Which statement is true?

The statement that modifier 50 is added to codes to report a bilateral procedure is accurate. This modifier is specifically used to indicate that a procedure has been performed on both sides of the body during the same session. For example, if a physician performs a procedure on both knees, the use of modifier 50 informs the payer that this is considered a bilateral procedure, affecting how reimbursement is processed.

Understanding the proper application of modifier 50 is crucial for accurate coding and billing. This modifier ensures that the documentation reflects the bilateral nature of the procedure, which can have implications for CPT coding as well as the reimbursement amount since many payers might have specific policies concerning bilateral procedures.

In contrast, other options are not correct because modifier 50 does not pertain to unilateral procedures, nor is it relevant only to the ambulatory surgery setting; it applies across various settings as long as the procedure is bilateral. Additionally, not all respiratory system CPT codes are considered bilateral procedures, as many can be reported as unilateral or might not require a modifier at all based on the specific circumstances.