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

This diagnosis code signifies damage to the ulnar nerve in the left arm, specifically occurring at or distal to the wrist. This type of injury can result in sensory deficits (numbness, tingling) in the little finger and half of the ring finger, as well as motor weakness affecting intrinsic hand muscles. It often presents with a characteristic "claw hand" deformity in severe cases.

Use this code for a patient presenting with an acute injury to the ulnar nerve affecting the left wrist or hand, such as from a laceration, crush injury, or fracture. It is appropriate for the initial assessment and treatment of the injury. This code would also be used for the initial encounter of a patient presenting with new onset symptoms directly attributable to such an injury.

• Ensure documentation clearly specifies the left arm and the injury location as the wrist or hand level.
• Verify this is the initial encounter for the injury; subsequent care would require a different encounter character.
• Look for supporting documentation of the mechanism of injury and neurological deficits consistent with ulnar nerve damage.