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

Bernadetta Leszczynski, RDN, LDN

Registered Dietitian in Wheeling, IL · enumerated 2014.

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

National Provider Identifier

1821497504

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Registry record

Entity type Individual (Type 1)

Name Bernadetta Leszczynski

Credential RDN, LDN

Sex Female

Practice address Wheeling, IL, 60090

Phone (847) 361-1784

Enumeration date Aug 18, 2014

Last updated in NPPES Aug 18, 2014

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 164.006187 (IL) Primary

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 Bernadetta Leszczynski?

The National Provider Identifier (NPI) for Bernadetta Leszczynski is 1821497504, a Type 1 (individual) record in the CMS NPPES registry.

Where does Bernadetta Leszczynski practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-08-18.