2007 ICD-9-CM Procedure 81.64 Fusion or refusion of 9 or more vertebrae 81.64 is a specific code that can be used to specify a procedure 81.64 contains 2 index entries View the full Volume 3 81.* hierarchy Index entries containing 81.64: Fusion spinal (with graft) (with internal fixation) (with instrumentation) 81.00 number of vertebrae - see codes 81.62 - 81.64 Refusion spinal, NOS 81.30 number of vertebrae - see codes 81.62 - 81.64