Matthew Joslyn, M.D.
NPI 1659440790 · Family Medicine Physician · Boston, MA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Matthew Joslyn, M.D. is a Family Medicine Physician provider in Boston, MA (NPI 1659440790).
Provider details
- NPI number
- 1659440790
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 219680 (MA)
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
- 2006-11-06
- Last updated
- 2015-01-08
Frequently asked questions
- What is Matthew Joslyn's NPI number?
- Matthew Joslyn's National Provider Identifier (NPI) is 1659440790, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Joslyn's specialty?
- Matthew Joslyn is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Matthew Joslyn located?
- Matthew Joslyn's practice location on file with NPPES is 780 Albany St, Boston, MA 02118-2524.
- What is Matthew Joslyn's phone number?
- The practice phone number listed in the NPPES registry for Matthew Joslyn is (857) 654-1000.
- Does Matthew Joslyn accept Medicare?
- Matthew Joslyn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Matthew Joslyn's NPI active?
- Yes — Matthew Joslyn's NPI (1659440790) is active in the NPPES registry as of the last update on 2015-01-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.