Mark D. Earnshaw, MD
Emergency Medicine Physician · Portland, ME
Mark D. Earnshaw, MD is an emergency medicine physician with a practice address in Portland, Maine, and NPI 1720181431, issued on Sep 7, 2006. Check the license (Maine 012769, as entered in NPPES) on the Maine Board of Licensure in Medicine; the Medicare figures below come from public CMS files.
- Name
- Mark D. Earnshaw
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 012769 ME
Self-reported in NPPES; status is on the state search - Practice location
- 22 Bramhall St, Portland, ME 04102
- Phone
- (207) 662-7046
- Enumerated
- Sep 7, 2006
- Record last updated
- Aug 29, 2008 (not updated in 18 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20050613000784); accepts Medicare assignment
- Medical or professional school
- University Of Mississippi School Of Medicine, 1985
- 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.
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- Joshua Abrams, PA-CSurgical Physician Assistant1932832128
- Christopher Abruzzese, D.OAnesthesiology Physician1558789305
- Haley Acker, PA-CPhysician Assistant1972167377
Verify Mark D. Earnshaw in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaine Board of Licensure in Medicine
Search for license 012769Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The MIPS final score for 2023 (Medicare payment program): 98.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
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).
Mark D. Earnshaw among 466 emergency medicine physician records in Maine
Mark D. Earnshaw, 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 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 62% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1985 · median 2011 among the 293 with a school on file
- Record last updated2008 · 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
- 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
- Nathan Mick, MDPortland, ME 041021386743086
Common questions
What is Mark D. Earnshaw, MD's NPI number?
Mark D. Earnshaw, MD's National Provider Identifier (NPI) is 1720181431, issued on Sep 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark D. Earnshaw, MD located?
The NPPES record lists a practice address at 22 Bramhall St, Portland, ME, 04102. Phone: (207) 662-7046. Providers update this record themselves, so call before visiting.
How can I verify Mark D. Earnshaw, MD's license?
NPPES lists Maine license number 012769, 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.
What is Mark D. Earnshaw, MD's MIPS final score?
The 2023 MIPS final score is 98.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.