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 25 of 25.
The 8 largest groups in O Fallon
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
- Mary Withoelter, NURSE PRACTITIONERNurse Practitioner1982188389
- Wilda Witt, LPCMental Health Counselor1144542374
- Stephanie Wittkoetter, AGNP-CPrimary Care Nurse Practitioner1568172260
- Kyle Wogtech, CRNACertified Registered Nurse Anesthetist1134655053
- Roger Wohldmann, LPC, CASACCounselor1265505580
- Shannon Wood, FNP-BCFamily Nurse Practitioner1003293762
- Deborah Woods, MA, LPC, NCCProfessional Counselor1013359256
- Nancy Woods, RN, FNP-CFamily Nurse Practitioner1821031501
- Kathryn Worzel, LCSWClinical Social Worker1518973874
- Devan Wright, PT, DPT, CSCSPhysical Therapist1992260590
- Erin Wright, RPHPharmacist1316547946
- Thomas Wright, MDPhlebology Physician1417935974
- Brandon Wubben, MDEmergency Medicine Physician1205327111
- Rhonda Wurm, L.P.C.Mental Health Counselor1508904749
- Sarah WybleSpeech-Language Pathologist1679410518
- Felix Yesquen, D.C.Chiropractor1073632717
- Kevin YinInternal Medicine Physician1689311011
- Cecilia Yu, MDPediatrics Physician1003959248
- Mahjuba ZehraGeneral Practice Dentistry1235029752
- Renee Zesch, FNPFamily Nurse Practitioner1457586919
- Nadia Zia, MDInternal Medicine Physician1134164825
- Jessica Zielinski, SLPSpeech-Language Pathologist1639501984
- Sheila Ziff, MS OTR/LOccupational Therapist1932307121
- Beth Zimmer, MDFamily Medicine Physician1548221823
- Jamie Zimmerman, MS, CCC-SLPSpeech-Language Pathologist1629119664
The largest Missouri cities
- Saint Louis27,605
- Kansas City13,759
- Springfield6,403
- Columbia6,004
- Joplin2,443
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.