Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Mark J. Neavyn, MD

Individual provider Emergency Medicine Physician · NPI 1578719704

Mark J. Neavyn, MD practises Emergency Medicine in Portland, Maine. Qualified in 2006, 20 years ago. Practices with Mainehealth, a 2,615-clinician group and accepts Medicare assignment. Licensed in Connecticut, Massachusetts and Maine.

Years since qualifying
20
Licensed in
CT, MA, ME
In the registry since
2008
Specialties on file
5
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.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence MD23807 (ME)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 250461 (MA)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 052572 (CT)
Medical Toxicology (Emergency Medicine) Physician Taxonomy 207PT0002X · Licence MD23807 (ME)
Medical Toxicology (Emergency Medicine) Physician Taxonomy 207PT0002X · Licence 250461 (MA)

Record details

NPI number1578719704
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 7, 2008
Last updated in NPPESOctober 29, 2021
Certification dateOctober 29, 2021

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Also practisesMEDICAL TOXICOLOGY
Medical schoolOTHER
Graduated 2006 (20 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 patients153
Services billed 167 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

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