Robert Stephen Nierzwicki, M.D.
Cardiovascular Disease Physician · Winfield, IL
Robert Stephen Nierzwicki, M.D. is a cardiovascular disease physician with a practice address in Winfield, Illinois, and NPI 1194985564, issued on Jun 10, 2008. Check the license (Illinois 036123450, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Robert Stephen Nierzwicki
- Credential
- M.D.
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- 036123450 IL
Self-reported in NPPES; status is on the state search - Practice location
- 25 N Winfield RD Ste 500, Winfield, IL 60190
- Phone
- (630) 232-0280
- Enumerated
- Jun 10, 2008
- Record last updated
- Jun 3, 2024
- Fax
- (630) 232-3895
- Medicaid ID
- 036123450 IL
- Medicare enrollment
- Enrolled (PECOS I20120919000812); accepts Medicare assignment
- Medical or professional school
- Loyola University Of Chicago, Stritch School Of Medicine, 2006
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 1,073 in Illinois → Look up another NPI →
Also registered at 25 N Winfield RD Ste 500
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Georgios Christopoulos, MDClinical Cardiac Electrophysiology Physician1003294422
- Susan Collazo, APRN, CNPNurse Practitioner1043422819
- Giselle Corsiga, APN , CNPNurse Practitioner1326521121
- Kaleigh Evans, M.D.Cardiovascular Disease Physician1770901852
- Robin Fortman, APRN, CNPNurse Practitioner1740210558
- Janki Gandhi, PA-CPhysician Assistant1962556944
Verify Robert Stephen Nierzwicki 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 036123450Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
44% more Medicare Part D claims than the average cardiovascular disease physician in 2024
4,438 Medicare Part D claims for 702 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Metoprolol Succinate473 claims
- Atorvastatin Calcium423 claims
- Eliquis315 claims
- Rosuvastatin Calcium305 claims
- Furosemide250 claims
- Ezetimibe208 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.
The MIPS final score for 2023 (Medicare payment program): 94.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Northwestern Medical Faculty FoundationWinfield, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert Stephen Nierzwicki among 1,073 cardiovascular disease physician records in Illinois
Robert Stephen Nierzwicki, M.D. is one of 1,073 cardiovascular disease physician records with a practice address in Illinois. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 56% of them.
- NPI issued2008 · 56% of these records are older, 38% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2006 · median 2001 among the 688 with a school on file
- Record last updated2024 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
19 cardiovascular disease physician records list a practice address in Winfield
They are 19 of the 778 NPPES records with a practice address in Winfield, and 1,073 cardiovascular disease physician records in Illinois.
All 1,073 in Illinois → Every provider in Winfield → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Neil Agruss, M.D.Winfield, IL 601901780661736
- James Carroll, M.D.Winfield, IL 601901841272432
- David Cooke, MDWinfield, IL 601901942234430
- Thomas Discher, MDWinfield, IL 601901518905819
- Dennis Karsh, MDWinfield, IL 601901588630552
- James Kinn, MDWinfield, IL 601901679527998
- George Nijmeh, M.D.Winfield, IL 601901366645046
- Patrick O'Leary, MDWinfield, IL 601901942278890
Common questions
What is Robert Stephen Nierzwicki, M.D.'s NPI number?
Robert Stephen Nierzwicki, M.D.'s National Provider Identifier (NPI) is 1194985564, issued on Jun 10, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Robert Stephen Nierzwicki, M.D. located?
The NPPES record lists a practice address at 25 N Winfield RD Ste 500, Winfield, IL, 60190. Phone: (630) 232-0280. Providers update this record themselves, so call before visiting.
How can I verify Robert Stephen Nierzwicki, M.D.'s license?
NPPES lists Illinois license number 036123450, 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 Robert Stephen Nierzwicki, M.D. prescribe under Medicare Part D?
In 2024, Robert Stephen Nierzwicki, M.D. had 4,438 Medicare Part D claims for 702 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. Part D covers Medicare prescriptions only.
What is Robert Stephen Nierzwicki, M.D.'s MIPS final score?
The 2023 MIPS final score is 94.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.