Ask Dr. Z

"Accessed the right greater saphenous vein, and a venogram was done. The catheter was then advanced into the right hypogastric vein, and venogram was done again. The catheter was then advanced into the left hypogastric vein, and a venogram was done. The catheter was then advanced into the left femoral vein, and a competent valve was encountered at the saphenofemoral junction. Contrast was injected. None was refluxed into the leg. Catheter was then pulled back, and a completion cavogram was done. The catheter then was advanced into the left renal vein, and a selective renal venogram was done. Several unsuccessful attempts to locate the gonadal vein, and it was not identified on the cavogram. The right renal vein was selected, and a venogram was done."  The codes we came up with are 36012, 36011, 36011, 75833, 75825, and 75822. I am questioning the catheter placements mostly.  Can you clarify this?