Which code denotes the highest level of service in the Evaluation and Management section of CPT?

The code that denotes the highest level of service in the Evaluation and Management (E/M) section of the Current Procedural Terminology (CPT) is 99215. This code is used for a visit that requires a higher level of medical decision-making, more extensive documentation, and a more complex visit than lower level codes like 99214, 99213, or 99212. Specifically, 99215 is typically associated with a comprehensive evaluation that may involve more detailed histories, examinations, and substantial coordination of care.

In the context of the E/M coding system, each code corresponds to specific criteria that must be met, including the complexity of the patient's condition and the amount of time spent on the visit. Since 99215 is the highest code within this series, it represents the most significant level of service provided, reflecting both the time and resources involved in addressing the patient's healthcare needs during that encounter.