Occupational Therapy Assistant Taxonomy Code 224Z00000X
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 required by the accredited occupational therapy assistant program, has passed a nationally recognized entry-level examination for occupational therapy assistants, and fulfills state requirements for licensure, certification, or registration. An occupational therapy assistant provides interventions under the supervision of an occupational therapist which emphasize the therapeutic use of everyday life activities (i.e., occupations) with individuals or groups for the purpose of facilitating participation in roles and situations and in home, school, workplace, community and other settings. Occupational therapy services are provided for the purpose of promoting health and wellness and are provided to those who have or are at risk for developing an illness, injury, disease, disorder, condition, impairment, disability, activity limitation, or participation restriction. Occupational therapy assistants address the physical, cognitive, psychosocial, sensory, and other aspects of occupational performance in a variety of contexts to support engagement in everyday life activities that affect health, well-being, and quality of life.
Code Details for 224Z00000X
About Taxonomy Code 224Z00000X
The taxonomy code 224Z00000X identifies Occupational Therapy Assistant within the Respiratory, Developmental, Rehabilitative And Restorative Service Providers provider grouping. It is a Level II — Classification code, which names a provider's occupation or service within the broader provider grouping.
NPI records show 46,181 registered providers whose primary or secondary taxonomy is this code. Of these, 1,793 (4%) are registered as organizations and 44,388 (96%) as individual providers. The states with the most occupational therapy assistant providers are Texas (4,497), Florida (4,329), New York (2,922).
Taxonomy codes are self-selected by the provider based on their education and training; they describe the provider's type and specialty, not the specific services rendered.
Provider Composition & Statistics
Gender is recorded for individual providers only; organizations are not gendered. Source: NPPES, last updated 2026-06-28T00:00:00.
View all 46,181 providersOccupational Therapy Assistant Providers by State
Provider counts by U.S. state and territory. Select a state to open its provider directory.
Frequently Asked Questions
224Z00000X questionsNPPES lists 46,181 registered providers with this taxonomy code (Occupational Therapy Assistant).
Both. About 4% of these providers are registered as organizations and 96% as individuals.
This taxonomy code does not map to a Medicare specialty code in the current crosswalk.
It is a Level II - Classification code in the NUCC Health Care Provider Taxonomy set.
Use the "Providers by state" directory on this page to open the list of occupational therapy assistant providers registered in any U.S. state.
Source: National Uniform Claim Committee (NUCC) Health Care Provider Taxonomy code set, Version 25.1. Provider counts from NPPES. See nucc.org.