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

This code signifies a long-term complication or residual effect stemming from a previous injury to an extensor muscle, fascia, or tendon of an unspecified thumb, affecting the wrist and hand region. This could include chronic pain, weakness, limited range of motion, or deformity that persists after the initial healing period of the acute injury.

Use this code when documenting a patient presenting with ongoing issues directly attributable to an old injury of the thumb's extensor mechanism. This applies when the acute injury has resolved, but the patient continues to experience sequelae. It is appropriate for follow-up visits addressing these chronic complications.

• Always use this code as a secondary diagnosis, following the primary diagnosis describing the specific sequela (e.g., chronic pain, muscle weakness).
• Ensure documentation clearly links the current condition to a past injury of the thumb's extensor structures.
• The "S" at the end indicates sequela; do not use this code for acute injuries.