NPPES file of Aug 9, 2026

Occupational Therapy Assistant in Illinois

1,498 NPPES records list occupational therapy assistant with a practice address in Illinois, 12 per 100,000 residents, the 27th highest rate of 51. Chicago and Glenview have the most; each record links to the provider's NPI and the Illinois license search. Page 30 of 30.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 224Z00000X · method

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Chicago has the most, 156

  1. Chicago156
  2. Glenview126
  3. Orland Park43
  4. Springfield33
  5. Peoria30

Occupational Therapy Assistant records in Illinois

  1. Marcus Williams, COTA/LChicago, IL 606081750925111
  2. Mary Williams, COTA/LWauconda, IL 600841730604018
  3. Rhonda Williams, COTADolton, IL 604191417178096
  4. Thomas Williamson, COTAJoliet, IL 604331497205496
  5. Aubree WillisChicago, IL 606261982158317
  6. Ann Wilson, COTASavoy, IL 618741023678844
  7. Cheryl WilsonMarion, IL 629591952714503
  8. Janice WilsonOswego, IL 605431811694573
  9. Laura Wilson, C-OTASpringfield, IL 627041760833719
  10. Maxine Wilson, COTAChicago Ridge, IL 606151871801555
  11. Shawnece Wilson, COTA/LOrland Park, IL 604671063275279
  12. Allison Wingate, COTA/LNormal, IL 617611962928838
  13. Brandie Winters, COTA/LLincolnwood, IL 607121649853599
  14. Cara WintersChicago, IL 606471275264178
  15. Rachelle WiseSouth Holland, IL 604731861906141
  16. Ashley WisemanLawrenceville, IL 624391568926731
  17. Holly WitvoetChicago, IL 606261013378645
  18. Nancy Woehlke, COTA/LGlenview, IL 600261417338179
  19. Tarah WoitGlenview, IL 600261740634146
  20. Marie Wolever, COTA/LMoline, IL 612651184035099
  21. Courtney Woll, COTA/LEdwardsville, IL 620251407586043
  22. Beth Woodcock, OTA/LTaylorville, IL 625681225393788
  23. Agatha WoodsOrland Park, IL 604671275920530
  24. Cheryle WoodsOak Lawn, IL 604531457198533
  25. Jaime Woods, COTAFrankfort, IL 604231720239940
  26. Stephanie WoodsMedora, IL 620631417366899
  27. Kathleen Wortel, COTANew Lenox, IL 604511659829844
  28. Gail Wright, COTA/LChicago Heights, IL 604111326559402
  29. Joan Wright, COTA/LCoal Valley, IL 612401952590770
  30. Marzanna Wroblewska, COTAChicago, IL 606141063536464
  31. Christa Wyman-HundrieserFreeport, IL 610321750742565
  32. Joanna WysockaGlenview, IL 600261205126646
  33. Brianna YangGlenview, IL 600261447896246
  34. Joey Yates, COTA/LDecatur, IL 625261386909166
  35. Karma Young, COTA/LBloomington, IL 617011063821882
  36. Jeffre Youngblood, COTA/LChicago, IL 606181336607571
  37. Jennifer Zachacki, COTA/LNorth Riverside, IL 605461558915538
  38. Alyssa ZajeskiJoliet, IL 604351083494686
  39. Stephanie ZaramaGlenview, IL 600261508428756
  40. Dianna Zarndt Buettner, COTA/LFox River Grove, IL 600211982258299
  41. Jayvee ZarragaNaperville, IL 605641821460627
  42. Jeannete Zavala, COTABourbonnais, IL 609141801519103
  43. Catherine Zeiss, COTA/LGlenview, IL 600261770870669
  44. Stephanie ZieglerGlenview, IL 600261700453891
  45. Carol Zilz, COTA/LDecatur, IL 625211972061901
  46. Janie ZimmermanOdin, IL 628701497304448
  47. Steve ZomparelliOlympia Fields, IL 604611912537838
  48. Kim Zoss, COTANorthfield, IL 600931487969382

Source: CMS NPPES, primary taxonomy 224Z00000X: records by practice city and the list of records, file of Aug 9, 2026.

Illinois ranks 27 of 51 per resident

  1. North Carolina13
  2. Connecticut12
  3. South Dakota12
  4. Illinois12
  5. Nebraska12
  6. Mississippi12
  7. 50 states and D.C.12

Source: CMS NPPES, primary taxonomy 224Z00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

0.1% of these records appear in a Medicare file, against 0.1% nationally

A Medicare file here is Part D prescribing (2024), a MIPS score (2023), an Open Payments record (2024) or Medicare group billing (CMS Doctors and Clinicians). A record outside them may still see patients: these files cover Medicare only.

  1. Illinois0.1%
  2. United States0.1%

Occupational Therapy Assistant records in Illinois, measured

  • In a Medicare file1 of 1,498 · 0.1% here, 0.1% nationally
  • In the CMS Doctors and Clinicians file2 · 0.1% here, 0.1% nationally
  • Not updated in five years or more1,131 · 75.5% here, 72.0% nationally

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 224Z00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

1,498 NPPES records list occupational therapy assistant (224Z00000X) as their primary taxonomy with a practice address in Illinois: 12 per 100,000 residents against 12 nationally (50 states and D.C.). Chicago has 156 of them (10%).

A record is a registration a provider made and keeps up to date: it shows neither that the provider is licensed nor that they still practice there. The state's own license search is the check.

States with a similar number

  1. Wisconsin1,460
  2. North Carolina1,357
  3. California1,869
  4. Indiana1,091

States with a similar rate per 100,000

  1. South Dakota12.0
  2. Nebraska11.9
  3. Mississippi11.9
  4. Colorado11.7

The largest states

  1. Texas4,278
  2. Florida3,825
  3. New York2,732
  4. Ohio2,421
  5. Pennsylvania2,155

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy; 2023 Census population estimates. A registry record is not a license.

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.