NPPES file of Aug 9, 2026

Emergency Medicine Physician in Colorado

1,434 NPPES records list emergency medicine physician with a practice address in Colorado, 24 per 100,000 residents, the 18th highest rate of 51. Denver and Aurora have the most; each record links to the provider's NPI and the Colorado license search. Page 16 of 29.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207P00000X · 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, 287

  1. Denver287
  2. Aurora246
  3. Colorado Springs145
  4. Fort Collins67
  5. Lakewood56

Emergency Medicine Physician records in Colorado

  1. Carly Loner, MDEnglewood, CO 801111043458110
  2. Gayle Long, MDDenver, CO 802181750483947
  3. Ryan Long, MDWheat Ridge, CO 804011801417605
  4. Cynthia Lonneman, MDMontrose, CO 814011538380365
  5. Matthew Loran, M.D.Boulder, CO 803031376521641
  6. Steven Lowenstein, MDAurora, CO 800451831277193
  7. Kathryn Lucas, DOPueblo, CO 810031760976831
  8. Ryan Lucas, DODenver, CO 802041730765470
  9. Deborah LundBoulder, CO 803041720066095
  10. Eric LungLone Tree, CO 801241144208513
  11. John LuttrellFort Collins, CO 805241891727160
  12. Dylan Luyten, M.D.Lakewood, CO 802261376529545
  13. Casey Lyons, D.O.Colorado Springs, CO 809071932581451
  14. Brian Macaulay, MDAurora, CO 800451588763676
  15. Lisa Maccormack, MDDenver, CO 802041245289834
  16. Stephen MacdadeBoulder, CO 803041891012688
  17. Robert Macdonald, M.D.Pueblo, CO 810031306829486
  18. Tracy Maceachern, MDFort Carson, CO 809131083662449
  19. Thomas Macfarlane, MDColorado Springs, CO 809071508814963
  20. Michael Macgillivray, MDDenver, CO 802041205323771
  21. Marlow Macht, MD, MPHDenver, CO 802041770740292
  22. Avery Mackenzie, M.D.Montrose, CO 814011942563432
  23. Scott Mackey, D.O.Pueblo, CO 810031659514792
  24. Deeksha Madala, MDDenver, CO 802041790434959
  25. Bruce Madison, M.D.Denver, CO 802461689927188
  26. Mark MaertinsLone Tree, CO 801241295786838
  27. David Magid, MDDenver, CO 802311588791537
  28. William Maguire, MDDelta, CO 814161578539052
  29. Kathryn Majors-Foley, M.D.Denver, CO 802041831518158
  30. Petrus Malherbe, MB,CHBDenver, CO 802041922744226
  31. Carl Malito, MDDelta, CO 814161205860822
  32. Sarah Malka, MDLone Tree, CO 801241114152832
  33. Heather MalmEnglewood, CO 801131780662031
  34. Michael Mandrell, M.D.Pueblo, CO 810031134547557
  35. Andrew Mapes, M.D.Aurora, CO 800171427079615
  36. Vincent Markovchick, MDDenver, CO 802041144239088
  37. Carrie Marsala, MDColorado Springs, CO 809091376526368
  38. Jean Martin, M.D.Aurora, CO 800141427036532
  39. Matthew MartinFort Collins, CO 805241932361425
  40. Natalie Martin, M.D.Vail, CO 816571194822825
  41. Frank Martinez, M.D., MPHPueblo, CO 810031831191345
  42. Joseph Martinez, M.D.Aspen, CO 816111336141449
  43. Alex Maslanka, M.D.Aurora, CO 800141689652794
  44. Kerri Mason, MDDenver, CO 802041275567711
  45. David Matero, MDAurora, CO 800451316964117
  46. John Mathers, DODurango, CO 813011508912114
  47. Jessica Mathieson, DODenver, CO 802041932311016
  48. Samantha Mauck, M.D.Englewood, CO 801111356576078
  49. Randolph Maul, MDMonument, CO 801321649229873
  50. Michael Maurantonio, MDDenver, CO 802041932736675

Source: CMS NPPES, primary taxonomy 207P00000X: records by practice city and the list of records, file of Aug 9, 2026.

Colorado ranks 18 of 51 per resident

  1. Alaska25
  2. Wisconsin25
  3. New Mexico24
  4. Colorado24
  5. Delaware24
  6. Minnesota23
  7. 50 states and D.C.21

Source: CMS NPPES, primary taxonomy 207P00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

77.0% of these records appear in a Medicare file, against 81.5% 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. Colorado77.0%
  2. United States81.5%

Emergency Medicine Physician records in Colorado, measured

  • In a Medicare file1,104 of 1,434 · 77.0% here, 81.5% nationally
  • In the CMS Doctors and Clinicians file811 · 56.6% here, 58.7% nationally
  • Not updated in five years or more842 · 58.7% here, 54.8% nationally
  • Median graduation year2011 · the 810 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207P00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

1,434 NPPES records list emergency medicine physician (207P00000X) as their primary taxonomy with a practice address in Colorado: 24 per 100,000 residents against 21 nationally (50 states and D.C.). Denver has 287 of them (20%).

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. Washington1,459
  2. Missouri1,405
  3. Wisconsin1,464
  4. Arizona1,494

States with a similar rate per 100,000

  1. New Mexico24.5
  2. Alaska25.0
  3. New Hampshire25.0
  4. Delaware23.5

The largest states

  1. California7,751
  2. New York5,025
  3. Texas4,885
  4. Florida4,034
  5. Pennsylvania3,911

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.