ICD-10-CM > S00-T88 > S50-S59 > S56 > S56.4 > S56.42 > S56.423 S56.423 Laceration of extensor muscle, fascia and tendon of right middle finger at forearm level Non-Billable/Non-Specific Codes S56.423A..., initial encounterS56.423D..., subsequent encounterS56.423S..., sequela