Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marcy Marie Duncan, M.D.

Pediatrics Physician in Lexington, KY · enumerated 2006.

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

National Provider Identifier

1427000223

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Marcy Marie Duncan

Credential M.D.

Sex Female

Practice address 2400 Greatstone Pt, Lexington, KY, 40504

Phone (859) 323-6211

Enumeration date May 17, 2006

Last updated in NPPES Sep 21, 2016

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License MD0000040774 (TN) Secondary

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 41881 (KY) 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
7100055710	Medicaid	KY	-

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 1427000223 active?

Yes, as of the latest NPPES snapshot, NPI 1427000223 is active (record last updated 2016-09-21).

How do I verify Marcy Duncan's NPI record?

Cross-check NPI 1427000223 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-09-21.