2007 ICD-9-CM Procedure 00.31 Computer assisted surgery with ct/cta 00.31 is a specific code that can be used to specify a procedure 00.31 contains 2 index entries View the full Volume 3 00.* hierarchy Index entries containing 00.31: Scan, scanning C.A.T. (computerized axial tomography) 88.38 with computer assisted surgery (CAS) 00.31 Surgery computer assisted (CAS) 00.39 CAS with CT/CTA 00.31