NPPES file of Aug 9, 2026

Dermatology Physician in Wisconsin

325 NPPES records list dermatology physician with a practice address in Wisconsin, 5.5 per 100,000 residents, the 10th highest rate of 51. Madison and Milwaukee have the most; each record links to the provider's NPI and the Wisconsin license search. Page 3 of 7.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207N00000X · method

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Madison has the most, 68

  1. Madison68
  2. Milwaukee39
  3. Brookfield19
  4. Eau Claire13
  5. Green Bay11

Dermatology Physician records in Wisconsin

  1. Michael GuiMadison, WI 537921457105942
  2. Ronald Hamrick, MDMilwaukee, WI 532261447542162
  3. Bredesen Hartmann, MDNew Berlin, WI 531511003480708
  4. Lori Heinrich, MDMequon, WI 530921184719288
  5. Barry Hellman, MDWest Bend, WI 530951215044821
  6. Sidney Herszenson, M.D.Milwaukee, WI 532261841264074
  7. Daniel Hertel, M.D.Green Bay, WI 543111285047373
  8. Camile Hexsel Folk, M.D.Madison, WI 537151295936326
  9. Patrice Hicks, MDEau Claire, WI 547011720055056
  10. Molly Hinshaw, MDMadison, WI 537171275589418
  11. Thomas Hogarty, M.D.Onalaska, WI 546501790761682
  12. Michele Holder, MDMenasha, WI 549521598741803
  13. Kassandra Holzem, M.D.Milwaukee, WI 532261568882793
  14. Ryan Holzwarth, MDChippewa Falls, WI 547291437102324
  15. Sarah Hostetler, MDWausau, WI 544011861654014
  16. Stephen HumphreyMilwaukee, WI 532261417246257
  17. Steven Hunter, MDSummit, WI 530661477660991
  18. Sam Hwang, M.D., PH.D.Milwaukee, WI 532261760500813
  19. Namita Jain, M.D.Milwaukee, WI 532091205253242
  20. Renata Jenkin, MDMarshfield, WI 544491700848462
  21. Hadley Johnson, MDMadison, WI 537921245085356
  22. Daniel Jones, MDEau Claire, WI 547011912156092
  23. Marianne JunckGermantown, WI 530221275832461
  24. Charles Kagen, M.D.Appleton, WI 549111114015674
  25. Jesse Kasim, MDMenomonee Falls, WI 530511437788973
  26. Henry Katz, M.D.Manitowoc, WI 542201154586592
  27. Peter Katz, MDAppleton, WI 549131477725141
  28. Thomas Keenan, M.D.Madison, WI 537151285912402
  29. Michael Kehoe, M.D.Wausau, WI 544011477870194
  30. Susan Keiler, M.D.Sheboygan, WI 530811063602811
  31. Julianne Kiene, MDMarshfield, WI 544491265134480
  32. Kristina Kleven, MDBrookfield, WI 530051518950153
  33. Daniel Knabel, M.D.Wauwatosa, WI 532261275920639
  34. Michael KnabelMequon, WI 530971295231769
  35. Peter Knabel, D.O.Waukesha, WI 531861245543495
  36. Kristi Knuijt, MDJanesville, WI 535461619928918
  37. Sarah Korger, MDMadison, WI 537151861996688
  38. Dan KrakoraHudson, WI 540161548622863
  39. Amanda Krenitsky, MDMilwaukee, WI 532261811516032
  40. Kirsten Krohn, M.D.Beaver Dam, WI 539161316365737
  41. Travis KuemmetWauwatosa, WI 532261588027023
  42. Gary Lamps, M.D.Neenah, WI 549561144258344
  43. Charlotte Lasenna, MDMadison, WI 537171538521521
  44. Brian Lee, M.D.Waukesha, WI 531881083052690
  45. William Lefeber, MDMilwaukee, WI 532091235124595
  46. Stephen Lewellis, M.D., PH.D.Plover, WI 544671891152641
  47. Michelle Lewis, MDAppleton, WI 549131801802046
  48. Rita Lloyd, MDMadison, WI 537031497724629
  49. James Lynott, MDMount Pleasant, WI 534061649277658
  50. Giacomo Maggiolino, M.D.Kenosha, WI 531421699924100

Source: CMS NPPES, primary taxonomy 207N00000X: records by practice city and the list of records, file of Aug 9, 2026.

Wisconsin ranks 10 of 51 per resident

  1. South Dakota5.8
  2. Minnesota5.7
  3. Maryland5.5
  4. Wisconsin5.5
  5. Florida5.4
  6. California5.3
  7. 50 states and D.C.4.7

Source: CMS NPPES, primary taxonomy 207N00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

81.8% of these records appear in a Medicare file, against 84.6% nationally

A Medicare file here is Part D prescribing (2024), a MIPS score (2023), an Open Payments record (2024) or Medicare group billing (CMS Doctors and Clinicians). A record outside them may still see patients: these files cover Medicare only.

  1. Wisconsin81.8%
  2. United States84.6%

Dermatology Physician records in Wisconsin, measured

  • In a Medicare file266 of 325 · 81.8% here, 84.6% nationally
  • In the CMS Doctors and Clinicians file228 · 70.2% here, 72.6% nationally
  • Not updated in five years or more141 · 43.4% here, 54.0% nationally
  • Median graduation year2009 · the 228 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207N00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

325 NPPES records list dermatology physician (207N00000X) as their primary taxonomy with a practice address in Wisconsin: 5.5 per 100,000 residents against 4.7 nationally (50 states and D.C.). Madison has 68 of them (21%).

A record is a registration a provider made and keeps up to date: it shows neither that the provider is licensed nor that they still practice there. The state's own license search is the check.

States with a similar number

  1. Minnesota327
  2. Maryland341
  3. Colorado305
  4. Georgia349

States with a similar rate per 100,000

  1. Florida5.4
  2. California5.3
  3. Pennsylvania5.3
  4. Utah5.2

The largest states

  1. California2,083
  2. Florida1,213
  3. New York1,211
  4. Texas1,172
  5. Pennsylvania681

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy; 2023 Census population estimates. A registry record 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.