2007 ICD-9-CM Procedure 04.12 Open biopsy of cranial or peripheral nerve or ganglion 04.12 is a specific code that can be used to specify a procedure 04.12 contains 2 index entries View the full Volume 3 04.* hierarchy Index entries containing 04.12: Biopsy ganglion (cranial) (peripheral) NEC 04.11 open 04.12 nerve (cranial) (peripheral) NEC 04.11 open 04.12