| S20.221 | Contusion of right back wall of thorax | NON-BILLABLE CODE |
| S20.221A | Contusion of right back wall of thorax, initial encounter | BILLABLE CODE |
| S20.221D | Contusion of right back wall of thorax, subsequent encounter | BILLABLE CODE |
| S20.221S | Contusion of right back wall of thorax, sequela | BILLABLE CODE |
| S20.222 | Contusion of left back wall of thorax | NON-BILLABLE CODE |
| S20.222A | Contusion of left back wall of thorax, initial encounter | BILLABLE CODE |
| S20.222D | Contusion of left back wall of thorax, subsequent encounter | BILLABLE CODE |
| S20.222S | Contusion of left back wall of thorax, sequela | BILLABLE CODE |
| S20.223 | Contusion of bilateral back wall of thorax | NON-BILLABLE CODE |
| S20.223A | Contusion of bilateral back wall of thorax, initial encounter | BILLABLE CODE |
| S20.223D | Contusion of bilateral back wall of thorax, subsequent encounter | BILLABLE CODE |
| S20.223S | Contusion of bilateral back wall of thorax, sequela | BILLABLE CODE |
| S20.224 | Contusion of middle back wall of thorax | NON-BILLABLE CODE |
| S20.224A | Contusion of middle back wall of thorax, initial encounter | BILLABLE CODE |
| S20.224D | Contusion of middle back wall of thorax, subsequent encounter | BILLABLE CODE |
| S20.224S | Contusion of middle back wall of thorax, sequela | BILLABLE CODE |
| S20.229 | Contusion of unspecified back wall of thorax | NON-BILLABLE CODE |
| S20.229A | Contusion of unspecified back wall of thorax, initial encounter | BILLABLE CODE |
| S20.229D | Contusion of unspecified back wall of thorax, subsequent encounter | BILLABLE CODE |
| S20.229S | Contusion of unspecified back wall of thorax, sequela | BILLABLE CODE |
