Occupational Therapy Assistant: NPI taxonomy code 224Z00000X
Taxonomy code 224Z00000X is Occupational Therapy Assistant, in the Respiratory, Developmental, Rehabilitative and Restorative Service Providers group.
41,897 active NPIs list it as their primary specialty (0.4% of all).
| Code | 224Z00000X |
|---|---|
| Group | Respiratory, Developmental, Rehabilitative and Restorative Service Providers |
| Classification | Occupational Therapy Assistant |
| Used for | individual providers (the code is in NUCC's Individual section) |
| Active NPIs, primary specialty | 41,897 (41,705 individuals, 192 organizations) |
What NUCC says: An occupational therapy assistant is a person who has graduated from an occupational therapy assistant program accredited by the Accreditation Council for Occupational Therapy Education (ACOTE) or predecessor organizations, has successfully completed a period of supervised fieldwork experience… (excerpt of the NUCC 26.1 definition)
Find Occupational Therapy Assistant providers
Search the registry for providers listing Occupational Therapy Assistant. Pick a state to narrow it down.
Where they are
| State | Active NPIs | Share |
|---|---|---|
| Texas | 4,309 | 10.3% |
| Florida | 3,855 | 9.2% |
| New York | 2,750 | 6.6% |
| Ohio | 2,499 | 6.0% |
| Pennsylvania | 2,163 | 5.2% |
| California | 1,892 | 4.5% |
| Illinois | 1,508 | 3.6% |
| Wisconsin | 1,479 | 3.5% |
| North Carolina | 1,375 | 3.3% |
| Indiana | 1,095 | 2.6% |
Top states by practice location, from the NPPES file of September 13, 2026.
Related specialties
- Environmental Modification Occupational Therapy Assistant 132
- Driving and Community Mobility Occupational Therapy Assistant 79
- Feeding, Eating & Swallowing Occupational Therapy Assistant 67
Specialty definitions are from the NUCC Health Care Provider Taxonomy (version 26.1). Which code to use on a claim depends on your NPPES record and your payer. See taxonomy codes explained.