I work for Vascular Surgery and we are running into the issue of denials after the procedure code has been authorized. Insurance is denying stating an S&I code should've been authorized as well, however, in the book under many different surgery codes it states S&I is included. Can someone please explain this to me? If we're not looking in the correct area for the S&I codes we need to figure out the solution because I was under the impression everything in the CPT book is what we go by?