William Black, M.D.
NPI 1780655860 · Endocrinology, Diabetes & Metabolism Physician · Somerville, MA
William Black, M.D. is a Endocrinology, Diabetes & Metabolism Physician provider in Somerville, MA (NPI 1780655860).
Provider details
- NPI number
- 1780655860
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- License
- 44271 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 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
- 2006-01-27
- Last updated
- 2025-09-11
Frequently asked questions
- What is William Black's NPI number?
- William Black's National Provider Identifier (NPI) is 1780655860, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Black's specialty?
- William Black is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is William Black located?
- William Black's practice location on file with NPPES is 40 Holland St, Somerville, MA 02144-2705.
- What is William Black's phone number?
- The practice phone number listed in the NPPES registry for William Black is (617) 629-6000.
- Is William Black's NPI active?
- Yes — William Black's NPI (1780655860) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.