I am a coding student and I have a question on the order of codes. The scenario is basically: pre op dx as intrauterine pregnancy at term. Frank breech, causing obstruction. Post op dx: Ceasrean delivery due to breech. Operation performed: Primary low transverse cesarean section. The codes are 652.2 Breech presentation without mention of version, and 660.01 obstruction caused by malposition of fetus at onset of labor. I am having a hard time understanding the order which is 660.01 652.21. I looked thru the guidelines and still wasnt understanding the order. I was wondering if someone could explain it for me. Thanks!