Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Michael Constantine, M.D.

Hematology (Internal Medicine) Physician in Milford, MA · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1366468415

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Registry record

Entity type Individual (Type 1)

Name Michael Constantine

Credential M.D.

Sex Male

Practice address 14 Prospect St, Hill Health Building, Milford, MA, 01757

Phone (508) 478-2061

Fax (508) 478-7768

Enumeration date Jul 14, 2006

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

207RH0000X Hematology (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 75799 (MA) Primary

207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License 75799 (MA) Secondary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
3138984	Medicaid	MA	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1366468415 active?

Yes, as of the latest NPPES snapshot, NPI 1366468415 is active (record last updated 2025-09-11).

How do I verify Michael Constantine's NPI record?

Cross-check NPI 1366468415 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.