NPPES file of Aug 9, 2026

Anesthesiology Physician in Colorado

1,202 NPPES records list anesthesiology physician with a practice address in Colorado, 20 per 100,000 residents, the 12th highest rate of 51. Denver and Aurora have the most; each record links to the provider's NPI and the Colorado license search. Page 17 of 25.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207L00000X · method

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

Denver has the most, 225

  1. Denver225
  2. Aurora163
  3. Greenwood Village155
  4. Colorado Springs120
  5. Fort Collins66

Anesthesiology Physician records in Colorado

  1. Alexander Nelsen, DOGreenwood Village, CO 801111740801273
  2. Daniel Nelson, MDGrand Junction, CO 815011093775728
  3. Joshua Nelson, MDUsaf Academy, CO 808401629430400
  4. Eric Ness, MDColorado Springs, CO 809091821417767
  5. Stefanie Neubauer, MDEnglewood, CO 801101427037571
  6. Adrian Newens, MDDenver, CO 802031376589861
  7. Tessa Newman, D.O.Pueblo, CO 810031679992507
  8. Kimberly Ngo, M.D.Englewood, CO 801101487811238
  9. Tam Nguyen, M.D.Thornton, CO 802291497010573
  10. Thomas Nicholas, MDColorado Springs, CO 809091437194487
  11. Dean Nichols, MDDenver, CO 802031437187911
  12. Robert Nieder, M.D.Englewood, CO 801131275857278
  13. Christopher Nightengale, MDDenver, CO 802031760469746
  14. Stephanie Nill, MDAurora, CO 800451043716566
  15. Brian Nimer, MDColorado Springs, CO 809091477503183
  16. Al Nitka, M.D.Lakewood, CO 802281194768093
  17. Darrell Nivens, MDLouisville, CO 800271518916428
  18. Margaret Norsworthy, MDLakewood, CO 802281174531578
  19. Theresa Northern, DOColorado Springs, CO 809091326206210
  20. Edward Nortier, MDLafayette, CO 800261366579377
  21. Lillian Nosow, MDGolden, CO 804011427787886
  22. David Nowick, MDDenver, CO 802031508843632
  23. Michael Nunez, M.D.Colorado Springs, CO 809071902874936
  24. Rachel Nunn, MDLafayette, CO 800261285761239
  25. Jeremy Nussbaumer, MDGreenwood Village, CO 801111407836745
  26. Dexter Nye, MDGreenwood Village, CO 801111942763669
  27. Michael O'Callaghan, MDDenver, CO 802031033256318
  28. Sean O'Connor, MDAurora, CO 800451790835049
  29. Taylor O'Neal, MDGreenwood Village, CO 801111154827194
  30. Frederick Oakes, MDGlenwood Spgs, CO 816011558333856
  31. Ruta Obergfell, MDColorado Springs, CO 809091114182052
  32. Ryan Oblachinski, DOEnglewood, CO 801101720053812
  33. Michael Ochs, DODenver, CO 802031497732523
  34. Stephen Ochs, MDBoulder, CO 803021316052681
  35. Daniella Ohnemus, MDGreenwood Village, CO 801111609240290
  36. Obianuju Okocha, M.D.Aurora, CO 800451851438139
  37. Anthony Oliva, MD, PHDAurora, CO 800451316174915
  38. Kimberlee Olsen, M.D.Fort Collins, CO 805241083830111
  39. Nathan Olsen, MDGreenwood Village, CO 801111831164391
  40. Lloyd Olson, M.D.Colorado Springs, CO 809071417941899
  41. Michael Orser, M.D.Colorado Springs, CO 809231528402211
  42. Tania Orzynski, MDDenver, CO 802031801873955
  43. Donald Osborn, MDEnglewood, CO 801101306829700
  44. Luke Osborne, M.D.Denver, CO 802051568497873
  45. Kevin Owen, MDEnglewood, CO 801101932174034
  46. James Packer, MDDenver, CO 802041598870867
  47. David Paez, MDDenver, CO 802031245217397
  48. Tyler Pagel, M.D.Lakewood, CO 802281649561218
  49. Jeffrey Pal, M.D.Steamboat Springs, CO 804871447341078
  50. Matthew Palcso, MDDenver, CO 802471396882676

Source: CMS NPPES, primary taxonomy 207L00000X: records by practice city and the list of records, file of Aug 9, 2026.

Colorado ranks 12 of 51 per resident

  1. Indiana21
  2. Vermont21
  3. Illinois21
  4. Colorado20
  5. Maryland20
  6. Maine20
  7. 50 states and D.C.18

Source: CMS NPPES, primary taxonomy 207L00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

74.7% of these records appear in a Medicare file, against 73.7% 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. Colorado74.7%
  2. United States73.7%

Anesthesiology Physician records in Colorado, measured

  • In a Medicare file898 of 1,202 · 74.7% here, 73.7% nationally
  • In the CMS Doctors and Clinicians file824 · 68.6% here, 67.2% nationally
  • Not updated in five years or more731 · 60.8% here, 57.8% nationally
  • Median graduation year2006 · the 824 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207L00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

1,202 NPPES records list anesthesiology physician (207L00000X) as their primary taxonomy with a practice address in Colorado: 20 per 100,000 residents against 18 nationally (50 states and D.C.). Denver has 225 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. Missouri1,153
  2. Maryland1,253
  3. Wisconsin1,313
  4. Minnesota1,042

States with a similar rate per 100,000

  1. Illinois20.5
  2. Maine20.1
  3. Vermont20.9
  4. Montana20.0

The largest states

  1. California7,571
  2. New York5,062
  3. Texas4,635
  4. Florida3,375
  5. Illinois2,575

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.