Doctors and health care providers in Saint Louis, MO
27,605 individual NPPES records list a practice address in Saint Louis, 1st of 317 Missouri cities. The largest group is clinical social worker: 1,474, 5% of the city's records, against 5% across Missouri. Page 361 of 553.
The 8 largest groups in Saint Louis
Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.
Saint Louis in Missouri
- Rank in Missouri1st of 317 cities by records
- Share of the state24.8% of Missouri's records
- Specialties present25 or more taxonomy codes
- Top three groups14.1% of all records
- Clinical Social Worker rank1st of the 10 Missouri cities with the most
Compared with Missouri as a whole, Saint Louis has 1.9× the state's share of diagnostic radiology physician records and 0.55× its share of family nurse practitioner records.
Providers in Saint Louis, alphabetically
- Shawn O'Connor, MDNeonatal-Perinatal Medicine Physician1215240585
- Stephanie O'Connor, DPTPhysical Therapist1851409502
- Thomas O'Connor, DMDGeneral Practice Dentistry1740431931
- Ashley O'Daniel, LMSWClinical Social Worker1225445976
- Christine O'DayPhysical Therapist1235262692
- Michael O'Day, D.O.Family Medicine Physician1376500140
- Rachel O'Dell, MDEmergency Medicine Physician1487339446
- Mary O'Dell-LenardSocial Worker1578007654
- Andrew O'Donnell, P.T.Physical Therapist1649584145
- Carly O'DonnellPhysical Therapist1629849195
- Theresa O'Donoghue, MS, CCC-SLPSpeech-Language Pathologist1942509435
- Natalie O'Guin, M.S.Speech-Language Pathologist1730443979
- Eileen O'Halloran, M.D.Surgery Physician1447549571
- John O'Keefe, M.D.Neurology Physician1891790788
- John O'Keefe, M.D.Diagnostic Radiology Physician1548604440
- Regis O'Keefe, MDOrthopaedic Surgery Physician1497797757
- Candice O'KelleyHome Health Aide1073177259
- Elizabeth O'LearyOccupational Therapist1376219311
- Kara O'Leary, PH.D.Clinical Psychologist1932537446
- Kathleen O'Leary, CRNACertified Registered Nurse Anesthetist1437139532
- Maddison O'Leary, SLPSpeech-Language Pathologist1114598703
- Molly O'Leary, LPCMental Health Counselor1154898260
- Mary O'Linn, R.N.Community Health Registered Nurse1205966009
- Joan O'Malley, P.T.Physical Therapist1811196140
- John O'MalleyOrthopaedic Surgery Physician1467133660
- Heather O'MaraAcute Care Nurse Practitioner1962860510
- Elizabeth O'Neal, DPTPediatric Physical Therapist1316092810
- Jeanette O'Neal, PA-CPhysician Assistant1396105698
- Ronald O'Neal, CRNACertified Registered Nurse Anesthetist1134273774
- Carol O'NeilOccupational Therapist1386777654
- Jerome O'Neil, MDPediatrics Physician1982675641
- Lauren O'NeilCommunity Health Worker1922587245
- Micaela O'Neil-Callahan, M.D.Obstetrics & Gynecology Physician1568783850
- Addie O'NeillPediatric Nutrition Registered Dietitian1851261291
- Emily O'Neill, OTR/LOccupational Therapist1437874336
- Maria O'Neill, M.D.Anesthesiology Physician1669435434
- Andrea O'RiordanObstetrics & Gynecology Physician1861325425
- Brendan O'Saben, PHARM. DPharmacist1336978519
- Pamela O'Steen, AA-SAnesthesiologist Assistant1770015851
- Catherine O'Sullivan, MSW, LCSWClinical Social Worker1184160285
- Christopher O'SullivanVascular & Interventional Radiology Physician1417537051
- Kayla O'Toole, MDAnesthesiology Physician1285650127
- Madison O'Toole, ACNPAcute Care Nurse Practitioner1952021032
- Lisa Oakley, MDDiagnostic Radiology Physician1588681241
- Nathan Oatis, MSW, LCSWClinical Social Worker1295505667
- Rehema ObareBehavior Technician1659251528
- Ahmad Obeidat, MDHospitalist Physician1538731401
- Jeanne OberdanMarriage & Family Therapist1093249005
- Mitchell Oberhelman, DOObstetrics & Gynecology Physician1487391702
- Alicia Oberle, MDEmergency Medicine Physician1295098663
The largest Missouri cities
- Kansas City13,759
- Springfield6,403
- Columbia6,004
- Joplin2,443
- Chesterfield2,132
How to read this directory
Saint Louis, Missouri appears in the CMS National Plan and Provider Enumeration System with 27,605 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 Saint Louis - 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 Saint Louis 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 Saint Louis is weighted toward Clinical Social Worker (1,474 clinicians, followed by Student in an Organized Health Care Education/Training Program with 1,338 and Speech-Language Pathologist with 1,083). 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, Saint Louis reports roughly 445.5 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 Saint Louis practice address, a coverage gap Saint Louis patients typically fill by traveling to a larger nearby hub.
For Saint Louis 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 Saint Louis, MO?
There are 27,605 registered healthcare providers in Saint Louis, MO, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.
What are the most common medical specialties in Saint Louis?
The most common specialties in Saint Louis are Clinical Social Worker, Student in an Organized Health Care Education/Training Program, Speech-Language Pathologist, Pharmacist, Professional Counselor. Clinical Social Worker has the most providers with 1,474.
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.