Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Lee Monroe Duke II, M.D.

Specialist in Lancaster, PA · enumerated 2006.

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

National Provider Identifier

1922051721

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Registry record

Entity type Individual (Type 1)

Name Lee Monroe Duke II

Credential M.D.

Sex Male

Practice address 540 N Duke St, Lancaster, PA, 17602

Phone (717) 544-4930

Fax (717) 544-4964

Enumeration date May 19, 2006

Last updated in NPPES Mar 15, 2024

Taxonomy & licenses

174400000X Specialist Other Service Providers · License MD044437L (PA) 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
1249188/01	Medicaid	PA	-

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 1922051721 active?

Yes, as of the latest NPPES snapshot, NPI 1922051721 is active (record last updated 2024-03-15).

How do I verify Lee Duke's NPI record?

Cross-check NPI 1922051721 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-03-15.