What does the symbol "O" in the Current Procedural Terminology (CPT) reference indicate?

The symbol "O" in the Current Procedural Terminology (CPT) coding system indicates that the code is a reinstated or recycled code. This means that the code may have been previously used in past coding cycles but was later removed or deactivated for some reason. When a code is reinstated, it is reinstated with the understanding that it has been reviewed and deemed appropriate for use again. This is an important aspect of coding, as it helps coders understand the status and relevance of specific codes within the healthcare system.

The correct answer highlights the need for knowledge of the dynamic nature of CPT codes, which can change over time based on revisions in medical practices, technology, and regulatory requirements. Coders must be aware of these symbols to ensure accurate billing and coding practices, as using an incorrect or outdated code can lead to billing errors and potential compliance issues.