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 17 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. Robert Olson, DDS MSOrthodontics and Dentofacial Orthopedics Dentistry1891869988
  2. Debra OmaraOccupational Therapist1811027733
  3. Allyse Ortega, FNP-C, AGACNP, RNFamily Nurse Practitioner1982149878
  4. Jenna Osseck, O.D.Optometrist1700268281
  5. Alison Oswald, MDPediatrics Physician1780611160
  6. Macie Oswald, RD, RDNRegistered Dietitian1750107280
  7. Raymond Ottomeyer, D.C.Chiropractor1134235799
  8. Casey Overton, R.N., D.C.Chiropractor1184862286
  9. Danielle Overton, M.S., CCC-SLPSpeech-Language Pathologist1932881950
  10. Theresa Owens, COTAOccupational Therapy Assistant1265797955
  11. Elizabeth PachecoSpeech-Language Pathologist1093101115
  12. Richard Pagano, PTPhysical Therapist1023328622
  13. Jessie PageCritical Care Medicine Registered Nurse1366369894
  14. Jennifer Panasci, MDPediatrics Physician1659325777
  15. Joan Papin, SLP, CCCSpeech-Language Pathologist1689027138
  16. Erica Parker, ADMINISTRATERHome Health Aide1265374623
  17. Bradley Parks, PHARMDPharmacist1013639921
  18. Sarah Parson, M.S CCC-SLPSpeech-Language Pathologist1144629387
  19. Linda Partridge, PH.D.Professional Counselor1992919872
  20. John Pastorek, DMDGeneral Practice Dentistry1801155874
  21. Sarah PatriarcaPhysical Therapy Assistant1912641903
  22. Kathleen Patrick, MA,LPCProfessional Counselor1184066854
  23. Michael PattersonPharmacist1710555347
  24. Ronald Patterson, CRNFA, CNORRegistered Nurse First Assistant1114445020
  25. Billi Patzius, PHDProfessional Counselor1710634795
  26. Andrew PawloskiStudent in an Organized Health Care Education/Training Program1902766926
  27. Maggie Pawlowski, PT, DPTPhysical Therapist1609611698
  28. Lori PaynePediatric Nurse Practitioner1336545391
  29. Richi Peer, CCC-SLPSpeech-Language Pathologist1275688673
  30. Lara Penn, FNPNurse Practitioner1538406954
  31. Enmanuel Perez, MDNeurology Physician1467947945
  32. Julia Perine, M.A., CCC-SLPSpeech-Language Pathologist1528511896
  33. William Peroutka, M.P.T., A.T.C.Physical Therapist1467565929
  34. Lindsey PerreyPharmacist1740880178
  35. Christopher Perry, PAPhysician Assistant1609284645
  36. Angela Peter, NPFamily Nurse Practitioner1205898533
  37. Dawn PetersPharmacist1780968834
  38. Mary Peters, OTA/LOccupational Therapy Assistant1306547591
  39. Jennifer Phillips, APRN-CNurse Practitioner1700301272
  40. Alyssa PhinneyDentist1093236937
  41. Nika Pickett, RPHPharmacist1396026332
  42. Lauren Pickrell, OTR/LOccupational Therapist1922773928
  43. Silpa Pidaparthi, PTPhysical Therapist1104155670
  44. Colleen PilcherBehavior Analyst1073062691
  45. Peter PinkertonOccupational Therapy Assistant1801262365
  46. Grace PipkinsBehavior Technician1669053278
  47. Nathan Place, A.T.,C.Rehabilitation Practitioner1558348789
  48. John Platt, MA MSWCounselor1376706770
  49. Jennifer Plessner, D.D.S.General Practice Dentistry1992826754
  50. Gwenda Plummer, LPCProfessional Counselor1790004067

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.