2007 ICD-9-CM Procedure 00.3 Computer assisted surgery (cas) 00.3 is a non-specific code that should not be used to specify a procedure View the full Volume 3 00.* hierarchy 00.3 also known as: CT-free navigation Image guided navigation (IGN) Image guided surgery (IGS) Imageless navigation Code also diagnostic or therapeutic procedure 00.3 excludes: stereotactic frame application only (93.59)