Know what bundles you may -- and will never -- separate Problem: "I understand the Correct Coding Initiative (CCI) but get confused when I try to read the CCI listings," says Lana Flatt, CPC, office manager of OB/GYN Associates in Cookeville, Tenn. Solution: Refer to this easy-to-decipher chart to know what codes pairs you may separate with a modifier, and what codes carriers will never pay. Note: The code in the left-most column represents the comprehensive code.