Hello: I work for Colon & Rectal Surgeons. During the course of a left colon resection, our doctor discovered a colouterine fistula which he then repaired. Other than using those dreaded unlisted procedures which we never get paid for, I'm unable to find anything that defines this procedure. I reached out to an OB/GYN practice and they were also unable to assist me with this. Can anyone give me any advice on this? It would be greatly appreciated!