S66.209 - Unspecified injury of extensor muscle, fascia and tendon of unspecified thumb at wrist and hand level S66.2 - Injury of extensor muscle, fascia and tendon of thumb at wrist and hand level S66.20 - Unspecified injury of extensor muscle, fascia and tendon of thumb at wrist and hand level S66.209 - Unspecified injury of extensor muscle, fascia and tendon of unspecified thumb at wrist and hand level