as entered by the provider. Search the Maine Board of Licensure in Medicine at https://www.maine.gov/md/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Katherine Elizabeth Stewart, MD prescribe under Medicare Part D?
In 2024, Katherine Elizabeth Stewart, MD had 90 Medicare Part D claims for 69 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions 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.
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.