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

This code signifies damage to the ulnar nerve in the left wrist or hand region, occurring during a follow-up visit for the initial injury. This could involve conditions like nerve compression, laceration, or contusion affecting the motor and sensory functions supplied by the ulnar nerve in the specified anatomical area.

Use this code for patients presenting for ongoing treatment, evaluation, or management of a previously diagnosed ulnar nerve injury at the left wrist or hand. This includes visits for physical therapy, medication adjustments, wound care, or follow-up imaging related to the initial trauma.

• Ensure the documentation clearly specifies the left arm and the wrist and hand level of the ulnar nerve injury.
• Verify that the encounter is for a subsequent visit related to the initial injury, not the initial treatment.
• Always code the underlying cause of the injury (e.g., fall, laceration) as an external cause code (V, W, X, Y category) in addition to this diagnosis code.