Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Nancy S. Williams, MD Sc

Family Medicine Physician in Rochelle, IL · enumerated 2008 · authorized official Nancy Williams, President.

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

National Provider Identifier

1871751560

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Registry record

Entity type Organization (Type 2)

Legal business name Nancy S. Williams, MD Sc

Practice address 1181 N 8th St, Suite 1, Rochelle, IL, 61068

Phone (815) 562-8735

Fax (815) 562-2934

Enumeration date May 29, 2008

Last updated in NPPES Jul 18, 2008

Taxonomy & classification

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 36057715 (IL) Primary

Authorized official

Name Nancy Williams

Title President

Phone (815) 562-8735

Other identifiers

Identifier	Type	State	Issuer
036057715	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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where is Nancy S. Williams, MD Sc located?

The practice location on file with NPPES is in Rochelle, IL.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2008-07-18. 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 2008-07-18.