S90.9Unspecified superficial injury of ankle, foot and toe

S90.9 is the ICD-10-CM diagnosis code for unspecified superficial injury of ankle, foot and toe. It belongs to category S90 (superficial injury 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 3 subcodes must be used instead.

Within S90, choose S90.9 (Unspecified superficial injury of ankle, foot and toe) only when documentation doesn't support a more specific option: contusion of ankle (S90.0), contusion of toe without damage to nail (S90.1), contusion of toe with damage to nail (S90.2), contusion of foot (S90.3), other superficial injuries of toe (S90.4), other superficial injuries of ankle (S90.5) and other superficial injuries of foot (S90.8).

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.