2007 ICD-9-CM Procedure 81.33 Refusion of other cervical spine, posterior technique 81.33 is a specific code that can be used to specify a procedure 81.33 contains 2 index entries View the full Volume 3 81.* hierarchy 81.33 also known as: Arthrodesis of C2 level or below: posterior (interbody) technique posterolateral technique Index entries containing 81.33: Fusion spinal (with graft) (with internal fixation) (with instrumentation) 81.00 cervical (C2 level or below) NEC 81.02 posterior (interbody), posterolateral technique 81.03 for pseudarthrosis 81.33 Refusion spinal, NOS 81.30 cervical (C2 level or below) NEC 81.32 posterior (interbody), posterolateral technique 81.33