| S20.311 | Abrasion of right front wall of thorax | NON-BILLABLE CODE |
| S20.311A | Abrasion of right front wall of thorax, initial encounter | BILLABLE CODE |
| S20.311D | Abrasion of right front wall of thorax, subsequent encounter | BILLABLE CODE |
| S20.311S | Abrasion of right front wall of thorax, sequela | BILLABLE CODE |
| S20.312 | Abrasion of left front wall of thorax | NON-BILLABLE CODE |
| S20.312A | Abrasion of left front wall of thorax, initial encounter | BILLABLE CODE |
| S20.312D | Abrasion of left front wall of thorax, subsequent encounter | BILLABLE CODE |
| S20.312S | Abrasion of left front wall of thorax, sequela | BILLABLE CODE |
| S20.313 | Abrasion of bilateral front wall of thorax | NON-BILLABLE CODE |
| S20.313A | Abrasion of bilateral front wall of thorax, initial encounter | BILLABLE CODE |
| S20.313D | Abrasion of bilateral front wall of thorax, subsequent encounter | BILLABLE CODE |
| S20.313S | Abrasion of bilateral front wall of thorax, sequela | BILLABLE CODE |
| S20.314 | Abrasion of middle front wall of thorax | NON-BILLABLE CODE |
| S20.314A | Abrasion of middle front wall of thorax, initial encounter | BILLABLE CODE |
| S20.314D | Abrasion of middle front wall of thorax, subsequent encounter | BILLABLE CODE |
| S20.314S | Abrasion of middle front wall of thorax, sequela | BILLABLE CODE |
| S20.319 | Abrasion of unspecified front wall of thorax | NON-BILLABLE CODE |
| S20.319A | Abrasion of unspecified front wall of thorax, initial encounter | BILLABLE CODE |
| S20.319D | Abrasion of unspecified front wall of thorax, subsequent encounter | BILLABLE CODE |
| S20.319S | Abrasion of unspecified front wall of thorax, sequela | BILLABLE CODE |
