Problem: A CPT code that might need a modifier if more than one cardiovascular procedure is done during the same visit? Why would that be important for coding and billing? HINT: Check out the Cardiovascular Surgery section (30000-39999 range). Look for the parenthetical notes and instructional guidelines beneath specific codes, they'll often tell you: When a code is bundled with another If a modifier is allowed or required Whether a code is add-on only (which affects modifier use) Need Assignment Help?