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 335 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. Diana Ortega MarquezRegistered Nurse1023423506
  2. Kristine Ortega-Riera, MSMental Health Counselor1225689110
  3. Heather Orth, MDEmergency Medicine Physician1003234535
  4. Alexandra OrtizMental Health Counselor1245786284
  5. Amanda OrtizObstetrics & Gynecology Physician1760008742
  6. Amanda OrtizSocial Worker1568228997
  7. Aurelia OrtizCounselor1124949730
  8. Dominique Ortiz, DPTPhysical Therapist1033893219
  9. Hannah Ortiz, MDStudent in an Organized Health Care Education/Training Program1356070510
  10. Javier Ortiz, R.N.Registered Nurse1679852941
  11. Lauren OrtizSocial Worker1053103275
  12. Louise Ortiz, MDFamily Medicine Physician1407961915
  13. Luciana Ortiz, M.S.Mental Health Counselor1518215623
  14. Nancy Ortiz Moreno, MA, LAC, ADVTP, ATPAddiction (Substance Use Disorder) Counselor1972921039
  15. Ana Ortiz-Mejias, LCSWClinical Social Worker1679441695
  16. Elyse OrtonOccupational Therapy Assistant1518433408
  17. Skylar Orton, DPTPhysical Therapist1952417974
  18. Sushmita OrugantiStudent in an Organized Health Care Education/Training Program1225602634
  19. Tania Orzynski, MDAnesthesiology Physician1801873955
  20. Steven Osa, M.D.Specialist1225090673
  21. Diane OsakiPediatric Occupational Therapist1265803647
  22. Sarah Osani, L.C.S.W.Clinical Social Worker1134147051
  23. Alexandrea OsbornClinical Social Worker1457285967
  24. Amanda Osborne, DPTPhysical Therapist1962811489
  25. Amy Osborne, M.D.Internal Medicine Physician1497013213
  26. Emily Osborne, PA-CPhysician Assistant1982123204
  27. Hillary Osborne, BAClinical Social Worker1083875264
  28. Luke Osborne, M.D.Anesthesiology Physician1568497873
  29. Taylor OselandStudent in an Organized Health Care Education/Training Program1508719592
  30. Madeline Osgood, LSWSocial Worker1588461552
  31. Tori Osgood, NPWomen's Health Nurse Practitioner1124075965
  32. Christina Oshier, M.A.Counselor1376777334
  33. Craig OsieczanekPharmacist1457794448
  34. Emma Osmanski, OTR/LOccupational Therapist1437543154
  35. Julia Osmond, RNRegistered Nurse1932626355
  36. Kensington Osmond, LAMFTMarriage & Family Therapist1972116788
  37. Alexandra Osorio, D.P.MFoot & Ankle Surgery Podiatrist1992554315
  38. Estefania Ospina-Alikhan, LCMFTMarriage & Family Therapist1962896126
  39. Carrie Oss, PAMedical Physician Assistant1568601474
  40. Michele Ossias, MTMassage Therapist1538529730
  41. Gay Ost, MSN, FNP-CFamily Nurse Practitioner1912012899
  42. David Oster, M.D.Orthopaedic Surgery Physician1972561207
  43. Lewis Oster, M.D.Orthopaedic Hand Surgery Physician1336189208
  44. Renatta Osterdock, M.D.Neurological Surgery Physician1982630588
  45. Abigail OsterlundSocial Worker1073313144
  46. Marcia Osteroos, LCSWClinical Social Worker1427161090
  47. Patricia Osthoff, PHYSICAL THERAPIST APhysical Therapy Assistant1114588746
  48. Erin Ostlie-Madden, PA-CPhysician Assistant1487275442
  49. Ryan Ostmann, PA-CPhysician Assistant1346996840
  50. Bennett Ostroff, PSY.D.Counselor1770905796

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.