Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Charles Wayne Williams, CNS.,NP.

Gerontology Clinical Nurse Specialist in Elk Grove, CA · enumerated 2006.

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

National Provider Identifier

1851455372

Verified

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Registry record

Entity type Individual (Type 1)

Name Dr. Charles Wayne Williams

Credential CNS.,NP.

Sex Male

Practice address Elk Grove, CA, 95757

Phone (916) 752-1273

Fax (916) 676-4865

Enumeration date Dec 20, 2006

Last updated in NPPES Apr 26, 2008

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

364SG0600X Gerontology Clinical Nurse Specialist Physician Assistants & Advanced Practice Nursing Providers · License CNS1514 (CA) Primary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP credential

Other identifiers

Identifier	Type	State	Issuer
CNS015140	Medicaid	CA	-

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

What is the NPI number for Charles Williams?

The National Provider Identifier (NPI) for Charles Williams is 1851455372, a Type 1 (individual) record in the CMS NPPES registry.

Where does Charles Williams practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-04-26.