2007 ICD-9-CM Procedure 89.42 Masters' two-step stress test 89.42 is a specific code that can be used to specify a procedure 89.42 contains 3 index entries View the full Volume 3 89.* hierarchy Index entries containing 89.42: Masters' stress test (two-step) 89.42 Test, testing (for) cardiac (vascular) stress 89.44 Masters' two-step 89.42 Masters' two-step stress (cardiac) 89.42