| Full description | Corrosion of unspecified degree of single right finger (nail) except thumb, subsequent encounter |
| Billable | Yes |
| Chapter | Chapter 19: Injury, poisoning and certain other consequences of external causes (S00-T88) |
| Section | Burns and corrosions of external body surface, specified by site (T20-T25) |
| Parent code | T23.421 — Corros unsp degree of single r finger (nail) except thumb |