ICD-10-CM > S00-T88 > S50-S59 > S56 > S56.5 > S56.52 > S56.521 S56.521 Laceration of other extensor muscle, fascia and tendon at forearm level, right arm Non-Billable/Non-Specific Codes S56.521A..., initial encounterS56.521D..., subsequent encounterS56.521S..., sequela