Inj extensor musc/fasc/tend l thm at wrs/hnd lv, sequela

This code signifies a long-term or late effect of an injury to an extensor muscle, fascia, or tendon of the left thumb, specifically at the wrist or hand level. This could include chronic pain, weakness, limited range of motion, or other persistent issues resulting from a previous acute injury.

Apply this code when documenting a patient presenting with ongoing complications or residual problems from a past injury to the extensor structures of the left thumb. This is appropriate for follow-up visits addressing the chronic sequelae, not the initial acute injury.

• Always use an external cause code (V00-Y99) in conjunction with this code to describe the original injury.
• Ensure documentation clearly indicates the injury is to the left thumb and specifies the extensor structures.
• This "S" seventh character indicates sequela, meaning the acute phase of the injury has passed and the patient is experiencing residual effects.