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Gregory Kozeny, MD

Nephrology Physician in Winfield, IL · enumerated 2005.

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

National Provider Identifier

1861499550

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Registry record

Entity type Individual (Type 1)
Name Gregory Kozeny
Credential MD
Sex Male
Practice address 25 N Winfield Rd Ste 414, Winfield, IL, 60190
Phone (630) 690-1220
Fax (630) 690-5323
Enumeration date Jul 7, 2005
Last updated in NPPES Oct 30, 2020

Taxonomy & licenses

207RN0300X Nephrology Physician Allopathic & Osteopathic Physicians · License 036059588 (IL) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
1616108 Other IL BCBS
036059588 Medicaid IL -
110059948 Other IL RAILROAD MEDICARE PIN

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 Gregory Kozeny's NPI record?
Cross-check NPI 1861499550 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1861499550 active?
Yes, as of the latest NPPES snapshot, NPI 1861499550 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.