2007 ICD-9-CM Procedure 99.81 Hypothermia (central) (local) 99.81 is a specific code that can be used to specify a procedure 99.81 contains 1 index entry View the full Volume 3 99.* hierarchy 99.81 excludes: gastric cooling (96.31) gastric freezing (96.32) that incidental to open heart surgery (39.62) Index entries containing 99.81: Hypothermia (central) (local) 99.81 gastric (cooling) 96.31 freezing 96.32 systemic (in open heart surgery) 39.62