Y28.1Contact with knife, undetermined intent

Y28.1 is the ICD-10-CM diagnosis code for contact with knife, undetermined intent. It belongs to category Y28 (contact with sharp object, undetermined intent), block Y21-Y33 (event of undetermined intent) and chapter 20 (external causes of morbidity). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within Y28 (contact with sharp object, undetermined intent), Y28.1 is specifically for contact with knife, undetermined intent. Related codes cover sharp glass, undetermined intent (Y28.0), sword or dagger, undetermined intent (Y28.2), other sharp object, undetermined intent (Y28.8) and unspecified sharp object, undetermined intent (Y28.9).

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.