where is the ramus artery
The Ramus is a branch off the Left Main and lies between the LAD and LCX and not everyone has a Ramus. Instead of the Left Main splitting into 2 vessels (LD And LC) it splits into 3 vessles (LD, LC and Ramus). But the Ramus is considered a branch (and not a vessel)of the either the LD or the LC so the branch rules apply. You are placing a stent on 1 vessel and another stent on a branch of a 2nd vessel with both coming off of the Left Main. Medicare has been pretty clear that they will only consider interventions on the 3 vessles identified by CPT, the LD, LC and RC.