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.
(b) Chain-of-Command - The chain-of-command is an organized hierarchy of authority. (c) Unity of Command - Unity of command means that everyone reports to one person. and one person is in charge of each function. (d) Span of Control - The optimum span of control ratio is 1:5, which is one supervisor. to five subordinates. The span of control can range from a ratio of 1:3 to 1:7 while. maintaining effective control.