S66.390 - Other injury of extensor muscle, fascia and tendon of right index finger at wrist and hand level S66.3 - Injury of extensor muscle, fascia and tendon of other and unspecified finger at wrist and hand level S66.39 - Other injury of extensor muscle, fascia and tendon of other and unspecified finger at wrist and hand level S66.390 - Other injury of extensor muscle, fascia and tendon of right index finger at wrist and hand level