2007 ICD-9-CM Procedure 37.73 Initial insertion of transvenous lead [electrode] into atrium 37.73 is a specific code that can be used to specify a procedure 37.73 contains 2 index entries View the full Volume 3 37.* hierarchy 37.73 excludes: insertion of temporary transvenous pacemaker system (37.78) replacement of atrial and/or ventricular lead(s) (37.76) Index entries containing 37.73: Implant, implantation electrode(s) cardiac (initial) (transvenous) 37.70 atrium (initial) 37.73 replacement 37.76 Insertion electrode(s) heart (initial) (transvenous) 37.70 atrium (initial) 37.73 replacement 37.76