ICD-10-CM > S00-T88 > S60-S69 > S66 > S66.1 > S66.11 > S66.110 S66.110 Strain of flexor muscle, fascia and tendon of right index finger at wrist and hand level Non-Billable/Non-Specific Codes S66.110A..., initial encounterS66.110D..., subsequent encounterS66.110S..., sequela