Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Mark Williams M.D., LLC

Internal Medicine Physician in Louisville, KY · enumerated 2006 · authorized official Mark Williams, President.

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

National Provider Identifier

1821006032

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Registry record

Entity type Organization (Type 2)

Legal business name Mark Williams M.D., LLC

Practice address 12010 Shelbyville Rd, Suite 300, Louisville, KY, 40243

Phone (502) 244-9355

Fax (502) 244-9577

Enumeration date Aug 3, 2006

Last updated in NPPES Jun 17, 2024

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 34119 (KY) Primary

Authorized official

Name Mark Williams

Title President

Phone (502) 244-9355

Other identifiers

Identifier	Type	State	Issuer
000000334878	Other	KY	ANTHEM PROVIDER ID
5931697	Other	-	AETNA PROVIDER ID
P00202037	Other	KY	RAILROAD MEDICARE ID
H10999	Other	KY	UPIN

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

Where is Mark Williams M.D., LLC located?

The practice location on file with NPPES is in Louisville, KY.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2024-06-17. Verify at npiregistry.cms.hhs.gov.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-06-17.