Lack of a classification system for occupational therapy (OT) rehabilitation interventions for traumatic spinal cord injury (SCI) rehabilitation in the United States makes conducting outcomes research difficult. This article describes an OT SCI rehabilitation taxonomy (system to categorize and classify treatments). OT clinicians and researchers from 6 SCI rehabilitation centers developed a taxonomy to describe details of each OT session. This effort is part of the SCIRehab study, which uses the practice-based evidence, observational research methodology to examine current treatment processes without changing existing practice. The OT taxonomy consists of 26 OT activities (eg, training on activities of daily living, communication, home management skills, wheelchair mobility, bed mobility, transfers, balance, strengthening, stretching, equipment evaluation, and community reintegration)