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 330 of 502.

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

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

The 8 largest groups in Denver

  1. Clinical Social Worker1,836
  2. Mental Health Counselor1,587
  3. Professional Counselor1,126
  4. Registered Nurse1,070
  5. Behavior Technician778
  6. Physical Therapist767
  7. Students in training730
  8. Speech-Language Pathologist716

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. Caitlyn O'GradyBehavior Technician1245848803
  2. Mary Beth O'Hagan, PHDClinical Psychologist1104494301
  3. Paige O'HaganMental Health Counselor1871076505
  4. Juliette O'Hara, BACase Manager/Care Coordinator1245076504
  5. Emily O'Keefe, PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1740762129
  6. Katie O'KeefeSpeech-Language Pathologist1194163204
  7. Mary O'Keefe, M.D.Anatomic Pathology & Clinical Pathology Physician1972828754
  8. Mara O'Keeffe, PT, DPTPhysical Therapist1831828706
  9. Raechel O'Kelley, MDInternal Medicine Physician1811988314
  10. Jillian O'LaughlinAssistant Behavior Analyst1598296501
  11. Megan O'Leary, DOStudent in an Organized Health Care Education/Training Program1861244865
  12. Sonja O'Leary, MDPediatrics Physician1235115841
  13. David O'Malley, DCChiropractor1588213342
  14. Don O'Malley, LCSW CACII SAP CEAPClinical Social Worker1992816979
  15. George O'Malley, M.A. CCC-SLPSpeech-Language Pathologist1235520586
  16. Kent O'MalleyPharmacist1043507460
  17. Melia O'Malley, RNPsychiatric/Mental Health Registered Nurse1174443527
  18. Anne O'Melia, MDChild & Adolescent Psychiatry Physician1619022738
  19. Cailyn O'Neil, SLP-CFSpeech-Language Pathologist1689356529
  20. Heather O'Neil, L.C.S.W.Clinical Social Worker1164664694
  21. Robert O'NeilNurse's Aide1568718898
  22. Deborah O'Neill, N.P.Nurse Practitioner1295872471
  23. Eugene O'Neill, MDFamily Medicine Physician1598733917
  24. Kyle O'Neill, LSWSocial Worker1275091811
  25. Niambh O'Neill, MDStudent in an Organized Health Care Education/Training Program1336908516
  26. Thomas O'NeillMental Health Counselor1801244371
  27. Helen O'Reilly-Moran, PH.D.Counseling Psychologist1205327483
  28. Alexandra O'RourkeStudent in an Organized Health Care Education/Training Program1306673090
  29. Kasey O'RourkeCounselor1437914082
  30. Esther O'Sullivan, NPAdult Psychiatric/Mental Health Registered Nurse1528085545
  31. Thomas O'Toole, MHPMental Health Counselor1548732209
  32. Hailey OakesBehavior Technician1053269662
  33. Michael OakesDiagnostic Radiology Physician1568663227
  34. Dina ObaidRegistered Nurse1184860033
  35. Ian ObeldobelStudent in an Organized Health Care Education/Training Program1184586075
  36. Madeline OberStudent in an Organized Health Care Education/Training Program1780291989
  37. Angela Oberg, RNUrology Physician1639213341
  38. Sean Oberlander, SASurgical Physician Assistant1891953808
  39. Raymond Obershaw, R.N.Registered Nurse1518253459
  40. Linda Oberst-Walsh, MDFamily Medicine Physician1952416935
  41. Busayo Obigbesan, MBRPsychiatric/Mental Health Nurse Practitioner1497116545
  42. Augustine Obinnah, M.D.Internal Medicine Physician1558412494
  43. Steven Oboler, M.D.Specialist1013164904
  44. Sylvia Oboler, MDGeriatric Medicine (Internal Medicine) Physician1598794208
  45. Gina Obrian, RDNRegistered Dietitian1417840018
  46. Hannah ObrienStudent in an Organized Health Care Education/Training Program1073315255
  47. James Obrien, M.D.Pulmonary Disease Physician1144244161
  48. Kevin Obrien, LCSWAddiction (Substance Use Disorder) Counselor1306962923
  49. Erin ObuchowskiMental Health Counselor1497443345
  50. Alexis Ocampo, MSClinical Exercise Physiologist1962097568

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.