ICD-10-CM > S00-T88 > S50-S59 > S56 > S56.8 > S56.89 > S56.891 S56.891 Other injury of other muscles, fascia and tendons at forearm level, right arm Non-Billable/Non-Specific Codes S56.891A..., initial encounterS56.891D..., subsequent encounterS56.891S..., sequela