Margaret Walker
Hematology & Oncology Physician · Madison, WI
Margaret Walker is a hematology & oncology physician with a practice address in Madison, Wisconsin, and NPI 1396291233, issued on Aug 31, 2016. Check the license (Wisconsin 77589-20, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Margaret Walker
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 77589-20 WI
Self-reported in NPPES; status is on the state search - Practice location
- 600 Highland Ave, Madison, WI 53792
- Phone
- (608) 263-6400
- Enumerated
- Aug 31, 2016
- Record last updated
- Jul 16, 2025
- Medicare enrollment
- Enrolled (PECOS I20230816002549); may accept Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 2020
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 295 in Wisconsin → Look up another NPI →
Also registered at 600 Highland Ave
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Verify Margaret Walker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 77589-20Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
162 Medicare Part D claims for 69 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Pantoprazole Sodium12 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 practice group's MIPS final score for 2023 (Medicare payment program): 77.4 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $30.29
1 payment: food and beverage; the largest payer was Bayer Healthcare Pharmaceuticals Inc. The 8,560 providers of this specialty with any payment received $7,481.41 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.
Margaret Walker among 295 hematology & oncology physician records in Wisconsin
Margaret Walker 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 2016, is newer than 86% of them.
- NPI issued2016 · 86% of these records are older, 11% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2020 · median 2004 among the 217 with a school on file
- Record last updated2025 · 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).
Hematology & Oncology Physician providers in Wisconsin
There are 295 hematology & oncology physician records in Wisconsin.
All 295 in Wisconsin → Every provider in Madison → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Sima Ehsani Chimeh, M.D.Madison, WI 537921699947002
- Zhubin Gahvari, M.D.Madison, WI 537921679816805
- Jacques Galipeau, MD FRCPMadison, WI 537921629307004
- Aric Hall, M.D.Madison, WI 537921538332804
- Vaishalee Kenkre, M.D.Madison, WI 537921386890978
- David Kosoff, M.D.Madison, WI 537921356608210
- Christos Kyriakopoulos, M.D.Madison, WI 537921336304211
- Sam Lubner, MDMadison, WI 537921003838145
Common questions
What is Margaret Walker's NPI number?
Margaret Walker's National Provider Identifier (NPI) is 1396291233, issued on Aug 31, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Margaret Walker located?
The NPPES record lists a practice address at 600 Highland Ave, Madison, WI, 53792. Phone: (608) 263-6400. Providers update this record themselves, so call before visiting.
How can I verify Margaret Walker's license?
NPPES lists Wisconsin license number 77589-20, 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 Margaret Walker prescribe under Medicare Part D?
In 2024, Margaret Walker had 162 Medicare Part D claims for 69 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Margaret Walker's MIPS final score?
The 2023 MIPS final score is 77.4 of 100, reported for the practice group. 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.