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 24 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
- Camela LittlepagePhysical Therapy Assistant1255978052
- Kayla LittonOccupational Therapy Assistant1881085116
- Helene Liversedge, MS, PTPediatric Physical Therapist1245016294
- Karen Lochhead, MDNephrology Physician1275524761
- Tara LofgrenMassage Therapist1841795838
- Joanne Lofthouse, NPGerontology Nurse Practitioner1891903902
- David Lohmuller, DCChiropractor1871181784
- Christine Loin, CCC SLPSpeech-Language Pathologist1073228680
- Anna LongAddiction (Substance Use Disorder) Counselor1316686405
- Cindy Long, M.D.Obstetrics & Gynecology Physician1407945405
- Maia Longenecker, LCSWClinical Social Worker1497180129
- Samantha LoonMental Health Counselor1518449412
- Emily Lopez, RNRegistered Nurse1386527042
- Robert Lopez, MAT, LAT, ATCAthletic Trainer1699126466
- Tracy LounsberryCounselor1427553825
- Kathryn Lovett, PAPhysician Assistant1619600954
- Alys Low, LCSWClinical Social Worker1568740645
- Ashley LowensteinRegistered Nurse1164353074
- Pamela Lucerne, CACIIIAddiction (Substance Use Disorder) Counselor1487998043
- Kimberly Lucero, MS, RDRegistered Dietitian1215898705
- Maricarmen LucioDental Assistant1730842857
- Diana LuckmanMental Health Counselor1700134244
- Lauren Lujan, CLELactation Consultant (Non-RN)1710869748
- Schyenne Ly, PHARMDPharmacist1306514732
- Julie Lyons, MA, LPCMental Health Counselor1851799175
- Sean Ma, ODOptometrist1568183440
- Matthew Macarus, M.ED.Counseling Psychologist1396558508
- David MacaulayAddiction (Substance Use Disorder) Counselor1740795749
- Christopher MaceyAddiction (Substance Use Disorder) Counselor1033642012
- Anastacia Macias, RNRegistered Nurse1548690720
- Lisa MackSpecialist1154855872
- Julie Mackie, CD(DONA)Doula1942553102
- Timothy Mackie, PASurgical Physician Assistant1689655466
- Caroline Maclay, MACounseling Psychologist1932536133
- Thomas MacnabbBehavior Technician1235912627
- Danielle Madonia, B.A.Counselor1639600273
- Kirsten Madrid, MS, CCC-SLPSpeech-Language Pathologist1174719603
- Jenna Madsen, D.O.Obstetrics & Gynecology Physician1063851343
- Mara MaeglinSocial Worker1841719721
- Christina MagallanesCounselor1457853574
- Megan Magee, DTRRegistered Dietetic Technician1336673870
- Yataka Magee, CMTMassage Therapist1447249271
- Maryann Magley-Herman, LPC, LAC, MACCounseling Psychologist1821635202
- Sheela Mahnke, M.D.Pediatrics Physician1811969264
- Michael MahoneyMental Health Counselor1255689790
- Vita Malama, CD(DONA)Doula1720686363
- Meghan Malecki, RNRegistered Nurse1265748156
- Brett Malin, RNAmbulatory Care Registered Nurse1114865391
- Elizabeth Mallon, CPNP-PCPediatric Nurse Practitioner1306717699
- Lorraine Malonson, PAPhysician Assistant1720208036
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.