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 9 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. Samantha GorhamMental Health Counselor1285477588
  2. Ranjita GosainOccupational Therapist1376437806
  3. Natalie Gough, LCSWClinical Social Worker1265769020
  4. Bradly Gould, DCChiropractor1659761716
  5. Sara Gozdecki, FNP-CFamily Nurse Practitioner1255218095
  6. John Graham, MA, MSEDProfessional Counselor1699894766
  7. Tina Graham, PLPCMental Health Counselor1740940840
  8. David Grant, LCSWClinical Social Worker1639622152
  9. Rebecca Graue, PT, DPTPhysical Therapist1275932386
  10. Amy Grawey, M.D.Family Medicine Physician1083824684
  11. Gary Gray, MDInternal Medicine Physician1497729826
  12. Alexandra GrbcichRegistered Dietitian1295430635
  13. Lisa GreerAttendant Care Provider1770124802
  14. Diane Gregory, COTA/LOccupational Therapy Assistant1013391341
  15. Ronald GregoryPersonal Care Attendant1225921976
  16. Christine Grierson, M.A., CCC-SLPSpeech-Language Pathologist1851696694
  17. Chad Griffin, PLPCProfessional Counselor1730842881
  18. Andria Griffith, MA PLPCMental Health Counselor1336704055
  19. Melinda GroenkeSpeech-Language Pathologist1215123799
  20. Scott Grogan, D.C.Chiropractor1285904631
  21. Mark Gronski, LPCClinical Social Worker1841565363
  22. Amy GroschSpeech-Language Pathologist1023534310
  23. Richard GroschPharmacist1720427990
  24. Danielle Grunloh-Gumpenberger, MDObstetrics & Gynecology Physician1285164053
  25. Brian Grus, MDInternal Medicine Physician1053421065
  26. James Guida, DDSGeneral Practice Dentistry1306912050
  27. Halie Gulley, DDSDentist1770145716
  28. Jack GuoEndodontics1669110599
  29. Alexa GutierrezOrthopedic Physical Therapist1134606239
  30. Sandra Habermaas-Herold, CRNACertified Registered Nurse Anesthetist1487840450
  31. Kimberly Hackney, D.O.Pediatrics Physician1083842454
  32. Emily Hadsall, DCChiropractor1225304884
  33. Benjamin Hagen, MPTPhysical Therapist1922392448
  34. Janice Hager-Klein, L.P.C.Professional Counselor1356567119
  35. Lauren Hall, MOT/LOccupational Therapist1851262000
  36. Sarah Hall, ATCAthletic Trainer1083012017
  37. Jason Hamed, DCChiropractor1760518021
  38. Mitchell Hammack, DPTPhysical Therapist1477146462
  39. Emily Hammer, WHNP-BCWomen's Health Nurse Practitioner1841612850
  40. Mariah Hammond, RDRegistered Dietitian1174268676
  41. Lauren Hanson, RN, BSN, BSHC,HNB-BCRegistered Nurse1912876004
  42. Van Hargraves, MDFamily Medicine Physician1255326385
  43. Katherine Harkess, M.D.Obstetrics & Gynecology Physician1295116143
  44. Jean Harmon, M. ED., LPCProfessional Counselor1578714341
  45. Danielle HarperClinical Social Worker1750994620
  46. Jane HarrerSpeech-Language Pathologist1134362023
  47. Alexandra Harris, RD, LDRegistered Dietitian1174133532
  48. James Harris, CSFASurgical Physician Assistant1134955040
  49. Jeffrey Harris, DDSDentist1932336799
  50. Rachel Harris, NPNurse Practitioner1225499866

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.