| S21.301 | Unspecified open wound of right front wall of thorax with penetration into thoracic cavity | NON-BILLABLE CODE |
| S21.301A | Unspecified open wound of right front wall of thorax with penetration into thoracic cavity, initial encounter | BILLABLE CODE |
| S21.301D | Unspecified open wound of right front wall of thorax with penetration into thoracic cavity, subsequent encounter | BILLABLE CODE |
| S21.301S | Unspecified open wound of right front wall of thorax with penetration into thoracic cavity, sequela | BILLABLE CODE |
| S21.302 | Unspecified open wound of left front wall of thorax with penetration into thoracic cavity | NON-BILLABLE CODE |
| S21.302A | Unspecified open wound of left front wall of thorax with penetration into thoracic cavity, initial encounter | BILLABLE CODE |
| S21.302D | Unspecified open wound of left front wall of thorax with penetration into thoracic cavity, subsequent encounter | BILLABLE CODE |
| S21.302S | Unspecified open wound of left front wall of thorax with penetration into thoracic cavity, sequela | BILLABLE CODE |
| S21.309 | Unspecified open wound of unspecified front wall of thorax with penetration into thoracic cavity | NON-BILLABLE CODE |
| S21.309A | Unspecified open wound of unspecified front wall of thorax with penetration into thoracic cavity, initial encounter | BILLABLE CODE |
| S21.309D | Unspecified open wound of unspecified front wall of thorax with penetration into thoracic cavity, subsequent encounter | BILLABLE CODE |
| S21.309S | Unspecified open wound of unspecified front wall of thorax with penetration into thoracic cavity, sequela | BILLABLE CODE |
