| T23.661 | Corrosion of second degree back of right hand | NON-BILLABLE CODE |
| T23.661A | Corrosion of second degree back of right hand, initial encounter | BILLABLE CODE |
| T23.661D | Corrosion of second degree back of right hand, subsequent encounter | BILLABLE CODE |
| T23.661S | Corrosion of second degree back of right hand, sequela | BILLABLE CODE |
| T23.662 | Corrosion of second degree back of left hand | NON-BILLABLE CODE |
| T23.662A | Corrosion of second degree back of left hand, initial encounter | BILLABLE CODE |
| T23.662D | Corrosion of second degree back of left hand, subsequent encounter | BILLABLE CODE |
| T23.662S | Corrosion of second degree back of left hand, sequela | BILLABLE CODE |
| T23.669 | Corrosion of second degree back of unspecified hand | NON-BILLABLE CODE |
| T23.669A | Corrosion of second degree back of unspecified hand, initial encounter | BILLABLE CODE |
| T23.669D | Corrosion of second degree back of unspecified hand, subsequent encounter | BILLABLE CODE |
| T23.669S | Corrosion of second degree back of unspecified hand, sequela | BILLABLE CODE |
