Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

James M. Heun, MD

Individual provider Hematology & Oncology Physician · NPI 1497713697

James M. Heun, MD practises Hematology/Oncology in Platteville, Wisconsin. Graduated from University of Iowa, Rj & L Carver College of Medicine in 2005, 21 years ago. Practices with Southwest Health Center Inc, a 113-clinician group and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
21
Trained at
University of Iowa, Rj & L Carver College of Medicine
Licensed in
WI
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1400 Eastside Rd
Platteville, WI 53818-9800
Phone: (608) 348-2331
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 49672-20 (WI)

Record details

NPI number1497713697
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 4, 2006
Last updated in NPPESOctober 21, 2025
Certification dateOctober 21, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHEMATOLOGY/ONCOLOGY
Medical schoolUNIVERSITY OF IOWA, RJ & L CARVER COLLEGE OF MEDICINE
Graduated 2005 (21 years in practice)
Group practice Southwest Health Center Inc — 113 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients326
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $113 2 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Sauk Prairie Hospital Hospital · Prairie Du Sac, WI · listed as Sauk Prairie Healthcare Inc
  • Southwest Health Center Hospital · Platteville, WI
  • Ssm Health St Clare Hospital - Baraboo Hospital · Baraboo, WI
  • Ssm Health St Mary'S Hospital - Madison Hospital · Madison, WI

Colleagues at Southwest Health Center Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 113 clinicians in the practice; 12 are shown here.