Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Louis Dvorkin, PH.D.

Clinical Neuropsychologist in Park Ridge, IL · enumerated 2007.

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

National Provider Identifier

1891905436

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Registry record

Entity type Individual (Type 1)

Name Dr. Louis Dvorkin

Credential PH.D.

Sex Male

Practice address 1440 Renaissance Dr, 320, Park Ridge, IL, 60068

Phone (847) 759-9110

Fax (847) 759-9440

Enumeration date May 23, 2007

Last updated in NPPES Oct 30, 2020

Taxonomy & licenses

103G00000X Clinical Neuropsychologist Behavioral Health & Social Service Providers · License 6301003853 (MI) Secondary

103G00000X Clinical Neuropsychologist Behavioral Health & Social Service Providers · License 071.008864 (IL) Primary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD 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.

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Frequently asked questions

How do I verify Louis Dvorkin's NPI record?

Cross-check NPI 1891905436 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1891905436 active?

Yes, as of the latest NPPES snapshot, NPI 1891905436 is active (record last updated 2020-10-30).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-10-30.