ICD-10-CM > S00-T88 > S20-S29 > S20 > S20.4 S20.4 Other and unspecified superficial injuries of back wall of thorax Non-Billable/Non-Specific Codes S20.40Unspecified superficial injuries of back wall of thoraxS20.401Unspecified superficial injuries of right back wall of thoraxS20.401A..., initial encounterS20.401D..., subsequent encounterS20.401S..., sequelaS20.402Unspecified superficial injuries of left back wall of thoraxS20.402A..., initial encounterS20.402D..., subsequent encounterS20.402S..., sequelaS20.409Unspecified superficial injuries of unspecified back wall of thoraxS20.409A..., initial encounterS20.409D..., subsequent encounterS20.409S..., sequelaS20.41Abrasion of back wall of thoraxS20.411Abrasion of right back wall of thoraxS20.411A..., initial encounterS20.411D..., subsequent encounterS20.411S..., sequelaS20.412Abrasion of left back wall of thoraxS20.412A..., initial encounterS20.412D..., subsequent encounterS20.412S..., sequelaS20.419Abrasion of unspecified back wall of thoraxS20.419A..., initial encounterS20.419D..., subsequent encounterS20.419S..., sequelaS20.42Blister (nonthermal) of back wall of thoraxS20.421Blister (nonthermal) of right back wall of thoraxS20.421A..., initial encounterS20.421D..., subsequent encounterS20.421S..., sequelaS20.422Blister (nonthermal) of left back wall of thoraxS20.422A..., initial encounterS20.422D..., subsequent encounterS20.422S..., sequelaS20.429Blister (nonthermal) of unspecified back wall of thoraxS20.429A..., initial encounterS20.429D..., subsequent encounterS20.429S..., sequelaS20.44External constriction of back wall of thoraxS20.441External constriction of right back wall of thoraxS20.441A..., initial encounterS20.441D..., subsequent encounterS20.441S..., sequelaS20.442External constriction of left back wall of thoraxS20.442A..., initial encounterS20.442D..., subsequent encounterS20.442S..., sequelaS20.449External constriction of unspecified back wall of thoraxS20.449A..., initial encounterS20.449D..., subsequent encounterS20.449S..., sequelaS20.45Superficial foreign body of back wall of thoraxS20.451Superficial foreign body of right back wall of thoraxS20.451A..., initial encounterS20.451D..., subsequent encounterS20.451S..., sequelaS20.452Superficial foreign body of left back wall of thoraxS20.452A..., initial encounterS20.452D..., subsequent encounterS20.452S..., sequelaS20.459Superficial foreign body of unspecified back wall of thoraxS20.459A..., initial encounterS20.459D..., subsequent encounterS20.459S..., sequelaS20.46Insect bite (nonvenomous) of back wall of thoraxS20.461Insect bite (nonvenomous) of right back wall of thoraxS20.461A..., initial encounterS20.461D..., subsequent encounterS20.461S..., sequelaS20.462Insect bite (nonvenomous) of left back wall of thoraxS20.462A..., initial encounterS20.462D..., subsequent encounterS20.462S..., sequelaS20.469Insect bite (nonvenomous) of unspecified back wall of thoraxS20.469A..., initial encounterS20.469D..., subsequent encounterS20.469S..., sequelaS20.47Other superficial bite of back wall of thoraxS20.471Other superficial bite of right back wall of thoraxS20.471A..., initial encounterS20.471D..., subsequent encounterS20.471S..., sequelaS20.472Other superficial bite of left back wall of thoraxS20.472A..., initial encounterS20.472D..., subsequent encounterS20.472S..., sequelaS20.479Other superficial bite of unspecified back wall of thoraxS20.479A..., initial encounterS20.479D..., subsequent encounterS20.479S..., sequela