NPPES file of Aug 9, 2026

Doctors and health care providers in O Fallon, MO

1,225 individual NPPES records list a practice address in O Fallon, 16th of 317 Missouri cities. The largest group is physical therapist: 131, 11% of the city's records, against 4% across Missouri. Page 21 of 25.

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

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

The 8 largest groups in O Fallon

  1. Physical Therapist131
  2. Speech-Language Pathologist119
  3. Pharmacist84
  4. Professional Counselor81
  5. Chiropractor74
  6. Family Nurse Practitioner44
  7. Clinical Social Worker40
  8. Family Medicine Physician37

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

O Fallon in Missouri

  • Rank in Missouri16th of 317 cities by records
  • Share of the state1.1% of Missouri's records
  • Specialties present25 or more taxonomy codes
  • Top three groups27.3% of all records
  • Physical Therapist rank3rd of the 10 Missouri cities with the most

Compared with Missouri as a whole, O Fallon has 6.3× the state's share of orthodontics and dentofacial orthopedics dentistry records and 0.59× its share of internal medicine physician records.

Providers in O Fallon, alphabetically

  1. Dwain Sliger, LPC, CRAADCMental Health Counselor1851632632
  2. Brandie Smalley, PMHNP-BC, PHDPsychiatric/Mental Health Nurse Practitioner1285913129
  3. Nikol Smart, MDObstetrics & Gynecology Physician1417211756
  4. Abbey Smith, D.M.D.Dentist1326592445
  5. Aimee Smith, PTPhysical Therapist1780242354
  6. Janice Smith, MA, BCBASpecialist1649576646
  7. Kelli Smith, DMDGeneral Practice Dentistry1497323117
  8. Lillie SmithPharmacist1881940856
  9. Logan Smith, DDSGeneral Practice Dentistry1831878214
  10. Rachel Smith, APRNNurse Practitioner1538690334
  11. Rebecca Smith, PA-CPhysician Assistant1013030949
  12. Teresa Smith, NPNurse Practitioner1225030117
  13. Julie SniderBehavior Analyst1033415005
  14. Shelly Solem, P.T.Physical Therapist1841300373
  15. Dylan Solomon, PHARMDPharmacist1326806639
  16. Jennifer Soprych, DMDGeneral Practice Dentistry1033696935
  17. Joann Spann, ATCAthletic Trainer1891806519
  18. Travis Sparks, DPTPhysical Therapist1871015206
  19. Faith SpearsHome Health Aide1083420442
  20. Dawn Spell, FNP-CNurse Practitioner1427452762
  21. Teri Spencer, MS/CCC-SLPSpeech-Language Pathologist1568771939
  22. Angela Spray, M.D.Dermatology Physician1477599884
  23. Heather St. Peter, LCSWClinical Social Worker1306378765
  24. Sarah Staats, COTA/LOccupational Therapy Assistant1013648948
  25. George Stachecki, M.D.Family Medicine Physician1902916927
  26. Melody Staiger, PHARMDPharmacist1952063919
  27. Liza StantonFamily Medicine Physician1508976523
  28. Maxwell StapletonRegistered Dietitian1750126272
  29. Aaron Steimel, DOInternal Medicine Physician1659067874
  30. Betsey Steimel, APRN FNPNurse Practitioner1376196162
  31. Jennifer Steinlage, DPTPhysical Therapist1144462128
  32. Lena SteinsStudent in an Organized Health Care Education/Training Program1407716756
  33. Katrina StephensRegistered Nurse First Assistant1114855590
  34. Alan Steube, DOInternal Medicine Physician1740857457
  35. Erica Stevens, CRNACertified Registered Nurse Anesthetist1811236433
  36. Samantha Stevens, FNPNurse Practitioner1700597002
  37. Brianne StevichMassage Therapist1740162585
  38. Julie Stewart, DPMFoot & Ankle Surgery Podiatrist1124165428
  39. Victoria Stewart, ODOptometrist1871087817
  40. Amanda Stilwell, FNP, RNNurse Practitioner1669196010
  41. Todd Stojeba, D.C.Chiropractor1457482259
  42. Michelle Stolin, MPTPhysical Therapist1477749562
  43. Julie Storer, ODOptometrist1881863546
  44. Constance Stranquist, FNPNurse Practitioner1770509093
  45. Holly Strassner, R.N.PNurse Practitioner1528209319
  46. Victoria Strege, M.S. CF-SLPSpeech-Language Pathologist1124850201
  47. Regina StruemphPhysical Therapy Assistant1568163079
  48. Rodney Stuckenschneider, RPHPharmacist1679858906
  49. Kimberly Stuckey, LPCProfessional Counselor1225304256
  50. Mark Stuckey, D.C.Chiropractor1386692234

The largest Missouri cities

  1. Saint Louis27,605
  2. Kansas City13,759
  3. Springfield6,403
  4. Columbia6,004
  5. Joplin2,443

All of Missouri →

How to read this directory

O Fallon, Missouri appears in the CMS National Plan and Provider Enumeration System with 1,225 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 O Fallon - 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 O Fallon 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 O Fallon is weighted toward Physical Therapist (131 clinicians, followed by Speech-Language Pathologist with 119 and Pharmacist with 84). 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 Missouri's population, O Fallon reports roughly 19.8 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 Missouri's most common specialties, Behavior Technician is the most prominent one with no provider currently listing a O Fallon practice address, a coverage gap O Fallon patients typically fill by traveling to a larger nearby hub.

For O Fallon 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 O Fallon, MO?

There are 1,225 registered healthcare providers in O Fallon, MO, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in O Fallon?

The most common specialties in O Fallon are Physical Therapist, Speech-Language Pathologist, Pharmacist, Professional Counselor, Chiropractor. Physical Therapist has the most providers with 131.

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.