2007 ICD-9-CM Procedure 37.22 Left heart cardiac catheterization 37.22 is a specific code that can be used to specify a procedure 37.22 contains 2 index entries View the full Volume 3 37.* hierarchy 37.22 excludes: that with catheterization of right heart (37.23) Index entries containing 37.22: Catheterization -- see also Insertion, catheter cardiac (right) 37.21 left 37.22 combined with right heart 37.23 heart (right) 37.21 left 37.22 combined with right heart 37.23