ICD-10-CM > S00-T88 > S50-S59 > S56 > S56.1 > S56.19 > S56.199 S56.199 Other injury of flexor muscle, fascia and tendon of unspecified finger at forearm level Non-Billable/Non-Specific Codes S56.199A..., initial encounterS56.199D..., subsequent encounterS56.199S..., sequela