Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Steven D. Williams, M.D.
Plastic and Reconstructive Surgery Physician in Bourbonnais, IL · enumerated 2006 · practices at Keith A. Moss, M.D., Sc.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1255426169
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Registry record
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 036075799 | Medicaid | IL | - |
| 36075799 | Medicaid | IL | - |
| 4632039 | Other | IL | BC GROUP # |
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.
Frequently asked questions
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Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-02-09.