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 23 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. Scott Lyle, M.D.Denver, CO 802621316154248
  2. Martha Lynch-Biasi, MDEvergreen, CO 804391699986877
  3. Irene Macharia, M.D.Denver, CO 802471881868859
  4. Jovan Mack, FNPDenver, CO 802241275990491
  5. Laura Macke, MDAurora, CO 800451346635562
  6. Thomas Mackenzie, MDDenver, CO 802041821007741
  7. Satish Madan, M.D.Denver, CO 802201235266289
  8. Taylor Maddox, M.D.Colorado Springs, CO 809091841650090
  9. Suhitha Madhavaram, M.D.Parker, CO 801341609230705
  10. Bronwen Magraw, M.D.Grand Junction, CO 815061851380323
  11. Indira Mahalingam, M.D.Broomfield, CO 800201164583324
  12. Nivedita Mahidhara, MDAurora, CO 800451124030432
  13. John Mahoney, M.D.Westminster, CO 802341730223512
  14. Donald Maier, MDGrand Junction, CO 815061922064229
  15. Erin Main, M.D.Highlands Ranch, CO 801291134575988
  16. Edward Malcolm, D.OLittleton, CO 801221629416862
  17. Pierre Malek, MDLittleton, CO 801271649360223
  18. Mahnoor Malik, M.D.Englewood, CO 801131922681808
  19. Daniel Malley, DOLone Tree, CO 801241659959567
  20. Samuel MaltbyAurora, CO 800451376293753
  21. Aruniti Manawa, DOPueblo, CO 810031962339200
  22. Anne Manchester, MDCastle Rock, CO 801091750532552
  23. Diana Mancini, MDBoulder, CO 803031619990090
  24. Saurabh Mangalik, M.D.Denver, CO 802201801971486
  25. Robert Manguso, M.D.Pueblo, CO 810031568405892
  26. Cory Manly, MDDenver, CO 802181922461136
  27. Adrienne Mann, MDDenver, CO 800451972892909
  28. Marsha Manning, M.D.Evergreen, CO 804391760489140
  29. William Manning, MDAurora, CO 800451720407240
  30. Doreen Marino, M.D.Aurora, CO 800121295934081
  31. Steven Mark, M.D.Golden, CO 804011184951519
  32. Lianne Marks, M.D., PH.D.Lakewood, CO 802261114918349
  33. Jack Markusfeld, M.D.Colorado Springs, CO 809201356320766
  34. Abdel Marques, MDParker, CO 801341649709890
  35. Karen MarsdenGreenwood Village, CO 801111720440316
  36. Emily MarshGlendale, CO 802461851493613
  37. Charles Marshall, MDDenver, CO 802181568573905
  38. Greer MarshallPueblo, CO 810031447188875
  39. August Martin, DOGreeley, CO 806311659953263
  40. Barry Martin, M.D.Aurora, CO 800451235279332
  41. Monique MartinEnglewood, CO 801101639187081
  42. Andrea Martinez-Savoren, RNAurora, CO 800141942337969
  43. Margherita Mascolo, MDDenver, CO 802041326194929
  44. Ann Mass, MDAspen, CO 816111598769358
  45. Robert Massa, MDBrighton, CO 806011427095421
  46. Samuel Mast, M.D.Fort Collins, CO 805281780970426
  47. Amy Mathew, MDAurora, CO 800451013409838
  48. Jacob Mathew, D.O.Fort Carson, CO 809131992068894
  49. Mark Matthews, MDDenver, CO 802051467589499
  50. Nancy MatthewsDenver, CO 802471376687160

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.