Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. James Bertram Williams, M.D.

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Peoria, IL · enumerated 2005.

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

National Provider Identifier

1265433882

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Registry record

Entity type Individual (Type 1)

Name Dr. James Bertram Williams

Credential M.D.

Sex Male

Practice address 2420 W Nebraska Ave, Peoria, IL, 61604

Phone (309) 680-5000

Fax (309) 680-1002

Enumeration date Aug 4, 2005

Last updated in NPPES Jun 28, 2011

Taxonomy & licenses

208G00000X Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Allopathic & Osteopathic Physicians · License 036099138 (IL) Primary

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License 036099138 (IL) Secondary

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
P00059260	Other	IL	RETIRED RAILROAD MEDICARE
036099138	Medicaid	IL	-
IL0101/010794248-01	Other	IL	JOHN DEERE
7232062	Other	IL	BLUE SHIELD PROVIDER NO

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 is the NPI number for James Williams?

The National Provider Identifier (NPI) for James Williams is 1265433882, a Type 1 (individual) record in the CMS NPPES registry.

Where does James Williams practice?

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

Other providers at this practice address

Browse all →

Cardiac Thoracic & Endovascular Therapies, S.C. Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Peoria, IL NPI 1962417485 Heartland Vascular Care Pllc Vascular & Interventional Radiology Physician · Peoria, IL NPI 1134804420

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-06-28.