| ICD-10 Code | Description |
| T20.40XA | Corrosion of unspecified degree of head, face, and neck, unspecified site, initial encounter |
| T20.40XD | Corrosion of unspecified degree of head, face, and neck, unspecified site, subsequent encounter |
| T20.40XS | Corrosion of unspecified degree of head, face, and neck, unspecified site, sequela |
| T20.411A | Corrosion of unspecified degree of right ear [any part, except ear drum], initial encounter |
| T20.411D | Corrosion of unspecified degree of right ear [any part, except ear drum], subsequent encounter |
| T20.411S | Corrosion of unspecified degree of right ear [any part, except ear drum], sequela |
| T20.412A | Corrosion of unspecified degree of left ear [any part, except ear drum], initial encounter |
| T20.412D | Corrosion of unspecified degree of left ear [any part, except ear drum], subsequent encounter |
| T20.412S | Corrosion of unspecified degree of left ear [any part, except ear drum], sequela |
| T20.419A | Corrosion of unspecified degree of unspecified ear [any part, except ear drum], initial encounter |
| T20.419D | Corrosion of unspecified degree of unspecified ear [any part, except ear drum], subsequent encounter |
| T20.419S | Corrosion of unspecified degree of unspecified ear [any part, except ear drum], sequela |
| T20.42XA | Corrosion of unspecified degree of lip(s), initial encounter |
| T20.42XD | Corrosion of unspecified degree of lip(s), subsequent encounter |
| T20.42XS | Corrosion of unspecified degree of lip(s), sequela |
| T20.43XA | Corrosion of unspecified degree of chin, initial encounter |
| T20.43XD | Corrosion of unspecified degree of chin, subsequent encounter |
| T20.43XS | Corrosion of unspecified degree of chin, sequela |
| T20.44XA | Corrosion of unspecified degree of nose (septum), initial encounter |
| T20.44XD | Corrosion of unspecified degree of nose (septum), subsequent encounter |
| T20.44XS | Corrosion of unspecified degree of nose (septum), sequela |
| T20.45XA | Corrosion of unspecified degree of scalp [any part], initial encounter |
| T20.45XD | Corrosion of unspecified degree of scalp [any part], subsequent encounter |
| T20.45XS | Corrosion of unspecified degree of scalp [any part], sequela |
| T20.46XA | Corrosion of unspecified degree of forehead and cheek, initial encounter |
| T20.46XD | Corrosion of unspecified degree of forehead and cheek, subsequent encounter |
| T20.46XS | Corrosion of unspecified degree of forehead and cheek, sequela |
| T20.47XA | Corrosion of unspecified degree of neck, initial encounter |
| T20.47XD | Corrosion of unspecified degree of neck, subsequent encounter |
| T20.47XS | Corrosion of unspecified degree of neck, sequela |
| T20.49XA | Corrosion of unspecified degree of multiple sites of head, face, and neck, initial encounter |
| T20.49XD | Corrosion of unspecified degree of multiple sites of head, face, and neck, subsequent encounter |
| T20.49XS | Corrosion of unspecified degree of multiple sites of head, face, and neck, sequela |
