Mark Armstrong, M.D.
NPI 1538420369 · Student in an Organized Health Care Education/Training Program · New York, NY
Mark Armstrong, M.D. is a Student in an Organized Health Care Education/Training Program provider in New York, NY (NPI 1538420369).
Provider details
- NPI number
- 1538420369
- Entity type
- Individual
- Primary specialty
- Student in an Organized Health Care Education/Training ProgramStudent, Health Care
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
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
14 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
- 2012-06-07
- Last updated
- 2012-06-07
Frequently asked questions
- What is Mark Armstrong's NPI number?
- Mark Armstrong's National Provider Identifier (NPI) is 1538420369, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Armstrong's specialty?
- Mark 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 Mark Armstrong located?
- Mark Armstrong's practice location on file with NPPES is 170 William St, New York, NY 10038-2612.
- What is Mark Armstrong's phone number?
- The practice phone number listed in the NPPES registry for Mark Armstrong is (757) 604-2585.
- Is Mark Armstrong's NPI active?
- Yes — Mark Armstrong's NPI (1538420369) is active in the NPPES registry as of the last update on 2012-06-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.