Regan Michael Seipp, M.D.
Nephrology Physician · Winfield, IL
Regan Michael Seipp, M.D. is a nephrology physician with a practice address in Winfield, Illinois, and NPI 1306256284, issued on May 1, 2014. Check the license (Illinois 036148873, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Regan Michael Seipp
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License numbers
- 036148873 IL
50892 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 25 N Winfield RD Ste 405, Winfield, IL 60190
- Phone
- (630) 873-8889
- Enumerated
- May 1, 2014
- Record last updated
- Aug 18, 2023
- Fax
- (630) 456-7138
- Medicare enrollment
- Enrolled (PECOS I20190617001513); accepts Medicare assignment
- Medical or professional school
- Creighton University School Of Medicine, 2014
- 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 405
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Suzette Contreras, FNPFamily Nurse Practitioner1790367951
- Rohit Goel, DORheumatology Physician1609371079
- Irene Ma, MDHematology & Oncology Physician1710151105
- Kashif Mufti, MDRheumatology Physician1821290750
- Sandip Nijjar, FNP-CNurse Practitioner1215665120
- Autumn Roland, PA-CPhysician Assistant1073842993
Verify Regan Michael Seipp 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 036148873Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2% more Medicare Part D claims than the average nephrology physician in 2024
1,494 Medicare Part D claims for 299 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 22% of claims.
Most prescribed
- Torsemide169 claims
- Losartan Potassium162 claims
- Farxiga161 claims
- Amlodipine Besylate116 claims
- Furosemide114 claims
- Lisinopril114 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: $862.15
29 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. 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.
Bills Medicare through one group practice
- Dupage Medical Group LtdNaperville, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Regan Michael Seipp among 572 nephrology physician records in Illinois
Regan Michael Seipp, M.D. 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 2014, is newer than 79% of them.
- NPI issued2014 · 79% of these records are older, 19% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated2014 · median 2002 among the 433 with a school on file
- Record last updated2023 · 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
- Gregory Kozeny, MDWinfield, IL 601901861499550
- Jeffrey Kropp, MDWinfield, IL 601901902083538
- Ankit Rawal, D.O.Winfield, IL 601901891074555
- Kelly Schlotman, MDWinfield, IL 601901780175828
- Jyoti Eknoor Brar, M.B.B.S.Evanston, IL 602011609193028
Common questions
What is Regan Michael Seipp, M.D.'s NPI number?
Regan Michael Seipp, M.D.'s National Provider Identifier (NPI) is 1306256284, issued on May 1, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Regan Michael Seipp, M.D. located?
The NPPES record lists a practice address at 25 N Winfield RD Ste 405, Winfield, IL, 60190. Phone: (630) 873-8889. Providers update this record themselves, so call before visiting.
How can I verify Regan Michael Seipp, M.D.'s license?
NPPES lists Illinois license number 036148873, 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 Regan Michael Seipp, M.D. prescribe under Medicare Part D?
In 2024, Regan Michael Seipp, M.D. had 1,494 Medicare Part D claims for 299 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.