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.
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
- Mary Jo Anleitner, P.T.Physical Therapist1245248137
- Sam Anouna, M.D.Gastroenterology Physician1639119365
- Susan Anschuetz, MA, LMFTMarriage & Family Therapist1891801841
- Georgann Apgar, DMDPeriodontics1710109087
- Richard Apke, M.D.Internal Medicine Physician1538148416
- Elicia ApodacaRegistered Nurse1457813164
- Winter ApodacaBehavior Technician1407581028
- Zoe AponteInterpreter1083421952
- Lydia Appling, LCSWClinical Social Worker1891223871
- Russell Apthorp, BACase Manager/Care Coordinator1831222330
- Laura AragonBehavior Technician1699506931
- Ashley AraujoCounselor1083311260
- Tanya ArchuletaRegistered Nurse1750914883
- Charleanea Arellano, PH.D.Clinical Psychologist1174551089
- Amanda Ariza, M.A., B.C.B.A.Behavior Analyst1164776654
- Timothy Ariza, BCBABehavior Analyst1780937516
- Joseph Armenta, M. ED.Mental Health Counselor1962814137
- Caitlin Arnold, MHS, CCC-SLPSpeech-Language Pathologist1629854252
- Rebecca Arnold, AUDAudiologist1093485328
- Diane Asher, NPNurse Practitioner1003286303
- Spencer AsibeluaMental Health Counselor1679021091
- Aliza Asocar, LCSWClinical Social Worker1225423486
- Roberta Assa, MACounselor1598810335
- Sandya Athigaman, DDSDentist1295347326
- Isabelle Audet, MDSurgery Physician1396732079
- Shawn Auer, COTAOccupational Therapy Assistant1811283815
- Elizabeth AustinMental Health Counselor1699054791
- Darryl Auston, MD PHDOrthopaedic Trauma Physician1962637983
- Ariana Avila GutierrezAssistant Behavior Analyst1245162114
- Melissa AzerEmergency Medicine Physician1780669770
- John Azevedo, RNRegistered Nurse1477049815
- Kristina Babe, R.N.Registered Nurse1538524590
- Jeffrey Baca, PHARMDPharmacist1164864211
- Emma Backlund, MA, CCC-SLPSpeech-Language Pathologist1942086103
- Kyle Bacon, PSYD, LP, BCBAPsychologist1922845270
- Amanda Badertscher, RDHDental Hygienist1942913371
- Robert Baerncopf, MAMental Health Counselor1922547686
- Frederick Bailey, LCSWClinical Social Worker1326622457
- Mileta BaileyMental Health Counselor1568823789
- Rewa Bailey, BA, CACIIAddiction (Substance Use Disorder) Counselor1215363494
- Garrett Baker, DOEmergency Medicine Physician1962997601
- James Baker, MDPsychiatry Physician1053453928
- Stephanie BakerClinical Social Worker1992137889
- Althea Bakke-Lysaker, PHDMarriage & Family Therapist1154949311
- Juan BalaguerPhysician Assistant1275388258
- Hailey BaldreyBehavior Technician1710714134
- Frank Baldwin, PACPhysician Assistant1376848804
- Merri BaldwinAddiction (Substance Use Disorder) Counselor1720428006
- Steven Ball, LMTMassage Therapist1578391017
- Grace BallardMental Health Counselor1699227934
The largest Colorado cities
- Denver25,068
- Colorado Springs19,771
- Aurora17,400
- Fort Collins6,928
- Boulder5,635
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.