S66.299 - Other specified 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 S66.29 - Other specified injury of extensor muscle, fascia and tendon of thumb at wrist and hand level S66.299 - Other specified injury of extensor muscle, fascia and tendon of unspecified thumb at wrist and hand level