Gregory Kozeny, MD
Nephrology Physician · Winfield, IL
Gregory Kozeny, MD is a nephrology physician with a practice address in Winfield, Illinois, and NPI 1861499550, issued on Jul 7, 2005. Check the license (Illinois 036059588, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Gregory Kozeny
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- 036059588 IL
Self-reported in NPPES; status is on the state search - Practice location
- 25 N Winfield RD Ste 414, Winfield, IL 60190
- Phone
- (630) 690-1220
- Enumerated
- Jul 7, 2005
- Record last updated
- Oct 30, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (630) 690-5323
- Medicaid ID
- 036059588 IL
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 572 in Illinois → Look up another NPI →
Also registered at 25 N Winfield RD Ste 414
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maureen Chapman, APNNurse Practitioner1326124355
- Steven Heidt, MDNephrology Physician1891317616
- Kelly Schlotman, MDNephrology Physician1780175828
- Cherie SulimaNurse Practitioner1457984205
- Adriana Vanta, MSN, RN, FNP-BCFamily Nurse Practitioner1851952717
Verify Gregory Kozeny in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036059588Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average nephrology physician in 2024
219 Medicare Part D claims for 79 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate15 claims
- Losartan Potassium15 claims
- Farxiga13 claims
- Furosemide11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $69.56
3 payments; by number, the most common kind was food and beverage; the largest payer was Vifor Pharma, Inc. The 8,230 providers of this specialty with any payment received $3,091.37 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Gregory Kozeny among 572 nephrology physician records in Illinois
Gregory Kozeny, MD is one of 572 nephrology physician records with a practice address in Illinois. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 88% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileNo · 76% of these records are
- Record last updated2020 · 39% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
8 nephrology physician records list a practice address in Winfield
They are 8 of the 778 NPPES records with a practice address in Winfield, and 572 nephrology physician records in Illinois.
All 572 in Illinois → Every provider in Winfield → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Ernest Dejesus, MDWinfield, IL 601901295737088
- Kristie Delaney, M.D.Winfield, IL 601901295026441
- Steven Heidt, MDWinfield, IL 601901891317616
- Jeffrey Kropp, MDWinfield, IL 601901902083538
- Ankit Rawal, D.O.Winfield, IL 601901891074555
- Kelly Schlotman, MDWinfield, IL 601901780175828
- Regan Seipp, M.D.Winfield, IL 601901306256284
- Jyoti Eknoor Brar, M.B.B.S.Evanston, IL 602011609193028
Common questions
What is Gregory Kozeny, MD's NPI number?
Gregory Kozeny, MD's National Provider Identifier (NPI) is 1861499550, issued on Jul 7, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Kozeny, MD located?
The NPPES record lists a practice address at 25 N Winfield RD Ste 414, Winfield, IL, 60190. Phone: (630) 690-1220. Providers update this record themselves, so call before visiting.
How can I verify Gregory Kozeny, MD's license?
NPPES lists Illinois license number 036059588, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory Kozeny, MD prescribe under Medicare Part D?
In 2024, Gregory Kozeny, MD had 219 Medicare Part D claims for 79 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.