2007 ICD-9-CM Procedure 35 Operations on valves and septa of heart 35 is a non-specific code that should not be used to specify a procedure View the full Volume 3 35.* hierarchy Code also cardiopulmonary bypass [extracorporeal circulation] [heart-lung machine] (39.61) 35 includes: sternotomy (median) (transverse) as operative approach thoracotomy as operative approach