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

Mrs. Nancy Cliff, RN, MSN

Registered Nurse in Tonawanda, NY · enumerated 2011.

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

National Provider Identifier

1558646331

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Mrs. Nancy Cliff

Credential RN, MSN

Sex Female

Practice address Tonawanda, NY, 14150

Phone (716) 695-2600

Enumeration date Oct 12, 2011

Last updated in NPPES Oct 12, 2011

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

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 310656-1 (NY) 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

Is NPI 1558646331 active?

Yes, as of the latest NPPES snapshot, NPI 1558646331 is active (record last updated 2011-10-12).

How do I verify Nancy Cliff's NPI record?

Cross-check NPI 1558646331 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-10-12.