Jan Leyden, M.D.
NPI 1821236852 · Student in an Organized Health Care Education/Training Program · Brookline, MA
Jan Leyden, M.D. is a Student in an Organized Health Care Education/Training Program provider in Brookline, MA (NPI 1821236852).
Provider details
- NPI number
- 1821236852
- Entity type
- Individual
- Primary specialty
- Student in an Organized Health Care Education/Training ProgramStudent, Health Care
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 238315 (MA)
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
17 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
- 2009-01-29
- Last updated
- 2009-01-29
Frequently asked questions
- What is Jan Leyden's NPI number?
- Jan Leyden's National Provider Identifier (NPI) is 1821236852, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jan Leyden's specialty?
- Jan Leyden 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 Jan Leyden located?
- Jan Leyden's practice location on file with NPPES is 99 Pond Ave, Brookline, MA 02445-7129.
- What is Jan Leyden's phone number?
- The practice phone number listed in the NPPES registry for Jan Leyden is (617) 708-4568.
- Is Jan Leyden's NPI active?
- Yes — Jan Leyden's NPI (1821236852) is active in the NPPES registry as of the last update on 2009-01-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.