Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Brett Hunter Duncan, M.D.

Cardiovascular Disease Physician in Hartford, CT · enumerated 2005.

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

National Provider Identifier

1760482194

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Registry record

Entity type Individual (Type 1)

Name Dr. Brett Hunter Duncan

Credential M.D.

Sex Male

Practice address 100 Retreat Ave, Hartford, CT, 06106

Phone (860) 522-5712

Fax (860) 520-4270

Enumeration date Jul 28, 2005

Last updated in NPPES May 26, 2011

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 036868 (CT) 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
P12038232	Other	CT	MULTIPLAN ID#
010036868CT02	Other	CT	ANTHEM BCBS ID#
0368680446	Other	CT	CONNECTICARE ID#
25679	Other	CT	HEALTH NEW ENGLAND ID#
8531454002	Other	CT	CIGNA HEALTH ID#
OV5811	Other	CT	HEALTHNET ID#
P2406333	Other	CT	OXFORD ID#
001368689	Medicaid	CT	-
2299401	Other	CT	AETNA ID#

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

What specialty is Brett Duncan?

Brett Duncan is registered in NPPES with the primary taxonomy of Cardiovascular Disease Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-05-26.