Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Sandra K. Williams, APN

Adult Health Nurse Practitioner in Saint Louis, MO · enumerated 2007.

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

National Provider Identifier

1639380447

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Registry record

Entity type Individual (Type 1)

Name Sandra K. Williams

Credential APN

Sex Female

Practice address 12655 Olive Blvd, 4th Floor, Saint Louis, MO, 63141

Phone (314) 517-4832

Fax (314) 851-4445

Enumeration date May 24, 2007

Last updated in NPPES May 12, 2011

Taxonomy & licenses

163WC0400X Case Management Registered Nurse Nursing Service Providers · License 061769 (MO) Secondary

363LA2200X Adult Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 061769 (MO) Primary

363LA2200X Adult Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 209-004555 (IL) Secondary

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 does Sandra Williams practice?

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

What is the NPI number for Sandra Williams?

The National Provider Identifier (NPI) for Sandra Williams is 1639380447, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-05-12.