NPPES file of Aug 9, 2026

Doctors and health care providers in Thornton, CO

2,234 individual NPPES records list a practice address in Thornton, 17th of 193 Colorado cities. The largest group is mental health counselor: 244, 11% of the city's records, against 6% across Colorado. Page 30 of 45.

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

The 8 largest groups in Thornton

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

Thornton in Colorado

  • Rank in Colorado17th of 193 cities by records
  • Share of the state1.5% of Colorado's records
  • Specialties present25 or more taxonomy codes
  • Top three groups24.4% of all records
  • Mental Health Counselor rank10th of the 10 Colorado cities with the most

Compared with Colorado as a whole, Thornton has 4.7× the state's share of interpreter records and 0.22× its share of behavior technician records.

Providers in Thornton, alphabetically

  1. Rosemary O'DonnellOccupational Therapist1831975580
  2. Barbara O'DwyerMental Health Counselor1922987726
  3. Jessica O'Dwyer, RDRegistered Dietitian1861289183
  4. Charles O'Neill, BAMental Health Counselor1467584474
  5. Carol Oakleaf, PAPhysician Assistant1124340583
  6. Reegan Ochoa, EMTEmergency Medical Services (Emergency Medicine) Physician1235084781
  7. Steve OchoaMental Health Counselor1487907655
  8. Genevieve Ochs, MDFamily Medicine Physician1457763237
  9. Danya OdomProfessional Counselor1275028045
  10. Christian Oggel, PAPhysician Assistant1730635418
  11. John Oh, LPCCMental Health Counselor1043078363
  12. Karla OjedaMental Health Counselor1063531549
  13. Carlos Ojeda Cedeno, M.A.Counselor1457759862
  14. Laurel Okasaki, MSW, LCSWClinical Social Worker1588053847
  15. Morry Olenick, MDPlastic Surgery Physician1265596308
  16. Jonathan Olivier, DDSGeneral Practice Dentistry1124248653
  17. Courtney OlmscheidSpeech-Language Pathologist1114703378
  18. Sydney OlmstedSpeech-Language Pathologist1649193764
  19. Nancy Olsen, LPCProfessional Counselor1962560573
  20. Nicholas Olsen, D.O.Physical Medicine & Rehabilitation Physician1063472785
  21. Dennis Olson, M.D.Specialist1841397254
  22. Liana OlveraMassage Therapist1982200929
  23. Joseph Oria, MSW, LCSW, LACClinical Social Worker1467855718
  24. Adam Orin, MA, LPCMental Health Counselor1952898900
  25. Shawna OrozcoCounselor1366817009
  26. Shannon Ortiz, PHARMDPharmacist1932531399
  27. Sara Ortiz Becerra, LICSWClinical Social Worker1346479417
  28. Linda Osterlund, PH.D., LMFTMarriage & Family Therapist1427820141
  29. Ryan Otten, M.D.Occupational Medicine Physician1649463407
  30. Justin OttesonAddiction (Substance Use Disorder) Counselor1538674502
  31. Christina Ottomeyer, DOOrthopaedic Surgery Physician1073931705
  32. Breeann OverbergDoula1053140947
  33. Elizabeth Overturf, OTR/LOccupational Therapist1114754637
  34. Cathleen OwensProfessional Counselor1336371632
  35. Rachle OxfordCounselor1962947903
  36. Nicole PaavolaMental Health Counselor1265898654
  37. Cyndia Pace, MA, LPCMental Health Counselor1326388216
  38. Katherine PaceMental Health Counselor1689227647
  39. Breeanna PachecoPharmacist1134840804
  40. Jose Pacheco, M.D.Cardiovascular Disease Physician1417945759
  41. Kimberley PachecoBehavior Technician1356001572
  42. Malinda Paddock, LCSWAddiction (Substance Use Disorder) Counselor1831531284
  43. Ashley PadillaCounselor1942730338
  44. Paul Padilla, CASAddiction (Substance Use Disorder) Counselor1801561030
  45. Duncan Page, LPCProfessional Counselor1427363050
  46. Martina Paiz, NPCommunity Health Nurse Practitioner1225227234
  47. Kristy Palacios, LPCCounselor1073967485
  48. Jennifer Palazzolo, RPHPharmacist1326322124
  49. Elizabeth PalizziParamedic1134080385
  50. Emilio PalleteMental Health Counselor1508135237

The largest Colorado cities

  1. Denver25,068
  2. Colorado Springs19,771
  3. Aurora17,400
  4. Fort Collins6,928
  5. Boulder5,635

All of Colorado →

How to read this directory

Thornton, Colorado appears in the CMS National Plan and Provider Enumeration System with 2,234 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 Thornton - 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 Thornton 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 Thornton is weighted toward Mental Health Counselor (244 clinicians, followed by Counselor with 162 and Clinical Social Worker with 139). 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, Thornton reports roughly 38 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.

Of Colorado's most common specialties, Student in an Organized Health Care Education/Training Program is the most prominent one with no provider currently listing a Thornton practice address, a coverage gap Thornton patients typically fill by traveling to a larger nearby hub.

For Thornton 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 Thornton, CO?

There are 2,234 registered healthcare providers in Thornton, CO, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Thornton?

The most common specialties in Thornton are Mental Health Counselor, Counselor, Clinical Social Worker, Professional Counselor, Speech-Language Pathologist. Mental Health Counselor has the most providers with 244.

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.