ICD-10-CM > S00-T88 > S50-S59 > S56 > S56.4 > S56.42 S56.42 Laceration of extensor muscle, fascia and tendon of other and unspecified finger at forearm level Non-Billable/Non-Specific Codes S56.421Laceration of extensor muscle, fascia and tendon of right index finger at forearm levelS56.421A..., initial encounterS56.421D..., subsequent encounterS56.421S..., sequelaS56.422Laceration of extensor muscle, fascia and tendon of left index finger at forearm levelS56.422A..., initial encounterS56.422D..., subsequent encounterS56.422S..., sequelaS56.423Laceration of extensor muscle, fascia and tendon of right middle finger at forearm levelS56.423A..., initial encounterS56.423D..., subsequent encounterS56.423S..., sequelaS56.424Laceration of extensor muscle, fascia and tendon of left middle finger at forearm levelS56.424A..., initial encounterS56.424D..., subsequent encounterS56.424S..., sequelaS56.425Laceration of extensor muscle, fascia and tendon of right ring finger at forearm levelS56.425A..., initial encounterS56.425D..., subsequent encounterS56.425S..., sequelaS56.426Laceration of extensor muscle, fascia and tendon of left ring finger at forearm levelS56.426A..., initial encounterS56.426D..., subsequent encounterS56.426S..., sequelaS56.427Laceration of extensor muscle, fascia and tendon of right little finger at forearm levelS56.427A..., initial encounterS56.427D..., subsequent encounterS56.427S..., sequelaS56.428Laceration of extensor muscle, fascia and tendon of left little finger at forearm levelS56.428A..., initial encounterS56.428D..., subsequent encounterS56.428S..., sequelaS56.429Laceration of extensor muscle, fascia and tendon of unspecified finger at forearm levelS56.429A..., initial encounterS56.429D..., subsequent encounterS56.429S..., sequela