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

Ms. Carolyn Esther Williams, RN

Infusion Therapy Registered Nurse in Round Lake, IL · enumerated 2011.

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

National Provider Identifier

1083981740

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Ms. Carolyn Esther Williams

Credential RN

Sex Female

Practice address Round Lake, IL, 60073

Phone (847) 270-5071

Enumeration date Nov 23, 2011

Last updated in NPPES Nov 23, 2011

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

Taxonomy & licenses

163WI0500X Infusion Therapy Registered Nurse Nursing Service Providers · License 041281100 (IL) Primary

RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN credential

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 specialty is Carolyn Williams?

Carolyn Williams is registered in NPPES with the primary taxonomy of Infusion Therapy Registered Nurse. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-11-23.