Modifier 57 (decision for surgery) is added to an E/M code if the surgeon sees the patient and then, based upon the evaluation of the patient, decides to proceed with surgery either the same or the following day.
The US Department of Defense Dictionary of Military and Associated Terms. defines command and control as: The exercise of authority and direction by a properly designated commander over assigned and attached forces in the accomplishment of the mission.
Area Command (Unified Area Command): An organization established (1) to oversee the management of multiple incidents that are each being handled by an ICS organization or (2) to oversee the management of large or multiple incidents to which several Incident Management Teams have been assigned.