S56.492 - Other injury of extensor muscle, fascia and tendon of left index finger at forearm level S56.4 - Injury of extensor muscle, fascia and tendon of other and unspecified finger at forearm level S56.49 - Other injury of extensor muscle, fascia and tendon of other and unspecified finger at forearm level S56.492 - Other injury of extensor muscle, fascia and tendon of left index finger at forearm level