Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

David J Cancian, MD

Internal Medicine Physician in Watertown, MA · enumerated 2005.

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

National Provider Identifier

1962496539

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Registry record

Entity type Individual (Type 1)

Name David J Cancian

Credential MD

Sex Male

Practice address 480 Pleasant St # A300, Watertown, MA, 02472

Phone (617) 926-9000

Fax (617) 926-7053

Enumeration date Sep 9, 2005

Last updated in NPPES Mar 17, 2025

Taxonomy & licenses

207RG0300X Geriatric Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 78517 (MA) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 78517 (MA) Primary

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
2078821	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 this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is David Cancian?

David Cancian is registered in NPPES with the primary taxonomy of Internal Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-03-17.