Concerns have been raised regarding the delivery of outpatient physical therapy services, specifically regarding the appropriate use of one-on-one codes as opposed to the group code. This page provides APTA's interpretation of the one-on-one and group codes. In addition, it includes patient care scenarios and APTA's analysis of the proper coding of those scenarios. Although these scenarios have been submitted to CMS, APTA has received no response from the agency as to its agreement or disagreement with APTA's interpretations. This page should not be construed as legal advice. The contents are intended for general informational purposes only, and readers are urged to consult their own legal counsel with regard to their own specific circumstances.