ICD-10-CM > S00-T88 > S50-S59 > S56 > S56.4 > S56.40 S56.40 Unspecified injury of extensor muscle, fascia and tendon of other and unspecified finger at forearm level Non-Billable/Non-Specific Codes S56.401Unspecified injury of extensor muscle, fascia and tendon of right index finger at forearm levelS56.401A..., initial encounterS56.401D..., subsequent encounterS56.401S..., sequelaS56.402Unspecified injury of extensor muscle, fascia and tendon of left index finger at forearm levelS56.402A..., initial encounterS56.402D..., subsequent encounterS56.402S..., sequelaS56.403Unspecified injury of extensor muscle, fascia and tendon of right middle finger at forearm levelS56.403A..., initial encounterS56.403D..., subsequent encounterS56.403S..., sequelaS56.404Unspecified injury of extensor muscle, fascia and tendon of left middle finger at forearm levelS56.404A..., initial encounterS56.404D..., subsequent encounterS56.404S..., sequelaS56.405Unspecified injury of extensor muscle, fascia and tendon of right ring finger at forearm levelS56.405A..., initial encounterS56.405D..., subsequent encounterS56.405S..., sequelaS56.406Unspecified injury of extensor muscle, fascia and tendon of left ring finger at forearm levelS56.406A..., initial encounterS56.406D..., subsequent encounterS56.406S..., sequelaS56.407Unspecified injury of extensor muscle, fascia and tendon of right little finger at forearm levelS56.407A..., initial encounterS56.407D..., subsequent encounterS56.407S..., sequelaS56.408Unspecified injury of extensor muscle, fascia and tendon of left little finger at forearm levelS56.408A..., initial encounterS56.408D..., subsequent encounterS56.408S..., sequelaS56.409Unspecified injury of extensor muscle, fascia and tendon of unspecified finger at forearm levelS56.409A..., initial encounterS56.409D..., subsequent encounterS56.409S..., sequela