Contusion of back unspecified icd 10 July 8, 2019 16 32 64 128 Contusion of back unspecified laterality icd 10 Contusion of unspecified back wall of thorax icd 10 Contusion of unspecified back wall of thorax initial encounter icd 10 Back contusion icd 10 Upper back contusion icd 10 Contusion upper extremity icd 10