| T25.421 | Corrosion of unspecified degree of right foot | NON-BILLABLE CODE |
| T25.421A | Corrosion of unspecified degree of right foot, initial encounter | BILLABLE CODE |
| T25.421D | Corrosion of unspecified degree of right foot, subsequent encounter | BILLABLE CODE |
| T25.421S | Corrosion of unspecified degree of right foot, sequela | BILLABLE CODE |
| T25.422 | Corrosion of unspecified degree of left foot | NON-BILLABLE CODE |
| T25.422A | Corrosion of unspecified degree of left foot, initial encounter | BILLABLE CODE |
| T25.422D | Corrosion of unspecified degree of left foot, subsequent encounter | BILLABLE CODE |
| T25.422S | Corrosion of unspecified degree of left foot, sequela | BILLABLE CODE |
| T25.429 | Corrosion of unspecified degree of unspecified foot | NON-BILLABLE CODE |
| T25.429A | Corrosion of unspecified degree of unspecified foot, initial encounter | BILLABLE CODE |
| T25.429D | Corrosion of unspecified degree of unspecified foot, subsequent encounter | BILLABLE CODE |
| T25.429S | Corrosion of unspecified degree of unspecified foot, sequela | BILLABLE CODE |
