GREGORY KOZENY (MD) – Nephrology Physician, NPI 1861499550

Nephrology Physician

GREGORY KOZENY (MD) is a healthcare provider. based in Winfield, Illinois. specializing in Nephrology Physician. They hold the professional credentials MD. They hold a License No. 036059588 (IL). The NPI Number for GREGORY KOZENY (MD) is 1861499550

Main info

Male

48 Years Of Experience

Accepts Medicare Assignment

Name

GREGORY KOZENY (MD)

NPI

1861499550

Phone

(630) 690-1220

Address

25 N WINFIELD RD STE 414

Enumeration Date

7 July 2005

Last Update Date

30 October 2020

Doctor Profile

Medical School Name

LOYOLA UNIVERSITY OF CHICAGO, STRITCH SCHOOL OF MEDICINE

Secondary Phone

6306821600

Graduation Year

1978 (48 years ago)

PAC ID

8921991407

Group Practice PAC ID

2163328675

Professional Enrollment ID

I20050929000712

Contacts

Secure Messaging

credentialing@nephdocs.com

Data current as of

19 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology

Experience64

Completeness85

Years active:20State licenses:1Other namesUpdated within 12 months

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Provider Addresses for GREGORY KOZENY (MD)

North Winfield Road, North Winfield, Town of Winfield, Herkimer County, New York, 13491, United States
WINFIELD, IL 601901379
Phone: (630) 690-1220
Fax: (630) 690-5323
Type: Location
120 W 22ND ST STE 200
OAK BROOK, IL 605231563
Phone: (630) 575-5000
Type: Mailing

NPPES updates history

No NPPES updates recorded for this provider.

Prescription Activity

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Open Payments (CMS)

CMS reports 33 Open Payments records for all available years, with a total value of $827.

Total Amount is formed as General ($827) + Research ($0) + Ownership ($0) = $827.

Last reported payment date: 2024-05-28 • Largest payer in this snapshot: Ascendis Pharma Inc ($164).

Total Amount

$827

General + Research + Ownership

Payments

Total payment records

General Amount

$827

General payments

Research Amount

Research funding

Ownership Amount

Ownership interests

Ownership Count

Ownership records

Last Payment Date

2024-05-28

Latest reported date

Top Companies

Largest payers in this snapshot

Company	Amount
Ascendis Pharma Inc	$164
Amgen Inc.	$129
Travere Therapeutics, Inc.	$118
AstraZeneca Pharmaceuticals LP	$91
Vifor Pharma, Inc.	$70

View all Open Payments →|Open Payments Risk Radar →

Medicare Enrollment & Revalidation

Source: CMS public data · Not endorsed by CMS ·

Educational use only—not medical, billing, or legal advice.

PECOS enrollment status

Participating (accepts Medicare assignment)

Enrollment effective: 2005-09-29

PECOS data refreshed: 2026-05-27

Medicare revalidation (CMS due date list)

Due date not assigned yet

CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.

Enrollment records

Earliest due date

Not assigned (TBD)

CMS data updated

2026-06-01

Revalidation progress

Medicare enrolled
On CMS revalidation list
Due date assigned
Revalidate in PECOS

CMS enrollment records

Enrollment ID	Type	Specialty	State	Due date
I20050929000712	I	Nephrology	IL	TBD

What to do next

No action required while the due date shows TBD.
Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.

Verify on CMS Revalidation Lookup Tool

Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS

Medicare Utilization (FFS)

Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·

Educational use only—not medical, billing, or legal advice.

Top Medicare procedures (2023) · refreshed 2026-05-27

HCPCS	Description	Services	Beneficiaries	Medicare allowed
99232	Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	442	136	$0
99490	Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month	391	68	$0
99231	Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes	248	94	$0
90960	Dialysis services, 4 or more physician visits per month (20 years or older)	158	25	$0
99212	Established patient office or other outpatient visit, 10-19 minutes	128	103	$0

View full utilization report →

Insurance plans in this area (ZIP 60190)

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Provider's Procedures

GREGORY KOZENY (MD) performs procedures in Nephrology Physician. See the list of HCPCS codes below.

Specialty	Practice State	HCPCS Code	Description	Service Count	Beneficiary Count
NEPHROLOGY	IL	90935	Hemodialysis procedure with one physician evaluation	29	20
NEPHROLOGY	IL	90961	Dialysis services (2-3 physician visits per month), patient 20 years of age and older	34	24

Group practice members

Group practice members are other physicians who share the same Group Practice PAC ID with this doctor. When doctors form a group practice and register in PECOS as a single entity, they receive a shared identification number. This table lists all providers in the same group practice.

PAC ID: 2163328675View full group profile

Name	Specialty	State
DR. PARISHURAMA SANKEPALLY REDDY (M.D.)	Nephrology, Internal Medicine	IL
ARTHUR M MORRIS (MD)	Nephrology, Internal Medicine	IL
MRS. BEATA AGNIESZKA KISIEL (M.D.)	Nephrology, Internal Medicine	IL
SAMUEL R EBY (MD)	-	IN
MRS. MALATHI SHAH (M.D.)	N E P H R O L O G Y	IL
DR. GAUTAM K BHANUSHALI (MD)	N E P H R O L O G Y	IL
DR. NEIL D YBANEZ (MD)	Nephrology, Internal Medicine	IL
ANDREW MICHAEL PECK (MD)	N E P H R O L O G Y	IL
DR. SADAF M ELAHI (M.D.)	N E P H R O L O G Y	IL
ALI KHEIRBEK (MD)	-	IL