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

This code signifies a long-term complication or residual effect stemming from a past injury to the ulnar nerve specifically located at the wrist or hand level of the patient's right arm. These sequelae can manifest as persistent pain, numbness, weakness, or functional impairment in the affected area, indicating that the acute injury has resolved but its impact remains.

Apply this code when documenting a patient presenting with ongoing symptoms directly attributable to a previous ulnar nerve injury in the right wrist or hand. This is appropriate for follow-up encounters addressing chronic issues like "claw hand" deformity, persistent sensory deficits, or muscle atrophy that developed after the initial acute injury.

• Ensure documentation clearly links the current symptoms to a previous ulnar nerve injury at the specified anatomical site.
• Always append the appropriate seventh character "S" for sequela, indicating a late effect.
• Do not use this code for acute injuries; instead, refer to the acute injury codes within the S64.0- category.