NPPES file of Aug 9, 2026

Wisconsin Medicare prescriber rankings

26,027 Wisconsin prescribers billed $4.9 billion in Medicare Part D drugs in 2024, the 21st largest of 56 states and territories. Opioids were 3.25 of every 100 of those claims (CMS), below the national 3.52.

CMS Medicare Part D Prescribers, 2024; CMS NPPES · method · Verify with CMS →

Written with AI tools from the named public files; every figure is computed from those files (how it is made).
  • Prescribers26,027
  • Part D drug cost$4.9 billion
  • Average per prescriber$187,647
  • Wrote an opioid (CMS)16,183 (62.18%)
  • Opioid claims per 100 claims (CMS)3.25

Reading the Wisconsin tables

Wisconsin's 26,027 prescribers wrote 31,645,750 Part D claims in 2024, about $187,647 in drug cost per prescriber. A high total usually reflects specialty practice, such as cancer, rheumatology or HIV care, or vaccines: 1 of the 50 largest totals are mostly vaccines, which pharmacies often bill under a standing order naming one clinician. These are billing tables, not quality ratings. PlainDoctor does not rank named prescribers by opioid share; the state's opioid figures above come from CMS's own totals.

The 50 highest Part D drug-cost totals

Prescriber (NPPES taxonomy)Drug costClaims
1Eric RobertsCardiovascular Disease Physician$31.3 million5,464
2Mark HoffmannInterventional Cardiology Physician$13.9 million11,571
3Catharine SkoogPhysician Assistant$13.2 million2,492
4Shannon O'MaharHematology & Oncology Physician$12.7 million2,751
5Areyl GoffFamily Nurse Practitioner$12.6 million2,587
6Daniel IcenogleFamily Medicine Physicianmostly vaccines, often billed by pharmacies under a standing order naming this clinician$12.2 million64,263
7Kenneth PresbergPulmonary Disease Physician$11.3 million3,167
8Christopher PetersonHematology & Oncology Physician$10.3 million2,449
9Katie ZellnerPhysician Assistant$10.2 million2,342
10Heather SandersNurse Practitioner$10.1 million4,872
11James RunoPulmonary Disease Physician$10.1 million2,711
12Amy DetznerAdult Health Nurse Practitioner$8.9 million1,526
13Shamsuddin ViraniHematology & Oncology Physician$8.5 million4,104
14Anna CluskeyMedical Physician Assistant$8.3 million7,656
15Daniel SteinGastroenterology Physician$8.0 million1,329
16Daniel MaloneRheumatology Physician$8.0 million359
17Salman WaheeduddinRheumatology Physician$7.6 million5,231
18Kelsey CramerAcute Care Nurse Practitioner$7.5 million2,205
19Abdel Hai AlqwasmiHematology & Oncology Physician$7.0 million3,426
20Meghan WellsSurgical Physician Assistant$6.7 million2,064
21Marlon NavarroRheumatology Physician$6.7 million3,679
22Ashley SchumacherFamily Nurse Practitioner$6.4 million1,275
23Samantha RobeNurse Practitioner$6.3 million1,615
24Corey ShamahHematology & Oncology Physician$6.2 million1,682
25Dimitrios FanopoulosRheumatology Physician$6.2 million6,641
26Daniel RosenbergAllergy & Immunology Physician$6.2 million796
27David KnightHematology & Oncology Physician$6.0 million2,597
28Angela KrausNurse Practitioner$6.0 million2,119
29Eric GowingRheumatology Physician$5.9 million11,926
30Timothy BurnsMedical Oncology Physician$5.7 million2,035
31Eyad Al-HattabMedical Oncology Physician$5.5 million1,573
32Anand PatelMedical Oncology Physician$5.5 million2,321
33Julie BillerPulmonary Disease Physician$5.5 million1,663
34Adam LevinHematology & Oncology Physician$5.5 million1,438
35Lisa BrayNurse Practitioner$5.2 million1,719
36David PhamCardiovascular Disease Physician$5.2 million2,111
37Prakash ShahCardiovascular Disease Physician$5.1 million33,995
38David LewandowskiCardiovascular Disease Physician$5.1 million1,841
39Sandeep BasuMedical Oncology Physician$5.1 million2,805
40Adria Madera AcostaRheumatology Physician$5.0 million2,857
41Ariel SingerNurse Practitioner$4.9 million784
42Daniel LongNeurology Physician$4.9 million3,383
43Timothy SchmidtHematology & Oncology Physician$4.9 million1,315
44Adam SiegelHematology & Oncology Physician$4.8 million2,710
45Sarfraz SidhuInternal Medicine Physician$4.8 million70,096
46Muhammad JanInterventional Cardiology Physician$4.8 million18,994
47Antony RuggeriHematology & Oncology Physician$4.7 million1,877
48Laura SchroederPhysician Assistant$4.7 million1,362
49Benjamin ParsonsHematology & Oncology Physician$4.6 million1,342
50Evgenia RaichlinCardiovascular Disease Physician$4.6 million1,798

Source: CMS Medicare Part D Prescribers by Provider, 2024 (data.cms.gov), matched to CMS NPPES by NPI; vaccine share from the prescriber's top drugs in the CMS by-provider-and-drug file. Specialty is the taxonomy the clinician reported to NPPES.

Common questions

How many Medicare prescribers are in Wisconsin?

Wisconsin has 26,027 Medicare Part D prescribers who filed 31,645,750 claims totaling $4.9 billion in drug costs.

What is the opioid prescribing rate in Wisconsin?

Opioids were 3.25 of every 100 Medicare Part D claims written by Wisconsin prescribers in 2024, against 3.52 nationally (CMS). 16,183 of the state's 26,024 Part D prescribers in CMS's geography file (62.18%) wrote at least one opioid.

Checking a prescriber

Open the prescriber's record for the full NPI entry and prescribing detail, then confirm the license on the state board search. The Part D file covers Medicare Part D only; commercial, Medicaid, VA and cash prescriptions are not in it.

Prescriber rankings in other states

  1. Alabama
  2. Alaska
  3. American Samoa
  4. Arizona
  5. Arkansas
  6. California
  7. Colorado
  8. Connecticut
  9. Delaware
  10. District of Columbia
  11. Florida
  12. Georgia
  13. Guam
  14. Hawaii
  15. Idaho
  16. Illinois
  17. Indiana
  18. Iowa
  19. Kansas
  20. Kentucky
  21. Louisiana
  22. Maine
  23. Maryland
  24. Massachusetts
  25. Michigan
  26. Minnesota
  27. Mississippi
  28. Missouri
  29. Montana
  30. Nebraska
  31. Nevada
  32. New Hampshire
  33. New Jersey
  34. New Mexico
  35. New York
  36. North Carolina
  37. North Dakota
  38. Northern Mariana Islands
  39. Ohio
  40. Oklahoma
  41. Oregon
  42. Pennsylvania
  43. Puerto Rico
  44. Rhode Island
  45. South Carolina
  46. South Dakota
  47. Tennessee
  48. Texas
  49. Utah
  50. Vermont
  51. Virgin Islands
  52. Virginia
  53. Washington
  54. West Virginia
  55. Wisconsin
  56. Wyoming

National prescriber rankings · All rankings

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 Medicare Part D data year 2024 (CMS).