2007 ICD-9-CM Procedure 37.23 Combined right and left heart cardiac catheterization 37.23 is a specific code that can be used to specify a procedure 37.23 contains 6 index entries View the full Volume 3 37.* hierarchy Index entries containing 37.23: Catheterization -- see also Insertion, catheter cardiac (right) 37.21 combined left and right 37.23 left 37.22 combined with right heart 37.23 right 37.21 combined with left heart 37.23 heart (right) 37.21 combined left and right 37.23 left 37.22 combined with right heart 37.23 right 37.21 combined with left heart 37.23