Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William L O'Neill Jr., M.D.

Orthopaedic Surgery Physician in Lexington, KY · enumerated 2005.

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

National Provider Identifier

1851385140

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Registry record

Entity type Individual (Type 1)

Name William L O'Neill Jr.

Credential M.D.

Sex Male

Practice address 3480 Yorkshire Medical Park, Lexington, KY, 40509

Phone (859) 263-5140

Fax (859) 263-5141

Enumeration date Sep 1, 2005

Last updated in NPPES Aug 23, 2023

Taxonomy & licenses

2082S0105X Surgery of the Hand (Plastic Surgery) Physician Allopathic & Osteopathic Physicians · License 01044263A (IN) Secondary

2082S0105X Surgery of the Hand (Plastic Surgery) Physician Allopathic & Osteopathic Physicians · License 30764 (KY) Secondary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 30764 (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
200073450A	Medicaid	IN	-
64307648	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.

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Frequently asked questions

What specialty is William O'Neill?

William O'Neill is registered in NPPES with the primary taxonomy of Orthopaedic Surgery 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 2023-08-23.