Final answer:
Modifiers are used to indicate special circumstances in a medical procedure, such as bilateral procedures.
Step-by-step explanation:
Modifiers are used to indicate a special circumstance in a medical procedure, such as when a procedure is performed on both sides of the body (bilateral procedures). Modifiers are codes that are added to the main procedure code to provide additional information.
For example, the modifier -50 is used to indicate a bilateral procedure, such as a bilateral hip replacement. The main procedure code would be assigned with the modifier -50 to specify that the procedure was performed on both sides of the body.
Therefore, the correct answer is Modifiers.
Learn more about Modifiers