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Dr. Gregory A. Kozeny, MD
NPI1861499550
- Medicare services, 2024
- 40
- Medicare patients, 2024
- 22
- Part D claims, 2024
- 219
- Publications
- 17
- Hospital affiliations
- 1
- Practice address
- 801 South Washington, Naperville, IL 60540
- Practice phone
- Call (630) 527-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Gregory A. Kozeny is a nephrologist in Naperville, Illinois
Dr. Kozeny practices at Edward Hospital in Naperville, Illinois, part of Endeavor Health.
Dr. Kozeny's NPI, 1861499550, was assigned on July 7, 2005. Dr. Kozeny graduated from Loyola University Chicago Stritch School of Medicine in 1978. Dr. Kozeny holds Illinois license 036059588.
NPI and contact details
- NPI
- 1861499550NPI Registry (opens in a new tab)
- NPI enumeration date
- July 7, 2005
- NPI status
- Active
- Practice phone
- (630) 527-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 74
- Medical school graduation
- 1978
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Gregory A. Kozeny practices at Edward Hospital in Naperville, Illinois
Dr. Kozeny's primary practice is Edward Hospital, at 801 South Washington, Naperville, IL 60540 in Du Page County. The practice phone is (630) 527-3000.
- Edward Hospital801 South Washington, Naperville, IL 60540 · Du Page CountyPhone(630) 527-3000
Source: Dmand AI Affiliation Data
Dr. Gregory A. Kozeny is affiliated with 1 site of care
Dr. Kozeny's primary practice is Edward Hospital in Naperville, Illinois, part of Endeavor Health.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gregory A. Kozeny's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kozeny practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Edward Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory A. Kozeny is one of 534 nephrologists in Illinois
Nephrology is Dr. Kozeny's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Kozeny is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Kozeny's licenses on file in 2 states: Illinois and Wisconsin.
Specialties and state licenses
- Nephrology, IllinoisPrimary
- Wisconsin license
Clinical focus
Dmand AI lists acute kidney failure, chronic kidney disease, fluid and electrolyte imbalances and kidney disease among the conditions Dr. Kozeny treats.
Nephrologists near Dr. Kozeny
Counts of nephrologists with a Dmand AI profile, by place and practice. Each opens the list.
534nephrologists in Illinois
5nephrologists in Naperville
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Gregory A. Kozeny billed Medicare for 40 services in 2024
CMS data shows 40 Medicare services from Dr. Kozeny across 1 procedure code in 2024, for 22 Medicare patients. Medicare paid $1,925 for them. Every service was in an office.
Medicare services, 202440
Medicare patients22
Paid by Medicare$1,925
Procedure codes1
Dr. Kozeny's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,5842024: 4097%
- Tests and treatments
- 2023: 1582024: 0100%
Dr. Kozeny compared with the Illinois median for nephrologists, 2024
- Dr. Kozeny
- Illinois median
- Medicare services
- 40vs 1,28497% below
- Medicare patients
- 22vs 35794% below
- Part D claims
- 54vs 57891% below
Medians across 526 nephrologists in Illinois with Dmand AI profiles that report each measure.
Dr. Kozeny's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Kozeny and other nephrologists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory A. Kozeny treated 22 Medicare patients in 2024, average age 78
CMS counts 22 Medicare patients who saw Dr. Kozeny in 2024. 75% of them have chronic kidney disease, and 75% have high blood pressure. Their average risk score is 2.81, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Kozeny's median patient age at 68, with 29% women.
Medicare patients, 202422
Average age78
Average risk score2.81
Chronic conditions among Dr. Kozeny's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Arthritis68%
- Diabetes68%
- Mood disorders50%
Share of Medicare patients with each condition. A patient can have several.
Dr. Kozeny's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women29%
- Men71%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory A. Kozeny wrote 219 Medicare Part D claims in 2024
In 2024, Dr. Kozeny wrote 219 Medicare Part D claims for 79 patients. 88% of them were for generic drugs. CMS names the drug for 54 of them, across 4 drugs with 11 or more claims each, at $13,259 in total drug cost. In 2023, CMS named 915 claims across 29 drugs.
Part D claims, 2024219
Drugs named by CMS4
Total drug cost$13,259
Part D patients79
Dr. Kozeny's Part D claims by kind of drug, 2024
- Generic193 claims88%
- Brand-name and other26 claims12%
Dr. Kozeny's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 9152024: 5494%
Drugs named by CMS: 4 in 2024, 29 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Gregory A. Kozeny has 17 publications on record
Dmand AI links 17 papers to Dr. Kozeny. The most frequent topics are Renal Dialysis, Calcium and Catheters, Indwelling. Dr. Kozeny has published most often in Am J Nephrol.
Papers17
Topics Dr. Kozeny writes about most
- Renal Dialysis
- Calcium
- Catheters, Indwelling
- Hyperkalemia
- Subclavian Vein
- Acid-Base Equilibrium
- Acidosis, Renal Tubular
- Aldosterone
Recent publications by Dr. Kozeny
AngiographyBenzazepinesCalcium
Arch Intern Med
Catheters, IndwellingErythrocytesHaptoglobins
See who Dr. Kozeny researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Kozeny works with, so you can find a warm path to the right nephrologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Gregory A. Kozeny received $5,040 in industry payments from 2016 to 2024
CMS Open Payments shows 235 general payments to Dr. Kozeny from 31 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 96% of the total. Relypsa, Inc. paid the most, $1,256.
General payments to Dr. Kozeny by program year, 2016 to 2024
General payments to Dr. Kozeny by kind, 2016 to 2024
$5Kin total
- Food and beverage$4,82896%
- Speaker and faculty fees$2004%
- Education$120%
Companies that paid Dr. Kozeny the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gregory A. Kozeny has 1 award and honors on record
Dmand AI lists 1 award for Dr. Kozeny, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Kozeny
- 2013
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. Gregory A. Kozeny graduated from Loyola University Chicago Stritch School of Medicine
Dr. Kozeny graduated from Loyola University Chicago Stritch School of Medicine in 1978.
- Medical school
- Board certified in internal medicine
- Board certified in nephrology
Source: Dmand AI Professional Profile Data
Dr. Gregory A. Kozeny accepts plans from 8 insurance carriers
Dr. Kozeny is in network with 8 carriers, including Blue Cross Blue Shield of Michigan, Cigna and HCSC. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- Cigna
- HCSC
- Humana
- United Healthcare
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Elevance
Plan types Dr. Kozeny accepts, by number of carriers
- Medicare7
- PPO6
- HMO5
- POS5
Source: Dmand AI Insurance Network Data
Sources for Dr. Gregory A. Kozeny's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Gregory A. Kozeny
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Gregory A. Kozeny's NPI number?
Dr. Gregory A. Kozeny's NPI number is 1861499550. It was assigned on July 7, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory A. Kozeny?
Dr. Gregory A. Kozeny is a nephrologist in Naperville, Illinois. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Gregory A. Kozeny practice?
Dr. Kozeny practices at 801 South Washington, Naperville, IL 60540. Dr. Kozeny's primary practice is Edward Hospital in Naperville, Illinois, part of Endeavor Health.
What is Dr. Gregory A. Kozeny's office phone number?
The practice phone on file for Dr. Kozeny is (630) 527-3000.
What is Dr. Gregory A. Kozeny's medical license number?
Dr. Kozeny holds Illinois license 036059588, one of the licenses on file in 2 states.
Which states has Dr. Gregory A. Kozeny been licensed in?
Dmand AI has state licenses on file for Dr. Kozeny in Illinois (1979 to 2026) and Wisconsin (1990 to 2007).
Which hospitals is Dr. Gregory A. Kozeny affiliated with?
Dr. Kozeny practices at Edward Hospital in Naperville, Illinois.
Does Dr. Gregory A. Kozeny accept Medicare?
Yes. CMS data shows Dr. Kozeny billed Medicare for 40 services in 2024.
How many Medicare patients does Dr. Gregory A. Kozeny see?
CMS counts 22 Medicare patients who saw Dr. Kozeny in 2024, with an average age of 78.
Is Dr. Gregory A. Kozeny board certified?
Yes. Dr. Kozeny is board certified in internal medicine by the American Board of Internal Medicine.
Show 7 more questionsShow fewer questions
What services does Dr. Gregory A. Kozeny bill to Medicare?
In 2024, Dr. Kozeny's most billed Medicare services were care management and other visits (99490).
Where did Dr. Gregory A. Kozeny go to medical school?
Dr. Kozeny graduated from Loyola University Chicago Stritch School of Medicine in 1978.
What drugs does Dr. Gregory A. Kozeny prescribe most?
In 2024 Medicare Part D data, Dr. Kozeny's most prescribed drugs by claims were Amlodipine Besylate, Losartan Potassium and Farxiga.
Has Dr. Gregory A. Kozeny received payments from drug or device companies?
CMS Open Payments shows $5,040 in general payments to Dr. Kozeny from 31 companies from 2016 to 2024. The largest total came from Relypsa, Inc.
How long has Dr. Gregory A. Kozeny been practicing?
Dr. Kozeny graduated from medical school in 1978, 48 years ago.
Does Dr. Gregory A. Kozeny do research?
Dmand AI links 17 publications to Dr. Kozeny.
What insurance does Dr. Gregory A. Kozeny accept?
Dr. Kozeny is in network with 8 carriers, including Blue Cross Blue Shield of Michigan, Cigna and HCSC. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
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