Select the True Statement Regarding Correct Coding of Coronary Artery

Select the true statement regarding correct coding of Coronary Artery Bypass Grafting:

A) Codes 33517-33530, Combined arterial-venus grafting for coronary bypass, are add-on codes and may not be used alone or as a primary procedure
B) Combined codes for arterial-venus grafting are always sequenced first when this procedure is performed
C) Codes 33510-33516, Venous grafting only for coronary artery, are to be used as primary procedure codes any time a combined arterial and venous grafting procedure is performed
D) Codes 33533-33548, Arterial grafting for coronary bypass, require use of modifier -51 when used with combined codes for arterial-venus grafting