NPI Portal NPI Lookup & Verification

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

Mrs. Kathleen Diffendale, RN

Registered Nurse in Belle Harbor, NY · enumerated 2012.

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

National Provider Identifier

1053679639

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Mrs. Kathleen Diffendale
Credential RN
Sex Female
Practice address Belle Harbor, NY, 11694
Phone (718) 318-8524
Fax (718) 318-2859
Enumeration date May 2, 2012
Last updated in NPPES May 14, 2012

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

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 475889 (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

Where does Kathleen Diffendale practice?
The practice location on file with NPPES is in Belle Harbor, NY. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Kathleen Diffendale?
The National Provider Identifier (NPI) for Kathleen Diffendale is 1053679639, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-05-14.