2007 ICD-9-CM Procedure 89.6 Circulatory monitoring 89.6 is a non-specific code that should not be used to specify a procedure View the full Volume 3 89.* hierarchy 89.6 excludes: electrocardiographic monitoring during surgery -- omit code implantation or replacement of subcutaneous device for intracardiac hemodynamic monitoring (00.57) insertion or replacement of implantable pressure sensor (lead) for intracardiac hemodynamic monitoring (00.56)