Brennan Marsh-Armstrong, MD
NPI 1801646948 · Student in an Organized Health Care Education/Training Program · Portland, ME
Enrolled with Medicare as Order and Referring Only - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Brennan Marsh-Armstrong, MD is a Student in an Organized Health Care Education/Training Program provider in Portland, ME (NPI 1801646948).
Provider details
- NPI number
- 1801646948
- Entity type
- Individual
- Primary specialty
- Student in an Organized Health Care Education/Training ProgramStudent, Health Care
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
2 yrs in NPPES registry
- Profile completeness38% of score
83% 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
- 2024-03-22
- Last updated
- 2024-03-22
- Certified
- 2024-03-22
Frequently asked questions
- What is Brennan Marsh-Armstrong's NPI number?
- Brennan Marsh-Armstrong's National Provider Identifier (NPI) is 1801646948, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Brennan Marsh-Armstrong's specialty?
- Brennan Marsh-Armstrong is listed in the NPPES registry with a primary specialty of Student in an Organized Health Care Education/Training Program (Student, Health Care).
- Where is Brennan Marsh-Armstrong located?
- Brennan Marsh-Armstrong's practice location on file with NPPES is 22 Bramhall St, Portland, ME 04102-3175.
- What is Brennan Marsh-Armstrong's phone number?
- The practice phone number listed in the NPPES registry for Brennan Marsh-Armstrong is (207) 662-0111.
- Does Brennan Marsh-Armstrong accept Medicare?
- Brennan Marsh-Armstrong is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Brennan Marsh-Armstrong's NPI active?
- Yes — Brennan Marsh-Armstrong's NPI (1801646948) is active in the NPPES registry as of the last update on 2024-03-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.