WILLIAM L. BLACK M.D. – NPI #1780655860
Internal Medicine
An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.
WILLIAM BLACK is a physician located in SOMERVILLE, MA. NPPES has assigned the NPI number 1780655860 to WILLIAM BLACK on January 27, 2006. It is a Type-1 NPI, indicating this NPI number is associated with an individual. With multiple taxonomy codes selected, the primary taxonomy selected by this provider is 207RE0101X from the Health Care Provider Taxonomy code set, which is classified as Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism
The NPI profile was last updated on Sep 11, 2025. Use the NPI data found here to bill health insurance companies, identify providers enrolled in Medicare and Medicaid services or other HIPAA compliant transactions. See the complete NPI profile for WILLIAM BLACK below.
NPI Profile for
WILLIAM L. BLACK
(more than 20 years ago)
INTERNAL MEDICINE
SOMERVILLE, MA 02144-2705 Phone: (617) 629-6000 Fax:
PROVIDER ENROLLMENT - 9TH FLOOR
BOSTON, MA 02109-4806 Phone: (617) 559-8374 Fax: (617) 421-3487
Identifiers for WILLIAM BLACK
Identifiers are used to associate other provider identifiers such as Medicaid or other insurers (ie:, Blue Cross, Blue Shield, Aetna, Kaiser-Permanente, etc.), with their NPI number. These identifiers can be used in matching an NPI number to an insurer's records. However, not all providers have such numbers and not all providers choose to include them in their NPI information.
| Description | Issuer | State | Identifier |
|---|---|---|---|
| other | BLUE CROSS | MA | E05162 |
| other | HARVARD PILGRIM | MA | PV509 |
| other | TUFTS | MA | 044271 |
| medicaid | MA | 2096129 |
A taxonomy code is a code that describes the health care service provider's type, classification, and the area of specialization. The primary specialty for this provider is indicated as (Primary) below.
| Taxonomy Classification / Specialization | State | License |
|---|---|---|
| 207RE0101X - Internal Medicine / Endocrinology, Diabetes & Metabolism (Primary) |
MA | 44271 |
| 207R00000X - Internal Medicine |
MA | 44271 |
The taxonomy codes are selected by the provider at the time of NPI registration. Selection of a taxonomy code does not replace any credentialing or validation process that the provider requesting the code should complete.