ICD-10-CM > S00-T88 > S50-S59 > S56 > S56.0 > S56.00 > S56.001 S56.001 Unspecified injury of flexor muscle, fascia and tendon of right thumb at forearm level Non-Billable/Non-Specific Codes S56.001A..., initial encounterS56.001D..., subsequent encounterS56.001S..., sequela