Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Thaddeus Leland Dunn, MD

Sleep Medicine (Internal Medicine) Physician in Wilmington, NC · enumerated 2005.

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

National Provider Identifier

1275531428

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Registry record

Entity type Individual (Type 1)

Name Dr. Thaddeus Leland Dunn

Credential MD

Sex Male

Practice address 1090 Medical Center Dr, Wilmington, NC, 28401

Phone (910) 343-3345

Fax (910) 343-1924

Enumeration date Jul 12, 2005

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

207RC0200X Critical Care Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 31493 (NC) Secondary

207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians · License 31493 (NC) Secondary

207RS0012X Sleep Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 31493 (NC) 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
4828881	Other	NC	UNITED HEALTHCARE PROVIDE
88073	Other	NC	MEDOCST PROVIDER NUMBER
8929445	Medicaid	NC	-
29445	Other	NC	BCBS OF NC PROVIDER NUMBE

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.

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Frequently asked questions

What specialty is Thaddeus Dunn?

Thaddeus Dunn is registered in NPPES with the primary taxonomy of Sleep Medicine (Internal Medicine) 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 2025-09-11.