Maxwell Sumkin Butler, MD
Family Medicine Physician · Sun Prairie, WI
Maxwell Sumkin Butler, MD is a family medicine physician with a practice address in Sun Prairie, Wisconsin, and NPI 1326787755, issued on Jun 2, 2022. Check the license (Wisconsin 85401, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Maxwell Sumkin Butler
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- 85401 WI
85401-20 WI
Self-reported in NPPES; status is on the state search - Practice location
- 2651 Windsor St, Sun Prairie, WI 53590
- Phone
- (608) 837-2206
- Enumerated
- Jun 2, 2022
- Record last updated
- Aug 7, 2026
- Medicare enrollment
- Enrolled (PECOS I20250812001613); accepts Medicare assignment
- Medical or professional school
- University Of Wisconsin School Of Medicine, 2022
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 3,765 in Wisconsin → Look up another NPI →
Also registered at 2651 Windsor St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Paige Armga, PAMedical Physician Assistant1710430459
- Jacob Bryan, M.D.Family Medicine Physician1710114657
- Maria Carwile, APNP, FNP-BCFamily Nurse Practitioner1053111260
- Lesley Coert, MDFamily Medicine Physician1053389122
- Katharine Greenfield, M.D.Family Medicine Physician1588026025
- Laura Kuhn, M.D.Family Medicine Physician1528099785
Verify Maxwell Sumkin Butler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 85401Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
76% fewer Medicare Part D claims than the average family medicine physician in 2024
839 Medicare Part D claims for 123 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate77 claims
- Atorvastatin Calcium64 claims
- Metformin Hcl38 claims
- Hydrochlorothiazide36 claims
- Gabapentin34 claims
- Lisinopril34 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 one group practice
- University OF Wisconsin Medical Foundation IncMadison, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Maxwell Sumkin Butler among 3,765 family medicine physician records in Wisconsin
Maxwell Sumkin Butler, MD is one of 3,765 family medicine physician records with a practice address in Wisconsin. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 94% of them.
- NPI issued2022 · 94% of these records are older, 4% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2022 · median 2007 among the 2,347 with a school on file
- Record last updated2026 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
26 family medicine physician records list a practice address in Sun Prairie
They are 26 of the 485 NPPES records with a practice address in Sun Prairie, and 3,765 family medicine physician records in Wisconsin.
All 3,765 in Wisconsin → Every provider in Sun Prairie → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Michael Aughey, MDSun Prairie, WI 535901285688044
- Lesley Coert, MDSun Prairie, WI 535901053389122
- Danielle Gindlesberger, MDSun Prairie, WI 535901265401574
- David Kass, DOSun Prairie, WI 535901336108307
- Nina Kinnunen, MDSun Prairie, WI 535901205888583
- Laura Kuhn, M.D.Sun Prairie, WI 535901528099785
- James Nosal, MDSun Prairie, WI 535901467406124
- James Quackenbush, MDSun Prairie, WI 535901568488658
Common questions
What is Maxwell Sumkin Butler, MD's NPI number?
Maxwell Sumkin Butler, MD's National Provider Identifier (NPI) is 1326787755, issued on Jun 2, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Maxwell Sumkin Butler, MD located?
The NPPES record lists a practice address at 2651 Windsor St, Sun Prairie, WI, 53590. Phone: (608) 837-2206. Providers update this record themselves, so call before visiting.
How can I verify Maxwell Sumkin Butler, MD's license?
NPPES lists Wisconsin license number 85401, 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 Maxwell Sumkin Butler, MD prescribe under Medicare Part D?
In 2024, Maxwell Sumkin Butler, MD had 839 Medicare Part D claims for 123 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.