2007 ICD-9-CM Procedure 81.01 Atlas-axis spinal fusion 81.01 is a specific code that can be used to specify a procedure 81.01 contains 4 index entries View the full Volume 3 81.* hierarchy 81.01 also known as: Craniocervical fusion by anterior, transoral, or posterior technique C1-C2 fusion by anterior, transoral, or posterior technique Occiput C2 fusion by anterior, transoral, or posterior technique Index entries containing 81.01: Fusion spinal (with graft) (with internal fixation) (with instrumentation) 81.00 atlas-axis (anterior transoral) (posterior) 81.01 for pseudarthrosis 81.31 cervical (C2 level or below) NEC 81.02 C1-C2 level (anterior) (posterior) 81.01 for pseudarthrosis 81.31 craniocervical (anterior transoral) (posterior) 81.01 for pseudarthrosis 81.31 occiput-C2 (anterior transoral) (posterior) 81.01 for pseudarthrosis 81.31