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 277 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. Hayley Marcus, MDFamily Medicine Physician1528487774
  2. Sharon Marcus, CMTSpecialist1720341936
  3. Abby Marder, LSWSocial Worker1538786884
  4. Brad Marder, MDNephrology Physician1487636775
  5. Sean Mardis, DOPsychiatry Physician1417446246
  6. Mabel Mardones, M.D.Hematology & Oncology Physician1134446461
  7. Michael MareHospitalist Physician1508446626
  8. Lisa Mareb, LCSWClinical Social Worker1033473525
  9. Kristin MarescaDoula1649754532
  10. Ravi Marfatia, MDCardiovascular Disease Physician1811196405
  11. Devan MarfilCase Manager/Care Coordinator1437607520
  12. Shawna Margesson, PH.D.Addiction (Substance Use Disorder) Counselor1013328269
  13. Claire Margolf, MS RDRegistered Dietitian1821970435
  14. Arthur Margolis, DDSOrthodontics and Dentofacial Orthopedics Dentistry1861611055
  15. Melissa Maria-DiazBehavior Technician1972421097
  16. Thessa Mariano, LCSWClinical Social Worker1659049872
  17. Sasha MarinSocial Worker1588438063
  18. Maria Marin RuizStudent in an Organized Health Care Education/Training Program1023961703
  19. Jen Marine, LCSWClinical Social Worker1124996673
  20. Annie Mariner, PTAPediatric Rehabilitation Medicine Physician1053981829
  21. Elizabeth MarinoRegistered Nurse1902390891
  22. Julie Marino, M.S.,CSAT,CSPT,CBCPCounselor1447532049
  23. Melissa MarionNurse's Aide1396902649
  24. Michael Maris, MDHematology & Oncology Physician1053395624
  25. Dana MarjomakiCertified Registered Nurse Anesthetist1659303048
  26. Alexandra Mark, MSWSocial Worker1750924882
  27. Carolyn Marker, LMTMassage Therapist1851140495
  28. Sara Markey, M.D.Psychiatry Physician1477630473
  29. Sean Markey, M.D.Neurological Surgery Physician1235165705
  30. Sophia MarkeyMental Health Counselor1457143224
  31. Troy Markgraf, DDSDentist1811626203
  32. Rebekah Markheim, PSY,D,Clinical Psychologist1467681734
  33. Emily Markley, PSYDClinical Psychologist1871916940
  34. Payton Markley, MDStudent in an Organized Health Care Education/Training Program1770385171
  35. Howard Markman, PH.DFamily Psychologist1487363461
  36. Vincent Markovchick, MDEmergency Medicine Physician1144239088
  37. Emily Markovich, LPCProfessional Counselor1538771977
  38. Stephanie MarkovichCase Manager/Care Coordinator1831501451
  39. Matthew Markowski, MDPediatrics Physician1083795876
  40. Angurie Marks, LPCProfessional Counselor1770104499
  41. Daniel Marks, D.O.Obstetrics & Gynecology Physician1871906420
  42. Erich Marks, M.D.Anesthesiology Physician1891995270
  43. Jay Markson, MDPediatrics Physician1144289984
  44. Clayton Markwell, ACD.0002396Mental Health Counselor1518622034
  45. Linda Marler, L.AC.Acupuncturist1497979991
  46. Madeline Marler, PSYDPsychologist1487208948
  47. Madeline MarlowAcute Care Nurse Practitioner1417613803
  48. Shayna Marmon, CF-SLPSpeech-Language Pathologist1376910745
  49. Tarah Marne, BACase Manager/Care Coordinator1396877353
  50. Asa Marokus, M.D.Psychiatry Physician1659576569

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.