2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Injury And Poisoning 800-999 > Other And Unspecified Effects Of External Causes 990-995 > Effects Of Reduced Temperature 991.* > 2008 ICD-9-CM Diagnosis 991.9 Unspecified effect of reduced temperature  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM 991.9 can be accessed here. 991.9 is a specific code that can be used to specify a diagnosis 991.9 contains 12 index entries View the ICD-9-CM Volume 1 991.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. 991.9 also known as: Effects of freezing or excessive cold NOS Index entries containing 991.9: Cold 460 effects of 991.9 specified effect NEC 991.8 excessive 991.9 specified effect NEC 991.8 exposure to 991.9 specified effect NEC 991.8 Congelation 991.9 Effect, adverse NEC cold (temperature) (weather) 991.9 chilblains 991.5 frostbite - see Frostbite specified effect NEC 991.8 reduced temperature 991.9 frostbite - see Frostbite immersion, foot (hand) 991.4 specified effect NEC 991.8 Excess, excessive, excessively cold 991.9 specified effect NEC 991.8 Exposure 994.9 cold 991.9 specified effect NEC 991.8 Freezing 991.9 specified effect NEC 991.8 Frozen 991.9 pelvis 620.8 shoulder 726.0 Temperature cold, trauma from 991.9 newborn 778.2 specified effect NEC 991.8 Weather, weathered effects of cold NEC 991.9 specified effect NEC 991.8