Michelle Mary Kolton Mackay, M.D.
Radiation Oncology Physician · Madison, WI
Michelle Mary Kolton Mackay, M.D. is a radiation oncology physician with a practice address in Madison, Wisconsin, and NPI 1013179928, issued on Jul 1, 2008. Check the license (Wisconsin 52849-020, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Michelle Mary Kolton Mackay
- Credential
- M.D.
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License numbers
- 52849-020 WI
MT184232 PA
Self-reported in NPPES; status is on the state search - Practice location
- 1104 John Nolen Dr, Madison, WI 53713
- Phone
- (608) 251-6868
- Enumerated
- Jul 1, 2008
- Record last updated
- Mar 8, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (608) 251-4255
- Medicare enrollment
- Enrolled (PECOS I20090923000713); accepts Medicare assignment
- Medical or professional school
- University Of Wisconsin School Of Medicine, 2004
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 153 in Wisconsin → Look up another NPI →
Also registered at 1104 John Nolen Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Richard Auchter, MDRadiation Oncology Physician1366404329
- Rise Futterer, MDPsychiatry Physician1922169077
- John Hayes, M.D.Radiation Oncology Physician1093770943
- June Kim, MDRadiation Oncology Physician1760488092
- Anne Koplin, MDPsychiatry Physician1457444374
- Timothy Kruser, M.D.Radiation Oncology Physician1053576926
Verify Michelle Mary Kolton Mackay in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 52849-020Check 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% fewer Medicare Part D claims than the average radiation oncology physician in 2024
122 Medicare Part D claims for 50 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D.
Most prescribed
- Tamsulosin Hcl26 claims
- Dexamethasone21 claims
- Ondansetron Hcl15 claims
- Lidocaine Hcl Viscous13 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): 100 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).
Bills Medicare through one group practice
- Shared Magnetic Resonance Imaging Facility IncMadison, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michelle Mary Kolton Mackay among 153 radiation oncology physician records in Wisconsin
Michelle Mary Kolton Mackay, M.D. is one of 153 radiation oncology physician records with a practice address in Wisconsin. 88% 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 50% of them.
- NPI issued2008 · 50% of these records are older, 43% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 78% of these records are
- Graduated2004 · median 2008 among the 119 with a school on file
- Record last updated2021 · 44% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in Wisconsin
There are 153 radiation oncology physician records in Wisconsin.
All 153 in Wisconsin → Every provider in Madison → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Richard Auchter, MDMadison, WI 537131366404329
- John Hayes, M.D.Madison, WI 537131093770943
- June Kim, MDMadison, WI 537131760488092
- Timothy Kruser, M.D.Madison, WI 537131053576926
- Ming Teng, M.D.Madison, WI 537131306801790
- Michael Zinda, M.D.Madison, WI 537131013972983
- Gregory Cooley, MDMadison, WI 537181558302778
- Scot Callahan, MD, PHDMadison, WI 537051700527959
Common questions
What is Michelle Mary Kolton Mackay, M.D.'s NPI number?
Michelle Mary Kolton Mackay, M.D.'s National Provider Identifier (NPI) is 1013179928, issued on Jul 1, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Michelle Mary Kolton Mackay, M.D. located?
The NPPES record lists a practice address at 1104 John Nolen Dr, Madison, WI, 53713. Phone: (608) 251-6868. Providers update this record themselves, so call before visiting.
How can I verify Michelle Mary Kolton Mackay, M.D.'s license?
NPPES lists Wisconsin license number 52849-020, 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 Michelle Mary Kolton Mackay, M.D. prescribe under Medicare Part D?
In 2024, Michelle Mary Kolton Mackay, M.D. had 122 Medicare Part D claims for 50 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
What is Michelle Mary Kolton Mackay, M.D.'s MIPS final score?
The 2023 MIPS final score is 100 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.