S55Injury of blood vessels at forearm level

S55 is the ICD-10-CM diagnosis code for injury of blood vessels at forearm level. It belongs to block S50-S59 (injuries to the elbow and forearm) 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 5 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: S55.0 (level), S55.1 (level), S55.2 (level), S55.8 (level) and S55.9 (level).

The conditions in its Excludes2 note aren't part of S55, but may be coded alongside it if the patient has both: injury of blood vessels at wrist and hand level (S65.-) and injury of brachial vessels (S45.1-S45.2).

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