Peter J. Polewski, MD
Hematology & Oncology Physician · Grafton, WI
Peter J. Polewski, MD is a hematology & oncology physician with a practice address in Grafton, Wisconsin, and NPI 1659784940, issued on Jun 4, 2014. Check the license (Wisconsin 65955, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Peter J. Polewski
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 65955 WI
Self-reported in NPPES; status is on the state search - Practice location
- 975 Port Washington RD, Grafton, WI 53024
- Phone
- (262) 329-1000
- Enumerated
- Jun 4, 2014
- Record last updated
- Mar 20, 2023
- Medicaid ID
- 100062244 WI
- Medicare enrollment
- Enrolled (PECOS I20200724000053); accepts Medicare assignment
- Medical or professional school
- University Of Wisconsin School Of Medicine, 2014
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 295 in Wisconsin → Look up another NPI →
Also registered at 975 Port Washington RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Peter J. Polewski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 65955Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
9% more Medicare Part D claims than the average hematology & oncology physician in 2024
955 Medicare Part D claims for 166 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims. 40 claims were for opioids.
Most prescribed
- Eliquis101 claims
- Hydroxyurea77 claims
- Dexamethasone69 claims
- Prochlorperazine Maleate60 claims
- Abiraterone Acetate53 claims
- Prednisone50 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.
Bills Medicare through 2 group practices
- Aurora Advanced Healthcare, Inc.Grafton, WI
- Aurora Health Care Metro, Inc.Grafton, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Peter J. Polewski among 295 hematology & oncology physician records in Wisconsin
Peter J. Polewski, MD is one of 295 hematology & oncology physician records with a practice address in Wisconsin. 82% 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 77% of them.
- NPI issued2014 · 77% of these records are older, 19% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2014 · median 2004 among the 217 with a school on file
- Record last updated2023 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
5 hematology & oncology physician records list a practice address in Grafton
They are 5 of the 459 NPPES records with a practice address in Grafton, and 295 hematology & oncology physician records in Wisconsin.
All 295 in Wisconsin → Every provider in Grafton → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Justin Chau, M.D.Grafton, WI 530241871974154
- Maria GeorgenGrafton, WI 530241114488129
- John Maul, MDGrafton, WI 530241326014382
- Thomas Zukowski, MDGrafton, WI 530241912989260
- Jacob Adashek, DOGermantown, WI 530221144780107
- Timothy Goggins, M.D.Germantown, WI 530221497890701
- Stephen Strother, M.D.Brookfield, WI 530451417063231
- Michael Delatorre, M.D.Menomonee Falls, WI 530511831211861
Common questions
What is Peter J. Polewski, MD's NPI number?
Peter J. Polewski, MD's National Provider Identifier (NPI) is 1659784940, issued on Jun 4, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Peter J. Polewski, MD located?
The NPPES record lists a practice address at 975 Port Washington RD, Grafton, WI, 53024. Phone: (262) 329-1000. Providers update this record themselves, so call before visiting.
How can I verify Peter J. Polewski, MD's license?
NPPES lists Wisconsin license number 65955, 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 Peter J. Polewski, MD prescribe under Medicare Part D?
In 2024, Peter J. Polewski, MD had 955 Medicare Part D claims for 166 beneficiaries; the average among hematology & oncology physician prescribers was 877. 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.