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 2 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. Mary Jo Anleitner, P.T.Physical Therapist1245248137
  2. Sam Anouna, M.D.Gastroenterology Physician1639119365
  3. Susan Anschuetz, MA, LMFTMarriage & Family Therapist1891801841
  4. Georgann Apgar, DMDPeriodontics1710109087
  5. Richard Apke, M.D.Internal Medicine Physician1538148416
  6. Elicia ApodacaRegistered Nurse1457813164
  7. Winter ApodacaBehavior Technician1407581028
  8. Zoe AponteInterpreter1083421952
  9. Lydia Appling, LCSWClinical Social Worker1891223871
  10. Russell Apthorp, BACase Manager/Care Coordinator1831222330
  11. Laura AragonBehavior Technician1699506931
  12. Ashley AraujoCounselor1083311260
  13. Tanya ArchuletaRegistered Nurse1750914883
  14. Charleanea Arellano, PH.D.Clinical Psychologist1174551089
  15. Amanda Ariza, M.A., B.C.B.A.Behavior Analyst1164776654
  16. Timothy Ariza, BCBABehavior Analyst1780937516
  17. Joseph Armenta, M. ED.Mental Health Counselor1962814137
  18. Caitlin Arnold, MHS, CCC-SLPSpeech-Language Pathologist1629854252
  19. Rebecca Arnold, AUDAudiologist1093485328
  20. Diane Asher, NPNurse Practitioner1003286303
  21. Spencer AsibeluaMental Health Counselor1679021091
  22. Aliza Asocar, LCSWClinical Social Worker1225423486
  23. Roberta Assa, MACounselor1598810335
  24. Sandya Athigaman, DDSDentist1295347326
  25. Isabelle Audet, MDSurgery Physician1396732079
  26. Shawn Auer, COTAOccupational Therapy Assistant1811283815
  27. Elizabeth AustinMental Health Counselor1699054791
  28. Darryl Auston, MD PHDOrthopaedic Trauma Physician1962637983
  29. Ariana Avila GutierrezAssistant Behavior Analyst1245162114
  30. Melissa AzerEmergency Medicine Physician1780669770
  31. John Azevedo, RNRegistered Nurse1477049815
  32. Kristina Babe, R.N.Registered Nurse1538524590
  33. Jeffrey Baca, PHARMDPharmacist1164864211
  34. Emma Backlund, MA, CCC-SLPSpeech-Language Pathologist1942086103
  35. Kyle Bacon, PSYD, LP, BCBAPsychologist1922845270
  36. Amanda Badertscher, RDHDental Hygienist1942913371
  37. Robert Baerncopf, MAMental Health Counselor1922547686
  38. Frederick Bailey, LCSWClinical Social Worker1326622457
  39. Mileta BaileyMental Health Counselor1568823789
  40. Rewa Bailey, BA, CACIIAddiction (Substance Use Disorder) Counselor1215363494
  41. Garrett Baker, DOEmergency Medicine Physician1962997601
  42. James Baker, MDPsychiatry Physician1053453928
  43. Stephanie BakerClinical Social Worker1992137889
  44. Althea Bakke-Lysaker, PHDMarriage & Family Therapist1154949311
  45. Juan BalaguerPhysician Assistant1275388258
  46. Hailey BaldreyBehavior Technician1710714134
  47. Frank Baldwin, PACPhysician Assistant1376848804
  48. Merri BaldwinAddiction (Substance Use Disorder) Counselor1720428006
  49. Steven Ball, LMTMassage Therapist1578391017
  50. Grace BallardMental Health Counselor1699227934

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.