Paul J. Warren, MD
Nephrology Physician · Milwaukee, WI
Paul J. Warren, MD is a nephrology physician with a practice address in Milwaukee, Wisconsin, and NPI 1487646477, issued on Aug 17, 2005. Check the license (Wisconsin 30363, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Paul J. Warren
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License numbers
- 30363 WI
30636 WI
Self-reported in NPPES; status is on the state search - Practice location
- 3120 South 27TH Street, Milwaukee, WI 53215
- Phone
- (414) 672-8282
- Enumerated
- Aug 17, 2005
- Record last updated
- Jan 14, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (414) 672-8282
- Medicaid ID
- 31989700 WI
- Medicare enrollment
- Enrolled (PECOS I20100824000957); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 3120 South 27TH Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Claire Fritsche, MDNephrology Physician1548252547
- Vasundhara Ganne, MDNephrology Physician1053303057
- William Kraklow, MDNephrology Physician1184616187
- Nichole Melton, APRNAdult Health Nurse Practitioner1750555363
- Kathleen Uy, MDNephrology Physician1255323259
- Gregory Warren, MDNephrology Physician1649262544
Verify Paul J. Warren in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 30363Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
41% more Medicare Part D claims than the average nephrology physician in 2024
2,071 Medicare Part D claims for 401 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims.
Most prescribed
- Calcitriol336 claims
- Furosemide216 claims
- Spironolactone185 claims
- Amlodipine Besylate181 claims
- Losartan Potassium158 claims
- Lisinopril140 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: $45.42
2 payments; by number, the most common kind was food and beverage; the largest payer was Akebia Therapeutics 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.
Bills Medicare through 2 group practices
- Aurora Medical Group, Inc.Burlington, WI
- Midwest Nephrology Associates SCMilwaukee, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nephrology Physician providers in Wisconsin
There are 207 nephrology physician records in Wisconsin.
Other nephrology physician records in Wisconsin
- Pablo Abrego, MDWausau, WI1689774317
- Uzoamaka Achufusi, MBBSFitchburg, WI1154558773
- Christopher Adams, MDLa Crosse, WI1760521769
- Venkata Adavikolanu, MDGreen Bay, WI1568804078
- Omer Afzal, M.D.Waukesha, WI1952393944
- Osaid Ahmad, MDNeenah, WI1689618589
- Edward Ahrens, M.D.Madison, WI1225119522
- Manohar Ahuja, M.D.Milwaukee, WI1467426064
- Wadad Ailabouni, MDMarshfield, WI1811196355
- Adedamola AkinsikuMilwaukee, WI1619715760
Common questions
What is Paul J. Warren, MD's NPI number?
Paul J. Warren, MD's National Provider Identifier (NPI) is 1487646477, issued on Aug 17, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Paul J. Warren, MD located?
The NPPES record lists a practice address at 3120 South 27TH Street, Milwaukee, WI, 53215. Phone: (414) 672-8282. Providers update this record themselves, so call before visiting.
How can I verify Paul J. Warren, MD's license?
NPPES lists Wisconsin license number 30363, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Paul J. Warren, MD prescribe under Medicare Part D?
In 2024, Paul J. Warren, MD had 2,071 Medicare Part D claims for 401 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.