ICD-10-CM > S00-T88 > S50-S59 > S56 > S56.2 > S56.29 > S56.299 S56.299 Other injury of other flexor muscle, fascia and tendon at forearm level, unspecified arm Non-Billable/Non-Specific Codes S56.299A..., initial encounterS56.299D..., subsequent encounterS56.299S..., sequela