Injury of ulnar nerve at wrs/hnd lv of left arm, sequela

This code signifies a long-term complication or late effect resulting from a past injury to the ulnar nerve specifically located at the wrist or hand level of the left arm. This could manifest as persistent pain, numbness, weakness, or functional impairment in the distribution of the ulnar nerve in the left hand, occurring after the initial acute injury has healed.

Apply this code when documenting a patient presenting with residual symptoms or conditions directly attributable to an old ulnar nerve injury at the left wrist or hand. This is appropriate for follow-up visits addressing chronic issues stemming from the original trauma, rather than the initial acute injury itself.

• Always use this code as a secondary diagnosis, following the code for the specific sequela (e.g., chronic pain, muscle atrophy).
• Ensure documentation clearly states the left arm and specifies the wrist/hand level of the ulnar nerve involvement.
• Verify that the "S" seventh character is appropriate for a sequela, indicating a late effect of the initial injury.