Marc Demers, MD
NPI 1396847794 · Surgery Physician · Portland, ME
Enrolled with Medicare as Practitioner - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marc Demers, MD is a Surgery Physician provider in Portland, ME (NPI 1396847794).
Provider details
- NPI number
- 1396847794
- Entity type
- Individual
- Primary specialty
- Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- ME0070771 (FL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
2 documented practice locations
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
Additional practice locations (1)
- 93 Campus Ave I2 WingLewiston, ME 04240-6030Phone: (207) 777-8650Fax: (207) 777-8641
Registry dates
- Enumerated
- 2006-09-05
- Last updated
- 2020-10-14
- Certified
- 2020-10-14
Frequently asked questions
- What is Marc Demers's NPI number?
- Marc Demers's National Provider Identifier (NPI) is 1396847794, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marc Demers's specialty?
- Marc Demers is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Marc Demers located?
- Marc Demers's practice location on file with NPPES is 887 Congress St Ste 400, Portland, ME 04102-3163.
- What is Marc Demers's phone number?
- The practice phone number listed in the NPPES registry for Marc Demers is (207) 373-6000.
- Does Marc Demers accept Medicare?
- Marc Demers is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marc Demers's NPI active?
- Yes — Marc Demers's NPI (1396847794) is active in the NPPES registry as of the last update on 2020-10-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.