NPPES file of Aug 9, 2026

Internal Medicine Physician in Colorado

2,046 NPPES records list internal medicine physician with a practice address in Colorado, 35 per 100,000 residents, the 35th highest rate of 51. Denver and Aurora have the most; each record links to the provider's NPI and the Colorado license search. Page 24 of 41.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207R00000X · 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, 493

  1. Denver493
  2. Aurora244
  3. Colorado Springs169
  4. Pueblo91
  5. Boulder74

Internal Medicine Physician records in Colorado

  1. Susan Matthews, M.D.Colorado Springs, CO 809201194705244
  2. Heidi Matus, MDDenver, CO 802091063674851
  3. Linda Mawhorter, M.D.Alamosa, CO 811011275517815
  4. Thomas Mayeda, MDLakewood, CO 802351609873306
  5. Natalie Mayer, D.O.Wheat Ridge, CO 800331609167709
  6. Stephen Mazurkivich, MDUsaf Academy, CO 808401144781360
  7. Cristen Mazzella, MDDenver, CO 802471790715332
  8. Danilo Mazzella, MDAurora, CO 800121265463756
  9. Daniel McAninch, MDWestminster, CO 802341962539940
  10. Gregory McAuliffe, MDAlamosa, CO 811011427048198
  11. Jennifer McBride, MDDenver, CO 802301982642997
  12. Connor McBryde, M.D.Denver, CO 802201760459275
  13. Kathryn McCaffrey, M.D.Pueblo, CO 810031538484696
  14. Douglas McCallum, M.D.Denver, CO 802461801893110
  15. Shauna McCarthyLakewood, CO 802261225165202
  16. David McCarty, DOLongmont, CO 805011174521058
  17. Emma McCarty, MDBoulder, CO 803041275537078
  18. Mark McCaulley, MDSteamboat Spgs, CO 804871801855960
  19. Thomas McCloskey, M.D.Aurora, CO 800141780711705
  20. Robert McClure, M.D.Lafayette, CO 800261609927367
  21. Darcy McConeghyCentennial, CO 801221023145083
  22. Richard McConnaughy, MDGolden, CO 804031871562850
  23. Mary McCord, MDAurora, CO 800451316147036
  24. Patrick McCormick, M.D.Aurora, CO 800451073878344
  25. Bruce McFarland, D.O.Arvada, CO 800041770584120
  26. Timothy McGinnis, MDAurora, CO 800451366191967
  27. Rebecca McGourty, M.D.Brighton, CO 806011922425172
  28. Michael McGuinn, M.D.Pueblo, CO 810031225064223
  29. James McGuire, MDLafayette, CO 800261811085723
  30. Thomas McGuire, D.O.Longmont, CO 805041932410271
  31. Thomas McGuire, MDCanon City, CO 812121356351969
  32. Joshua McKeeLakewood, CO 802281760131189
  33. Anne McLean, M.D.Evergreen, CO 804391447257753
  34. Bryant McNeill, M.D.Usaf Academy, CO 808401801092390
  35. James McReynolds, MDLoveland, CO 805381184844169
  36. Cody McWhirter, MDLone Tree, CO 801241225616071
  37. Caroline Mears Norris, DOAspen, CO 816111164981270
  38. Kate Measom, M.D.Denver, CO 802041639610876
  39. Sai Medi, M.D.Lakewood, CO 802281164771655
  40. Philip Mehler, MDDenver, CO 802041508817859
  41. Suzanne Mela, M.D.Denver, CO 802461952507667
  42. Diane Melancon, MDGrand Junction, CO 815051205836426
  43. Larry Melia, M.D.Delta, CO 814161992806160
  44. Judith Melick, R.N.Englewood, CO 801131396875167
  45. Kyle Mellinger, MDEnglewood, CO 801131497335178
  46. David Mellman, M.D.Denver, CO 802201972688554
  47. Meara Melton, M.D., M.B.A.Greeley, CO 806341619409083
  48. Paul Menard.katcher, MDAurora, CO 800451104980291
  49. Katherine MendenhallLittleton, CO 801271336283969
  50. Ben Mendoza, M.D.Northglenn, CO 802341285955534

Source: CMS NPPES, primary taxonomy 207R00000X: records by practice city and the list of records, file of Aug 9, 2026.

Colorado ranks 35 of 51 per resident

  1. Georgia35
  2. Wisconsin35
  3. South Carolina35
  4. Colorado35
  5. Kansas34
  6. Kentucky34
  7. 50 states and D.C.44

Source: CMS NPPES, primary taxonomy 207R00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

70.8% of these records appear in a Medicare file, against 78.7% 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. Colorado70.8%
  2. United States78.7%

Internal Medicine Physician records in Colorado, measured

  • In a Medicare file1,448 of 2,046 · 70.8% here, 78.7% nationally
  • In the CMS Doctors and Clinicians file1,091 · 53.3% here, 61.4% nationally
  • Not updated in five years or more1,240 · 60.6% here, 55.4% nationally
  • Median graduation year2006 · the 1,090 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207R00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

2,046 NPPES records list internal medicine physician (207R00000X) as their primary taxonomy with a practice address in Colorado: 35 per 100,000 residents against 44 nationally (50 states and D.C.). Denver has 493 of them (24%).

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. Wisconsin2,078
  2. Indiana2,109
  3. Oregon2,116
  4. South Carolina1,881

States with a similar rate per 100,000

  1. Kansas34.3
  2. Georgia35.5
  3. Puerto Rico35.7
  4. Kentucky33.7

The largest states

  1. California17,696
  2. New York12,067
  3. Florida10,151
  4. Texas9,175
  5. Pennsylvania7,300

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.