Unsp injury of ulnar artery at forarm lv, left arm, sequela

This code indicates a long-term complication or late effect stemming from an unspecified injury to the ulnar artery in the left forearm. The original injury may have been a laceration, contusion, or other trauma, and the current condition represents a residual problem such as chronic pain, nerve damage, or impaired circulation directly attributable to that past arterial damage.

Apply this code when documenting a current condition that is a direct consequence of a previous, unspecified ulnar artery injury in the left forearm, and the acute phase of the original injury has passed. This is appropriate for follow-up encounters addressing chronic issues related to the initial trauma, rather than the initial injury itself.

• Always assign an additional code to describe the specific nature of the sequela (e.g., chronic pain, nonunion, nerve entrapment).
• Ensure documentation clearly links the current condition to a past ulnar artery injury in the left forearm.
• Do not use this code for the initial treatment of an acute ulnar artery injury; use an acute injury code from the S55.002 category instead.