ICD-10-CM > S00-T88 > S50-S59 > S56 > S56.2 > S56.29 S56.29 Other injury of other flexor muscle, fascia and tendon at forearm level Non-Billable/Non-Specific Codes S56.291Other injury of other flexor muscle, fascia and tendon at forearm level, right armS56.291A..., initial encounterS56.291D..., subsequent encounterS56.291S..., sequelaS56.292Other injury of other flexor muscle, fascia and tendon at forearm level, left armS56.292A..., initial encounterS56.292D..., subsequent encounterS56.292S..., sequelaS56.299Other injury of other flexor muscle, fascia and tendon at forearm level, unspecified armS56.299A..., initial encounterS56.299D..., subsequent encounterS56.299S..., sequela