ICD-10-CM > S00-T88 > S60-S69 > S66 > S66.5 > S66.51 > S66.511 S66.511 Strain of intrinsic muscle, fascia and tendon of left index finger at wrist and hand level Non-Billable/Non-Specific Codes S66.511A..., initial encounterS66.511D..., subsequent encounterS66.511S..., sequela