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 25 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. Mary Shattuck, COTALincoln, IL 626561174667307
  2. Donna ShawChicago, IL 606101821622648
  3. Sharry ShawBellwood, IL 601041366719031
  4. Tonya Shaw, COTA/LUrbana, IL 618011619282415
  5. Neah SheetsSaint David, IL 615631043190036
  6. Rachel SheppardAlton, IL 620021881225944
  7. Ryleigh ShoemakerFairbury, IL 617391205591724
  8. Margaret Shook, COTA/LRockford, IL 611141881721264
  9. Ashley Shreve, COTA/LGlenview, IL 600261649886771
  10. Jalena Sidler, COTA/LChicago, IL 606221689255838
  11. Christopher Sigourney, PTABourbonnais, IL 609141477903003
  12. Carmen SillersOrland Park, IL 604671700605805
  13. Chelsea SimpsonMattoon, IL 619381659917409
  14. Denise Simpson, COTA/LRiverdale, IL 608271982048526
  15. Michael Simpson, COTA/LChicago, IL 606201629412549
  16. Tasha SimsPosen, IL 604691962792317
  17. Michael Sincore, COTA/LGlenview, IL 600261992398879
  18. Rachel Singer, COTAChicago, IL 606251245003094
  19. Debra Sinwelski, COTAOrland Park, IL 604671376751743
  20. Krystal Sipp, COTARiverdale, IL 608271518132653
  21. Katarzyna Siudyla, COTACrystal Lake, IL 600141568037901
  22. Diane Slakaitis, COTA/LChicago, IL 606111780832055
  23. Julia SlatteryWilmette, IL 600911164123428
  24. Shelly Sledge, OTA/LCentralia, IL 628011548896582
  25. Karen Slinde-Lueth, COTARockford, IL 611121770720435
  26. Michael Slinkard, COTA/LJacksonville, IL 626501184249344
  27. Kenna Smicker, COTA/LKankakee, IL 609011548683287
  28. Alana SmithPark Ridge, IL 600681831733997
  29. Ashley SmithTroy, IL 622941811362064
  30. Billy SmithHarrisburg, IL 629461184873317
  31. Catherine Smith, COTA/LGeneva, IL 601341609113430
  32. Christine Smith, COTA/LGodfrey, IL 620351013674670
  33. Collette Smith, COTA/LChicago, IL 606161790054161
  34. Isabella Smith, COTA/LChampaign, IL 618221447803507
  35. Kati SmithClinton, IL 617271356870851
  36. Kayla SmithMount Sterling, IL 623531497213664
  37. Kimberly SmithSt Charles, IL 601741629713490
  38. Leslie Smith, COTAElgin, IL 601231609417781
  39. Nicole Smith, COTAPittsfield, IL 623631295142305
  40. Sandrea SmithMorrison, IL 612701962056358
  41. Toni SmithLansing, IL 604381538604889
  42. Gineal Smith Taylor, COTAGlenview, IL 600261124295050
  43. Quaniya Smith-HayesAurora, IL 605031790611341
  44. Alexandria Snedden, COTA/LLombard, IL 601481144972845
  45. Tricia Snell, COTA/LRobinson, IL 624541780276089
  46. Dawn SnyderRockford, IL 611141992148894
  47. Karen Snyder, COTABelleville, IL 622231013131762
  48. Donna SoensProspect Heights, IL 600701447723432
  49. Monika Solarz, COTA/LChicago, IL 606231558726117
  50. Caressa Sorensen, COTACrystal Lake, IL 600141154090447

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.