| T23.611 | Corrosion of second degree of right thumb (nail) | NON-BILLABLE CODE |
| T23.611A | Corrosion of second degree of right thumb (nail), initial encounter | BILLABLE CODE |
| T23.611D | Corrosion of second degree of right thumb (nail), subsequent encounter | BILLABLE CODE |
| T23.611S | Corrosion of second degree of right thumb (nail), sequela | BILLABLE CODE |
| T23.612 | Corrosion of second degree of left thumb (nail) | NON-BILLABLE CODE |
| T23.612A | Corrosion of second degree of left thumb (nail), initial encounter | BILLABLE CODE |
| T23.612D | Corrosion of second degree of left thumb (nail), subsequent encounter | BILLABLE CODE |
| T23.612S | Corrosion of second degree of left thumb (nail), sequela | BILLABLE CODE |
| T23.619 | Corrosion of second degree of unspecified thumb (nail) | NON-BILLABLE CODE |
| T23.619A | Corrosion of second degree of unspecified thumb (nail), initial encounter | BILLABLE CODE |
| T23.619D | Corrosion of second degree of unspecified thumb (nail), subsequent encounter | BILLABLE CODE |
| T23.619S | Corrosion of second degree of unspecified thumb (nail), sequela | BILLABLE CODE |
