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

Eugene Reznik, PsyD

Clinical Neuropsychologist in Algonquin, IL · enumerated 2021.

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

National Provider Identifier

1679156111

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Registry record

Entity type Individual (Type 1)

Name Eugene Reznik

Credential PsyD

Sex Male

Practice address Algonquin, IL, 60102

Phone (847) 469-7537

Fax (847) 469-7540

Enumeration date May 3, 2021

Last updated in NPPES Oct 5, 2026

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

Taxonomy & licenses

103G00000X Clinical Neuropsychologist Behavioral Health & Social Service Providers · License 071.022723 (IL) Primary

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License PSY10001486 (MA) Secondary

PSYD · Doctor of Psychology: A clinical doctorate in psychology focused on professional practice. About the PSYD 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 Eugene Reznik practice?

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

What is the NPI number for Eugene Reznik?

The National Provider Identifier (NPI) for Eugene Reznik is 1679156111, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-10-05.