1. additional codes are used for the number of vessels treated (00.40-00.43) AND The number of stents inserted(00.45/00.48), if multiple stents are inserted.
So, you must code the Procedure on the stent, Insertion(#) of stents( this may be one or more), and the type (1 or 2) stent.
Therefore, you must code at least 3 items for the stent, and of course, the ICD-9 code that after study
2. If a vessel bifurcation was done you may list this once
00.44 Procedure on vessel bifurcation along with the codes listed above.