NPI Portal NPI Lookup & Verification

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

Jaclyn A Kassoff, RD

Registered Dietitian in Bellmore, NY · enumerated 2011.

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

National Provider Identifier

1558643924

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Jaclyn A Kassoff
Credential RD
Sex Female
Practice address Bellmore, NY, 11710
Phone (516) 679-1110
Enumeration date Sep 12, 2011
Last updated in NPPES Sep 12, 2011

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

Taxonomy & licenses

133V00000X Registered Dietitian Dietary & Nutritional Service Providers · License 1059289 (NY) Primary
RD · Registered Dietitian: A nutrition professional credentialed by the Commission on Dietetic Registration. About the RD 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 is the NPI number for Jaclyn Kassoff?
The National Provider Identifier (NPI) for Jaclyn Kassoff is 1558643924, a Type 1 (individual) record in the CMS NPPES registry.
Where does Jaclyn Kassoff practice?
The practice location on file with NPPES is in Bellmore, NY. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-09-12.