NPPES file of Aug 9, 2026

Doctors and health care providers in O Fallon, IL

1,077 individual NPPES records list a practice address in O Fallon, 44th of 541 Illinois cities. The largest group is behavior technician: 295, 27% of the city's records, against 4% across Illinois. Page 2 of 22.

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. Behavior Technician295
  2. Speech-Language Pathologist67
  3. Family Medicine Physician44
  4. Students in training43
  5. Behavior Analyst43
  6. Chiropractor35
  7. Family Nurse Practitioner32
  8. Pharmacist31

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

O Fallon in Illinois

  • Rank in Illinois44th of 541 cities by records
  • Share of the state0.4% of Illinois's records
  • Specialties present25 or more taxonomy codes
  • Top three groups37.7% of all records
  • Behavior Technician rank4th of the 10 Illinois cities with the most

Compared with Illinois as a whole, O Fallon has 7× the state's share of behavior technician records and 0.25× its share of mental health counselor records.

Providers in O Fallon, alphabetically

  1. Rebecca Barron, BCBA-DBehavior Analyst1881215259
  2. George Bates, MS, LCPCMental Health Counselor1013901818
  3. Dana Baugher, FNPFamily Nurse Practitioner1497268965
  4. Nathalia Baum, OTR/LOccupational Therapist1669223939
  5. Patricia Bealer, LMTSpecialist1023389137
  6. Harold Bean, D.D.S.General Practice Dentistry1235233438
  7. Jessica Beasley GuntherClinical Social Worker1417596156
  8. Christa BechererBehavior Analyst1770085672
  9. Natalie Beck, RNRegistered Nurse1588890552
  10. Shelbi Beeding, BCBABehavior Analyst1386214021
  11. Benjamin Beggs, MDFamily Medicine Physician1386174381
  12. Tynesha Bejoile, BTBehavior Technician1316802416
  13. Randa Belba, RNRegistered Nurse1548959166
  14. Candyce Bell, LCPCCounselor1235779208
  15. Chelsea Bell, FNP-CFamily Nurse Practitioner1407230188
  16. Hannah BellBehavior Technician1225911423
  17. Alex BelongyStudent in an Organized Health Care Education/Training Program1144087511
  18. Joselyn BenderBehavior Technician1073492195
  19. Jacob Bennett, RBTBehavior Technician1396381380
  20. Christina Bereda, D.O.Family Medicine Physician1437386083
  21. Zachary Berg, M.D.Pulmonary Disease Physician1255741278
  22. Ameniah Bernard, CADCAddiction (Substance Use Disorder) Counselor1598109647
  23. Sally Berry, BEHAVIOR TECHNICIANBehavior Technician1730801622
  24. Kaylah BessBehavior Technician1629888433
  25. Jameilyn Best-HansonBehavior Technician1316839111
  26. Kevin Beyersdorfer, DDSPediatric Dentistry1295814002
  27. Shrinikethan BharanidharanBehavior Technician1093287427
  28. Harathi Bhooma, MDFamily Medicine Physician1407424732
  29. Vinay Bhooma, M.D.Family Medicine Physician1730317702
  30. Casey Biancur, LCSWClinical Social Worker1588549679
  31. Gregory Biddulph, DMDDentist1932237856
  32. Grace Biggers, RBTBehavior Technician1760118475
  33. Sean BirdStudent in an Organized Health Care Education/Training Program1568270411
  34. Lindsey BischoffBehavior Technician1740940394
  35. Karen Blackwell, P.A.Physician Assistant1487983664
  36. Mia Blair, RBTBehavior Technician1063219715
  37. Patrick Bloecher, MDFamily Medicine Physician1023672409
  38. Diane Blue, RPHPharmacist1194201160
  39. Lori BluePharmacist1669078127
  40. Amanda BobbyPhysical Therapy Assistant1043068141
  41. Brianna BochantinBehavior Technician1255040135
  42. Tom BolenHearing Instrument Specialist1083833024
  43. Shayne BollheimerPhysical Therapy Assistant1346001963
  44. Anne BollmeierGeneral Practice Dentistry1235544024
  45. Ellen Bollmeier, DMDGeneral Practice Dentistry1568559532
  46. Heaven BonesBehavior Technician1750191672
  47. Shantnecia BonnerBehavior Technician1891504403
  48. Jeremy Book, D.C.Chiropractor1659529667
  49. Alicia Borawski, MPTPhysical Therapist1871717231
  50. Jami Bossart, M.A., CCC-SLPSpeech-Language Pathologist1013348796

The largest Illinois cities

  1. Chicago63,379
  2. Springfield4,997
  3. Naperville4,634
  4. Peoria4,621
  5. Evanston4,013

All of Illinois →

How to read this directory

O Fallon, Illinois appears in the CMS National Plan and Provider Enumeration System with 1,077 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 Behavior Technician (295 clinicians, followed by Speech-Language Pathologist with 67 and Family Medicine Physician with 44). 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 Illinois's population, O Fallon reports roughly 8.6 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 Illinois's most common specialties, Internal Medicine Physician 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, IL?

There are 1,077 registered healthcare providers in O Fallon, IL, 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 Behavior Technician, Speech-Language Pathologist, Family Medicine Physician, Student in an Organized Health Care Education/Training Program, Behavior Analyst. Behavior Technician has the most providers with 295.

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.