NPPES file of Aug 9, 2026

Doctors and health care providers in Denver, CO

25,068 individual NPPES records list a practice address in Denver, 1st of 193 Colorado cities. The largest group is clinical social worker: 1,836, 7% of the city's records, against 5% across Colorado. Page 329 of 502.

CMS NPPES registry, file of Aug 9, 2026 · method · Verify with CMS →

The 8 largest groups in Denver

Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.

Denver in Colorado

  • Rank in Colorado1st of 193 cities by records
  • Share of the state16.8% of Colorado's records
  • Specialties present25 or more taxonomy codes
  • Top three groups18.1% of all records
  • Clinical Social Worker rank1st of the 10 Colorado cities with the most

Compared with Colorado as a whole, Denver has 1.8× the state's share of psychiatry physician records and 0.39× its share of behavior technician records.

Providers in Denver, alphabetically

  1. Kelly Nykamp, CCC-SLPSpeech-Language Pathologist1437648250
  2. Niina Nykanen, FNPFamily Nurse Practitioner1104479302
  3. Jessica Nylen, B.A.Case Manager/Care Coordinator1124162425
  4. Kathleen Nylin, RNInternal Medicine Physician1457488330
  5. Blair Nyline, MACounseling Psychologist1356752240
  6. Dana Nzirubusa, RNRegistered Nurse1447301460
  7. Elberta O'Brian, RNRegistered Nurse1093842056
  8. Aubrey O'Brien, MSWCase Manager/Care Coordinator1528289402
  9. Colleen O'BrienGeneral Practice Physician1689891996
  10. Dina O'Brien, DDSGeneral Practice Dentistry1336844182
  11. Erin O'Brien, DPTPhysical Therapist1659032266
  12. Joseph O'Brien, MD, MPHStudent in an Organized Health Care Education/Training Program1659173359
  13. Kate O'Brien, LCSWSocial Worker1356779979
  14. Katie O'BrienStudent in an Organized Health Care Education/Training Program1689336463
  15. Kelly O'Brien, MDInternal Medicine Physician1841300407
  16. Megan O'BrienMarriage & Family Therapist1871137588
  17. Michael O'Brien, D.C.Chiropractor1982940235
  18. Michael O'Brien, CASE MANAGERCase Manager/Care Coordinator1447639612
  19. Neal O'Brien, DPTPhysical Therapist1881579415
  20. Robin O'BrienPeer Specialist1063805141
  21. Michael O'Callaghan, MDAnesthesiology Physician1033256318
  22. Christopher O'Connell, MSWSocial Worker1972268001
  23. Kelley O'Connell, PA-CPhysician Assistant1942845003
  24. Adriana O'Connor, R.D.H.Dental Hygienist1497133730
  25. Brett O'ConnorNurse's Aide1861035420
  26. Caitlin O'Connor, NDNaturopath1255581096
  27. Cheryl O'Connor, LPN/IV2Licensed Practical Nurse1760656953
  28. Dana O'Connor, DNP, CNMMidwife1457898918
  29. Ethan O'Connor, BAOther Specialist/Technologist1871358960
  30. James O'ConnorBehavior Technician1306327713
  31. Katie O'ConnorSchool Psychologist1518798172
  32. Kendra O'Connor, BCBABehavior Analyst1790432359
  33. Kevin O'Connor, M.AMental Health Counselor1205206703
  34. Macauley O'Connor, PT, DPTPhysical Therapist1255933529
  35. Madison O'Connor, LCSWClinical Social Worker1467134924
  36. Mary O'Connor, MDPediatrics Physician1457466948
  37. Micaela O'ConnorChiropractor1114315942
  38. Shane O'Connor, PHAPharmacist1134779879
  39. Sean O'DanielCase Manager/Care Coordinator1912369026
  40. Kelly O'DeaStudent in an Organized Health Care Education/Training Program1760936892
  41. Katherine O'DohertyStudent in an Organized Health Care Education/Training Program1902628886
  42. Daniel O'Donnell, PHD, LMHC, LPCCCounseling Psychologist1326358201
  43. Erin O'Donnell, LPCProfessional Counselor1982107272
  44. Morgan O'DonnellBehavior Analyst1437997350
  45. Patricia O'Donnell, ATR-BC, LPCArt Therapist1558493809
  46. Richard O'Donnell, M.D.,D.D.S.Specialist1144355967
  47. Ryan O'Donnell, RBTBehavior Technician1255202677
  48. Lindsey O'DonovanStudent in an Organized Health Care Education/Training Program1831597277
  49. Chaelene O'Driscoll, IBCLCLactation Consultant (Non-RN)1255101689
  50. James O'GearyCounselor1588142079

The largest Colorado cities

  1. Colorado Springs19,771
  2. Aurora17,400
  3. Fort Collins6,928
  4. Boulder5,635
  5. Lakewood4,944

All of Colorado →

How to read this directory

Denver, Colorado appears in the CMS National Plan and Provider Enumeration System with 25,068 registered healthcare providers spanning 25 or more distinct NUCC-taxonomy specialties. This count includes every individual clinician who has applied for an NPI and listed a practice address in Denver - physicians, dentists, nurse practitioners, physician assistants, chiropractors, physical therapists, optometrists, psychologists, podiatrists, and every other credentialed provider type CMS tracks. It does not measure hospital beds, urgent-care capacity, or whether a given clinic is accepting new patients; it measures the pool of professionals with current NPI enrollment and a Denver practice location on file. Every figure is drawn from the federal National Provider Identifier Registry (CMS NPPES) - more than 7 million providers, maintained since May 2007, with 2024 Medicare Part D data, and, according to CMS, can be searched, compared, and traced in our methodology.

The provider mix in Denver is weighted toward Clinical Social Worker (1,836 clinicians, followed by Mental Health Counselor with 1,587 and Professional Counselor with 1,126). That distribution reflects how NPPES records specialty: providers self-select a primary taxonomy code, so a family physician who also practices geriatrics will show up under whichever NUCC code they registered first. Relative to Colorado's population, Denver reports roughly 426.5 providers per 100,000 residents using the state-level denominator, which is a rough proxy rather than a precise access-to-care measurement; the true catchment area of any {cityName} clinician extends beyond the municipal boundary.

For Denver patients, this directory is most useful as a starting shortlist. Important: PlainDoctor is a directory of publicly available CMS government data, not a review site, a ranking, or medical advice. NPPES data is self-reported and refreshed monthly; call the practice directly to confirm the provider is still there, accepts your insurance, and is taking new patients.

For informational purposes only; this directory is not medical advice and not a substitute for checking a license. See also: how to find a doctor and how to verify one.

Common questions

How many doctors are in Denver, CO?

There are 25,068 registered healthcare providers in Denver, CO, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Denver?

The most common specialties in Denver are Clinical Social Worker, Mental Health Counselor, Professional Counselor, Registered Nurse, Behavior Technician. Clinical Social Worker has the most providers with 1,836.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov). Records are self-reported registrations, not licenses.

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.