NPPES file of Aug 9, 2026

Pediatric Hematology & Oncology Physician in Colorado

89 NPPES records list pediatric hematology & oncology physician with a practice address in Colorado, 1.5 per 100,000 residents, the 8th highest rate of 50. Aurora and Denver have the most; each record links to the provider's NPI and the Colorado license search. Page 2 of 2.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 2080P0207X · 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, 77

  1. Aurora77
  2. Denver8
  3. Colorado Springs1
  4. Durango1
  5. Englewood1

Pediatric Hematology & Oncology Physician records in Colorado

  1. Michael Leibowitz, M.D./PH.D.Aurora, CO 800451508122540
  2. Michael Levien, MDAurora, CO 800451235193301
  3. Katherine LindAurora, CO 800451831694504
  4. Holly Lindsay, MDAurora, CO 800451295009678
  5. Margaret Macy, MDAurora, CO 800451063559342
  6. Kelly Maloney, MDAurora, CO 800451730264482
  7. Marilyn Manco-Johnson, MDAurora, CO 800451942384672
  8. Christopher McKinney, MDAurora, CO 800451558599076
  9. Laura McLaughlin, MDAurora, CO 800451013303098
  10. Shelby Mestnik, DOAurora, CO 800451356908909
  11. Zaher Naji, MDAurora, CO 800451497857528
  12. Taizo Nakano, M.D.Aurora, CO 800451508021015
  13. Tobias Neff, M.D.Aurora, CO 800451154598621
  14. Anandani Nellan, MDAurora, CO 800451619291101
  15. Christopher Ng, M.D.Aurora, CO 800451205090271
  16. Rachelle Nuss, MDAurora, CO 800451013092741
  17. Maureen O'Brien, M.D.Aurora, CO 800451710194881
  18. Braden Olsen, MDAurora, CO 800451316528169
  19. Stephen Palmer, M.D.Littleton, CO 801221417959107
  20. Maria Pereda Ginocchio, M.DAurora, CO 800451720461387
  21. Roohie Poonia, MDDenver, CO 802051801357470
  22. Christopher Porter, MDAurora, CO 800451346334133
  23. Ralph Quinones, MDAurora, CO 800451972688604
  24. Lisa Reaves, MDAurora, CO 800451437296720
  25. Lara Riegler, MDDenver, CO 802051710121488
  26. Ashley Rogers, MDAurora, CO 800451154477826
  27. Sanam Shahid, MDAurora, CO 800451932554359
  28. Christopher Silliman, MDAurora, CO 800451346325073
  29. Leonora Slatnick, M.D.Aurora, CO 800451164886214
  30. Anna Sowa, MDAurora, CO 800451265928857
  31. Melanie Stall, MDAurora, CO 800451013443753
  32. Akhila Vadivelan, MDAurora, CO 800451871016352
  33. John Van Doorninck, MDDenver, CO 802051194970350
  34. Michael Verneris, MDAurora, CO 800451336240332
  35. Rajeev Vibhakar, MDAurora, CO 800451699753376
  36. Raymond Walston, M.D.Aurora, CO 800451790176873
  37. Michael Wang, MDAurora, CO 800451588749238
  38. Beth Warren, MDAurora, CO 800451215179809
  39. Julie Zimbelman, MDDenver, CO 802051518055532

Source: CMS NPPES, primary taxonomy 2080P0207X: records by practice city and the list of records, file of Aug 9, 2026.

Colorado ranks 8 of 50 per resident

  1. Pennsylvania1.7
  2. Ohio1.6
  3. Missouri1.6
  4. Colorado1.5
  5. Maryland1.5
  6. New York1.5
  7. 50 states and D.C.1.1

Source: CMS NPPES, primary taxonomy 2080P0207X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

60.7% of these records appear in a Medicare file, against 50.9% 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. Colorado60.7%
  2. United States50.9%

Pediatric Hematology & Oncology Physician records in Colorado, measured

  • In a Medicare file54 of 89 · 60.7% here, 50.9% nationally
  • In the CMS Doctors and Clinicians file42 · 47.2% here, 31.2% nationally
  • Not updated in five years or more50 · 56.2% here, 54.5% nationally
  • Median graduation year2011 · the 42 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 2080P0207X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

89 NPPES records list pediatric hematology & oncology physician (2080P0207X) as their primary taxonomy with a practice address in Colorado: 1.5 per 100,000 residents against 1.1 nationally (50 states and D.C.). Aurora has 77 of them (87%).

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. North Carolina86
  2. Maryland93
  3. Indiana79
  4. Missouri99

States with a similar rate per 100,000

  1. New York1.5
  2. Rhode Island1.5
  3. Ohio1.6
  4. Pennsylvania1.7

The largest states

  1. California417
  2. Texas319
  3. New York289
  4. Pennsylvania218
  5. Massachusetts197

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.