S91.20Unspecified open wound of toe with damage to nail

S91.20 is the ICD-10-CM diagnosis code for unspecified open wound of toe with damage to nail. It belongs to category S91 (open wound of ankle, foot and toes), block S90-S99 (injuries to the ankle and foot) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 7 subcodes must be used instead.

Within S91.2, choose S91.20 (Unspecified open wound of toe with damage to nail) only when documentation doesn't support a more specific option: laceration without foreign body of toe with damage to nail (S91.21), laceration with foreign body of toe with damage to nail (S91.22), puncture wound without foreign body of toe with damage to nail (S91.23), puncture wound with foreign body of toe with damage to nail (S91.24) and open bite of toe with damage to nail (S91.25).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.