991 Effects of reduced temperature 
991.0 Frostbite of face convert 991.0 to ICD-10-CM 991.1 Frostbite of hand convert 991.1 to ICD-10-CM 991.2 Frostbite of foot convert 991.2 to ICD-10-CM 991.3 Frostbite of other and unspecified sites convert 991.3 to ICD-10-CM 991.4 Immersion foot convert 991.4 to ICD-10-CM 991.5 Chilblains convert 991.5 to ICD-10-CM 991.6 Hypothermia convert 991.6 to ICD-10-CM 991.8 Other specified effects of reduced temperature convert 991.8 to ICD-10-CM
991.9 Unspecified effect of reduced temperature convert 991.9 to ICD-10-CM