Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Carl Ronald Duncan, MD

Q: What is the NPI number for Carl Duncan?

The National Provider Identifier (NPI) for Carl Duncan is 1346237369, a Type 1 (individual) record in the CMS NPPES registry.

Diagnostic Radiology Physician in Annapolis, MD · enumerated 2005.

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

National Provider Identifier

1346237369

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Registry record

Entity type Individual (Type 1)

Name Dr. Carl Ronald Duncan

Credential MD

Sex Male

Practice address 2002 Medical Pkwy, Suite 235, Annapolis, MD, 21401

Phone (410) 266-2770

Fax (410) 841-6251

Enumeration date Oct 4, 2005

Last updated in NPPES Nov 13, 2007

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License MD018124E (PA) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License D0063737 (MD) 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
018787A80	Other	MD	AAD PG COUNTY
081481401	Medicaid	MD	-
8317071	Other	MD	AETNA PPO
10690028	Other	MD	BCBS
2622593	Other	MD	AETNA HMO/POS
N282	Other	MD	AAD AA COUNTY

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

Where does Carl Duncan practice?

The practice location on file with NPPES is in Annapolis, MD. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Carl Duncan?

The National Provider Identifier (NPI) for Carl Duncan is 1346237369, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-11-13.