ICD-10-CM > S00-T88 > S50-S59 > S56 > S56.9 > S56.90 > S56.901 S56.901 Unspecified injury of unspecified muscles, fascia and tendons at forearm level, right arm Non-Billable/Non-Specific Codes S56.901A..., initial encounterS56.901D..., subsequent encounterS56.901S..., sequela