Which code accurately reflects coronary artery bypass graft of three venous vessels?

The correct code for a coronary artery bypass graft involving three venous vessels is represented by the combination of codes 33512 and 33530.

The code 33512 refers specifically to a coronary artery bypass graft (CABG) using a vein graft for one or more venous bypasses, and the 33530 code pertains to the addition of a second venous graft; when combined, they accurately reflect the procedure of bypassing three veins. In coding, it is essential to capture the specifics of the surgery accurately, including the number of bypasses and the types of grafts used, to ensure proper documentation and reimbursement.

Other codes listed do not pertain to coronary bypass procedures. For example, one of the other options relates to heart rhythm device insertion, which is entirely different from coronary artery bypass grafting. Thus, the selection of A, which provides a representation of three venous grafts used in CABG, is the most precise and relevant choice.