Mark Earnshaw, MD
NPI 1720181431 · Emergency Medicine Physician · Portland, ME
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Earnshaw, MD is a Emergency Medicine Physician provider in Portland, ME (NPI 1720181431).
Provider details
- NPI number
- 1720181431
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 012769 (ME)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-07
- Last updated
- 2008-08-29
Frequently asked questions
- What is Mark Earnshaw's NPI number?
- Mark Earnshaw's National Provider Identifier (NPI) is 1720181431, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Earnshaw's specialty?
- Mark Earnshaw is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Earnshaw located?
- Mark Earnshaw's practice location on file with NPPES is 22 Bramhall St, Portland, ME 04102-3134.
- What is Mark Earnshaw's phone number?
- The practice phone number listed in the NPPES registry for Mark Earnshaw is (207) 662-7046.
- Does Mark Earnshaw accept Medicare?
- Mark Earnshaw is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Earnshaw's NPI active?
- Yes — Mark Earnshaw's NPI (1720181431) is active in the NPPES registry as of the last update on 2008-08-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.