John Hare, M.D,
NPI 1861536450 · Endocrinology, Diabetes & Metabolism Physician · Boston, MA
John Hare, M.D, is a Endocrinology, Diabetes & Metabolism Physician provider in Boston, MA (NPI 1861536450).
Provider details
- NPI number
- 1861536450
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D,
- Sex
- Male
- Sole proprietor
- No
- License
- 36947 (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
- 2007-02-16
- Last updated
- 2007-07-08
Frequently asked questions
- What is John Hare's NPI number?
- John Hare's National Provider Identifier (NPI) is 1861536450, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Hare's specialty?
- John Hare is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is John Hare located?
- John Hare's practice location on file with NPPES is 1 Joslin Pl, Boston, MA 02215-5306.
- What is John Hare's phone number?
- The practice phone number listed in the NPPES registry for John Hare is (617) 226-5858.
- Is John Hare's NPI active?
- Yes — John Hare's NPI (1861536450) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.