| S20.401 | Unspecified superficial injuries of right back wall of thorax | NON-BILLABLE CODE |
| S20.401A | Unspecified superficial injuries of right back wall of thorax, initial encounter | BILLABLE CODE |
| S20.401D | Unspecified superficial injuries of right back wall of thorax, subsequent encounter | BILLABLE CODE |
| S20.401S | Unspecified superficial injuries of right back wall of thorax, sequela | BILLABLE CODE |
| S20.402 | Unspecified superficial injuries of left back wall of thorax | NON-BILLABLE CODE |
| S20.402A | Unspecified superficial injuries of left back wall of thorax, initial encounter | BILLABLE CODE |
| S20.402D | Unspecified superficial injuries of left back wall of thorax, subsequent encounter | BILLABLE CODE |
| S20.402S | Unspecified superficial injuries of left back wall of thorax, sequela | BILLABLE CODE |
| S20.409 | Unspecified superficial injuries of unspecified back wall of thorax | NON-BILLABLE CODE |
| S20.409A | Unspecified superficial injuries of unspecified back wall of thorax, initial encounter | BILLABLE CODE |
| S20.409D | Unspecified superficial injuries of unspecified back wall of thorax, subsequent encounter | BILLABLE CODE |
| S20.409S | Unspecified superficial injuries of unspecified back wall of thorax, sequela | BILLABLE CODE |
