ICD-10-CM > S00-T88 > S50-S59 > S56 > S56.1 > S56.11 > S56.113 S56.113 Strain of flexor muscle, fascia and tendon of right middle finger at forearm level Non-Billable/Non-Specific Codes S56.113A..., initial encounterS56.113D..., subsequent encounterS56.113S..., sequela