NPPES file of Aug 9, 2026

Doctors and health care providers in Oak Lawn, IL

2,993 individual NPPES records list a practice address in Oak Lawn, 8th of 541 Illinois cities. The largest group is behavior technician: 251, 8% of the city's records, against 4% across Illinois. Page 40 of 60.

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

Oak Lawn in Illinois

  • Rank in Illinois8th of 541 cities by records
  • Share of the state1.2% of Illinois's records
  • Specialties present25 or more taxonomy codes
  • Top three groups20.9% of all records
  • Behavior Technician rank7th of the 10 Illinois cities with the most

Compared with Illinois as a whole, Oak Lawn has 9.4× the state's share of critical care medicine (internal medicine) physician records and 0.29× its share of clinical social worker records.

Providers in Oak Lawn, alphabetically

  1. Megan O'HaraSpeech-Language Pathologist1063563690
  2. Anne O'Malley, RD,LDNRegistered Dietitian1609808229
  3. Karen O'Mara, D.O.Critical Care Medicine (Internal Medicine) Physician1235112269
  4. Andrew O'Reilly, DOAdult Reconstructive Orthopaedic Surgery Physician1831696533
  5. Kimberly O'Shaughnessy, MS, RD, LDNRegistered Dietitian1023630282
  6. Arinzechukwu ObegoluPediatrics Physician1417652249
  7. Nicole Obermeyer, APRNFamily Nurse Practitioner1073270211
  8. Erika Ociepka, CRNACertified Registered Nurse Anesthetist1417254871
  9. Bianca OddoPhysician Assistant1619675592
  10. Adeeb Odeh, LCPCProfessional Counselor1427478726
  11. Jallwa Odeh, NP-CFamily Nurse Practitioner1598209041
  12. Samar OdehDentist1619420635
  13. Gladys Odoi, RNNurse Practitioner1942050174
  14. Walah OdtallahBehavior Technician1538051123
  15. Olajumoke OdunuyiAcute Care Nurse Practitioner1144972191
  16. Keisha Odunze, MDPediatrics Physician1457938946
  17. Crystal OehmenDiagnostic Radiology Physician1396350708
  18. Lauren Oganovich, PSY.D.Clinical Psychologist1245605831
  19. Tracey Ogdon, PNPPediatric Nurse Practitioner1407208101
  20. Michael Ogilvie, MD, MBAPlastic Surgery Physician1275853335
  21. Donna Oh, DOInternal Medicine Physician1326894791
  22. Cynthia Ohata, M.D.Family Medicine Physician1912949025
  23. Jacqueline OjedaBehavior Technician1770475972
  24. Anwuli Okoli, M.D.Pain Medicine (Anesthesiology) Physician1225090533
  25. Megan Okon, APNFamily Nurse Practitioner1407304884
  26. Chiedu Okonmah, DOInternal Medicine Physician1255130076
  27. Bernadette OkrasinskiOccupational Therapist1851803464
  28. Oyinkansola Okubanjo, M.D.Emergency Medicine Physician1669854667
  29. Charles OkungbowaDriver1144083411
  30. Osezua OlearNephrology Physician1346650249
  31. Krystyna Oleniacz-MillerFamily Nurse Practitioner1750853180
  32. Deborah Oleskowicz, MS, CGCGenetic Counselor (M.S.)1184884215
  33. Jana OliverSchool Counselor1972110294
  34. Michael Olivieri, M.D.Family Medicine Physician1124042189
  35. Lynda Olson, PHARM.D.Pharmacotherapy Pharmacist1982840773
  36. Toluwanimi Oludiran-Ayoade, MDInternal Medicine Physician1942989116
  37. Paul Omastiak, MDFamily Medicine Physician1821020124
  38. Muhammad Omer, M.D.Nephrology Physician1154529105
  39. Ellen Omi, MDTrauma Surgery Physician1487689816
  40. Janet Omole, MDInternal Medicine Physician1538801857
  41. Fely Ong, MSN, CCNSMedical-Surgical Clinical Nurse Specialist1124352125
  42. Carey OrelikOccupational Therapy Assistant1255688610
  43. Joanne Orfei, DOPsychiatry Physician1497098230
  44. Colleen Organ, DPTPhysical Therapist1669793170
  45. Aileen OrnelasBehavior Technician1447126222
  46. Raquel Ornelas, LPCCounselor1073804829
  47. Kenneth Orr, P.T.Physical Therapist1053475103
  48. Sinai OrtegaPediatric Occupational Therapist1801349527
  49. Nina Ortegon, NPFamily Nurse Practitioner1376508895
  50. Michael Osei, M.D.Physical Medicine & Rehabilitation Physician1710138599

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

Oak Lawn, Illinois appears in the CMS National Plan and Provider Enumeration System with 2,993 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 Oak Lawn - 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 Oak Lawn 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 Oak Lawn is weighted toward Behavior Technician (251 clinicians, followed by Physical Therapist with 203 and Internal Medicine Physician with 173). 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, Oak Lawn reports roughly 23.8 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 Illinois's most common specialties, Mental Health Counselor is the most prominent one with no provider currently listing a Oak Lawn practice address, a coverage gap Oak Lawn patients typically fill by traveling to a larger nearby hub.

For Oak Lawn 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 Oak Lawn, IL?

There are 2,993 registered healthcare providers in Oak Lawn, IL, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Oak Lawn?

The most common specialties in Oak Lawn are Behavior Technician, Physical Therapist, Internal Medicine Physician, Emergency Medicine Physician, Pediatrics Physician. Behavior Technician has the most providers with 251.

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.