2007 ICD-9-CM Procedure 37.33 Excision or destruction of other lesion or tissue of heart, open approach 37.33 is a specific code that can be used to specify a procedure 37.33 contains 13 index entries View the full Volume 3 37.* hierarchy 37.33 also known as: Ablation of heart tissue (cryoablation) (electrocurrent) (laser) (microwave) (radiofrequency) (resection), open chest approach Cox-maze procedure Maze procedure Modified maze procedure, trans-thoracic approach 37.33 excludes: ablation,excision or destruction of lesion or tissue of heart, endovascular approach (37.34) Index entries containing 37.33: Ablation lesion heart maze procedure (Cox-maze) open (trans-thoracic) approach 37.33 trans-thoracic approach 37.33 Destruction lesion (local) heart 37.33 by catheter ablation 37.34 Excision cardioma 37.33 diverticulum ventricle, heart 37.33 lesion (local) atrium 37.33 heart 37.33 myocardium 37.33 ventricle (heart) 37.33 Myocardiectomy (infarcted area) 37.33 Operation maze procedure (ablation or destruction of heart tissue) by incision (open) 37.33 trans-thoracic approach 37.33 Resection -- see also Excision, by site myocardium 37.33