| S21.201 | Unspecified open wound of right back wall of thorax without penetration into thoracic cavity | NON-BILLABLE CODE |
| S21.201A | Unspecified open wound of right back wall of thorax without penetration into thoracic cavity, initial encounter | BILLABLE CODE |
| S21.201D | Unspecified open wound of right back wall of thorax without penetration into thoracic cavity, subsequent encounter | BILLABLE CODE |
| S21.201S | Unspecified open wound of right back wall of thorax without penetration into thoracic cavity, sequela | BILLABLE CODE |
| S21.202 | Unspecified open wound of left back wall of thorax without penetration into thoracic cavity | NON-BILLABLE CODE |
| S21.202A | Unspecified open wound of left back wall of thorax without penetration into thoracic cavity, initial encounter | BILLABLE CODE |
| S21.202D | Unspecified open wound of left back wall of thorax without penetration into thoracic cavity, subsequent encounter | BILLABLE CODE |
| S21.202S | Unspecified open wound of left back wall of thorax without penetration into thoracic cavity, sequela | BILLABLE CODE |
| S21.209 | Unspecified open wound of unspecified back wall of thorax without penetration into thoracic cavity | NON-BILLABLE CODE |
| S21.209A | Unspecified open wound of unspecified back wall of thorax without penetration into thoracic cavity, initial encounter | BILLABLE CODE |
| S21.209D | Unspecified open wound of unspecified back wall of thorax without penetration into thoracic cavity, subsequent encounter | BILLABLE CODE |
| S21.209S | Unspecified open wound of unspecified back wall of thorax without penetration into thoracic cavity, sequela | BILLABLE CODE |
