Occupational Therapy Billing Units: 2025 Guide

More broadly, the "billing unit rule" can refer to the general principle that medical services are billed in specific units. These units might be based on time (e.g., 15-minute increments in OT), the number of procedures performed, or even particular codes assigned to different services.

Common billing mistakes in occupational therapy can cause reimbursement delays and claim denials. Ensure accurate medical and therapy history documentation with details like codes and goals addressed. Avoid incorrect coding and modifier misuse by consulting the AOTA for current guidelines. Stay updated on annual coding changes from the AMA and verify patient insurance coverage before service delivery.

The American Occupational Therapy Association (AOTA) provides a comprehensive list of current codes.