| T23.411 | Corrosion of unspecified degree of right thumb (nail) | NON-BILLABLE CODE |
| T23.411A | Corrosion of unspecified degree of right thumb (nail), initial encounter | BILLABLE CODE |
| T23.411D | Corrosion of unspecified degree of right thumb (nail), subsequent encounter | BILLABLE CODE |
| T23.411S | Corrosion of unspecified degree of right thumb (nail), sequela | BILLABLE CODE |
| T23.412 | Corrosion of unspecified degree of left thumb (nail) | NON-BILLABLE CODE |
| T23.412A | Corrosion of unspecified degree of left thumb (nail), initial encounter | BILLABLE CODE |
| T23.412D | Corrosion of unspecified degree of left thumb (nail), subsequent encounter | BILLABLE CODE |
| T23.412S | Corrosion of unspecified degree of left thumb (nail), sequela | BILLABLE CODE |
| T23.419 | Corrosion of unspecified degree of unspecified thumb (nail) | NON-BILLABLE CODE |
| T23.419A | Corrosion of unspecified degree of unspecified thumb (nail), initial encounter | BILLABLE CODE |
| T23.419D | Corrosion of unspecified degree of unspecified thumb (nail), subsequent encounter | BILLABLE CODE |
| T23.419S | Corrosion of unspecified degree of unspecified thumb (nail), sequela | BILLABLE CODE |
