NPPES file of Aug 9, 2026

Radiation Oncology Physician in Colorado

111 NPPES records list radiation oncology physician with a practice address in Colorado, 1.9 per 100,000 residents, the 32nd highest rate of 51. Aurora and Denver have the most; each record links to the provider's NPI and the Colorado license search. Page 2 of 3.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 2085R0001X · method

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

Aurora has the most, 21

  1. Aurora21
  2. Denver14
  3. Colorado Springs13
  4. Grand Junction6
  5. Fort Collins5

Radiation Oncology Physician records in Colorado

  1. Charles Leonard, MDLittleton, CO 801201811971963
  2. Calvin Lewis, MDGreenwood Village, CO 801111841731130
  3. Meng Lim, M.D.Fort Collins, CO 805281669401642
  4. Gwen Lisella, M.D.Fort Collins, CO 805281457397440
  5. Arthur Liu, MDAurora, CO 800451144288093
  6. Michelle Ludwig, M.D.Aurora, CO 800451316269269
  7. David Marcus, M.D.Carbondale, CO 816231306089362
  8. Charles Mateskon, MDLone Tree, CO 801241639279763
  9. Rebekah Maymani, MDLongmont, CO 805041164716403
  10. Gwendolyn McGinnis, MD, MCRThornton, CO 802601326471194
  11. Lee McNeely, M.D.Littleton, CO 801221285618835
  12. Sarah Milgrom, M.D.Aurora, CO 800451992937312
  13. Gayle Miller, M.D.Grand Junction, CO 815051033117643
  14. Paul Mitchell, MDColorado Springs, CO 809091770567315
  15. Alan Monroe, M.D.Colorado Springs, CO 809071932175155
  16. Marina Moskalenko, MDWestminster, CO 800231396277182
  17. Blair Murphy, M.D.Aurora, CO 800451952780512
  18. David Nagel, M.D.Aurora, CO 800451336143106
  19. Mihir Naik, D.O.Colorado Springs, CO 809091699090647
  20. Sameer Nath, M.D.Aurora, CO 800451669774386
  21. Jeffrey Olsen, MDColorado Springs, CO 809091598912735
  22. Lincoln Pao, M.D.Lafayette, CO 800261245344431
  23. Dario PasalicBoulder, CO 803031174985097
  24. Meera Patel, M.D.Aurora, CO 800121619052529
  25. Brandon Patton, MDDenver, CO 802181659572758
  26. Joshua Petit, M.D.Fort Collins, CO 805281710053681
  27. Thomas Pugh, MDDenver, CO 802111174679799
  28. David Raben, MDAurora, CO 800451982711727
  29. Rachel Rabinovitch, MDAurora, CO 800451164539904
  30. Seth Reiner, M.D.Denver, CO 802101497887624
  31. Patrick Richard, M.D./M.P.H.Boulder, CO 803031134418890
  32. Jane Ridings, M.D.Colorado Springs, CO 809091285614222
  33. Tyler Robin, MDAurora, CO 800451013322577
  34. Douglas Rock, M.D.Grand Junction, CO 815011275531725
  35. Richard Ross, MDColorado Springs, CO 809091508325333
  36. Peter Rossi, M.D.Glenwood Springs, CO 816011851338545
  37. Tracey Schefter, MDAurora, CO 800451609983444
  38. Kevin Schewe, M.D.Thornton, CO 802601902883952
  39. John Schiller, M.D.Colorado Springs, CO 809071083694137
  40. Jacob Shabason, MDLone Tree, CO 801241700176534
  41. Lauren Shapiro, MDMorrison, CO 804651699933135
  42. Charles Simpson, M.D.Lafayette, CO 800261871527754
  43. Suraj Singh, MDGreely, CO 806311962504704
  44. Damon Smith, M.D.Lone Tree, CO 801241760480123
  45. John Sohayda, MDLone Tree, CO 801241063549632
  46. John Stageberg, M.D.Pueblo, CO 810041861457640
  47. Matthew Stenmark, M.D.Lafayette, CO 800261861692436
  48. Daniel Tandberg, M.D.Colorado Springs, CO 809071306280573
  49. Andrew Tanner, MDColorado Springs, CO 809071679501456
  50. Katherine Tzou, MDAurora, CO 800451053530691

Source: CMS NPPES, primary taxonomy 2085R0001X: records by practice city and the list of records, file of Aug 9, 2026.

Colorado ranks 32 of 51 per resident

  1. Hawaii2.0
  2. Kentucky1.9
  3. Maine1.9
  4. Colorado1.9
  5. California1.9
  6. Nebraska1.9
  7. 50 states and D.C.2.1

Source: CMS NPPES, primary taxonomy 2085R0001X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

86.5% of these records appear in a Medicare file, against 82.3% 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. Colorado86.5%
  2. United States82.3%

Radiation Oncology Physician records in Colorado, measured

  • In a Medicare file96 of 111 · 86.5% here, 82.3% nationally
  • In the CMS Doctors and Clinicians file88 · 79.3% here, 74.0% nationally
  • Not updated in five years or more55 · 49.5% here, 54.6% nationally
  • Median graduation year2007 · the 88 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 2085R0001X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

111 NPPES records list radiation oncology physician (2085R0001X) as their primary taxonomy with a practice address in Colorado: 1.9 per 100,000 residents against 2.1 nationally (50 states and D.C.). Aurora has 21 of them (19%).

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. Oregon115
  2. Maryland124
  3. Tennessee132
  4. Kentucky88

States with a similar rate per 100,000

  1. California1.9
  2. Nebraska1.9
  3. Maine1.9
  4. Delaware1.8

The largest states

  1. California735
  2. Florida520
  3. New York449
  4. Texas449
  5. Pennsylvania383

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.