2007 ICD-9-CM Procedure 31.91 Division of laryngeal nerve 31.91 is a specific code that can be used to specify a procedure 31.91 contains 3 index entries View the full Volume 3 31.* hierarchy Index entries containing 31.91: Division laryngeal nerve (external) (recurrent) (superior) 31.91 nerve (cranial) (peripheral) NEC 04.03 laryngeal (external) (recurrent) (superior) 31.91 Injection (into) (hypodermically) (intramuscularly) (intravenously) (acting locally or systemically) nerve (cranial) (peripheral) 04.80 laryngeal (external) (recurrent) (superior) 31.91