NPPES file of Aug 9, 2026

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 365 of 553.

CMS NPPES registry, file of Aug 9, 2026 · method · Verify with CMS →

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

  1. Stephen Olson, M.D.Anatomic Pathology & Clinical Pathology Physician1760663942
  2. Tracy Olson, PMHNPPsychiatric/Mental Health Nurse Practitioner1114638566
  3. Michael Olufawo, MDDiagnostic Radiology Physician1033962360
  4. Franklin Olumba, MDSurgery Physician1144880170
  5. James OmalleyMental Health Counselor1174147615
  6. Hasaan OmarStudent in an Organized Health Care Education/Training Program1487383550
  7. Salma Omar, DOStudent in an Organized Health Care Education/Training Program1881453140
  8. Michael Ombrello, M.D.Student in an Organized Health Care Education/Training Program1235330515
  9. Alvan Omeni, M.D.Sleep Medicine (Internal Medicine) Physician1285965855
  10. Fatima Omer, M.B.B.S.Student in an Organized Health Care Education/Training Program1417758335
  11. Lejla OmerovicMental Health Counselor1326983172
  12. Kenan Omurtag, MDReproductive Endocrinology Physician1477738136
  13. Marissa Omurtag, M.D.Anesthesiology Physician1093992679
  14. Jude Onaghise, MDInternal Medicine Physician1124376942
  15. Lindsey Onate, LD, RDNRegistered Dietitian1750988499
  16. Megan Onder, FNP-CFamily Nurse Practitioner1821540311
  17. Robert Onder, M.D.Allergy Physician1164533295
  18. Maureen Oneill, PACMedical Physician Assistant1962518621
  19. Stefanie Oneill, LPCProfessional Counselor1558797431
  20. Danier Ong, MDEmergency Medicine Physician1255073912
  21. Peter Ong, DMDDentist1386401750
  22. Ellen OnicaAudiologist1407591225
  23. Moyosore Onifade, M.D.Internal Medicine Physician1669586954
  24. Ellie Onstott, MDStudent in an Organized Health Care Education/Training Program1508755984
  25. Odinakachukwu Onuigbo, MDStudent in an Organized Health Care Education/Training Program1962338178
  26. Kalu Onuma, M.D.,Psychiatry Physician1447415518
  27. Bibian OnyeachoNurse's Aide1104220045
  28. Otuomasirichi Onyema, DNP, MPH, FNP-BCFamily Nurse Practitioner1861048225
  29. Obinna Onyeukwu, MDEmergency Medicine Physician1255081006
  30. Irene Opai Tetteh, MDAnesthesiology Physician1598781734
  31. Peter Oppelt, MDMedical Oncology Physician1639332968
  32. Beth Oppenheim, OTRPediatric Occupational Therapist1952455651
  33. Jerilyn Oppenheimer, MSW,LCSWCase Manager/Care Coordinator1336627694
  34. Allison Optican, M.D.Psychiatry Physician1629429865
  35. Kennedy OrbanBehavior Technician1518688290
  36. Jennifer Orbe, DOPediatric Emergency Medicine (Pediatrics) Physician1629498555
  37. Lauren Orbik, OTROccupational Therapist1275378580
  38. Megan Orchard, PAMedical Physician Assistant1457658254
  39. Rebecca Oree, AAAnesthesiologist Assistant1619727336
  40. Cassandra OrellanaNeonatal-Perinatal Medicine Physician1841466349
  41. Erin Orf, MDHospitalist Physician1073995593
  42. Nikhil Organti, MDCritical Care Medicine (Internal Medicine) Physician1891925558
  43. Irene Oriaifo, MDPediatric Emergency Medicine (Pediatrics) Physician1083966790
  44. Michael Orihuela, LCSWClinical Social Worker1821398694
  45. Kehinde OrimayeBehavior Technician1538031307
  46. Elmire OriolBehavior Technician1912831942
  47. Angela OristeClinical Social Worker1053199018
  48. Angela Orlando, CPNPPediatric Nurse Practitioner1265725030
  49. Daniel Orlet, RNPsychiatric/Mental Health Registered Nurse1639346331
  50. Katrina Orlet, MSW, LCSWClinical Social Worker1679829980

The largest Missouri cities

  1. Kansas City13,759
  2. Springfield6,403
  3. Columbia6,004
  4. Joplin2,443
  5. Chesterfield2,132

All of Missouri →

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.