Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William S Stevens, M.D.

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

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

National Provider Identifier

1548241250

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Registry record

Entity type Individual (Type 1)

Name William S Stevens

Credential M.D.

Sex Male

Practice address 619 E Mason St, Suite 3p25, Springfield, IL, 62701

Phone (217) 545-7600

Fax (217) 545-2552

Enumeration date Nov 9, 2005

Last updated in NPPES Dec 7, 2020

Taxonomy & licenses

208G00000X Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Allopathic & Osteopathic Physicians · License 036083480 (IL) 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
036083480	Medicaid	IL	-

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

How do I verify William Stevens's NPI record?

Cross-check NPI 1548241250 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1548241250 active?

Yes, as of the latest NPPES snapshot, NPI 1548241250 is active (record last updated 2020-12-07).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-12-07.