ICD-10-CM > S00-T88 > S60-S69 > S66 > S66.5 > S66.51 > S66.510 S66.510 Strain of intrinsic muscle, fascia and tendon of right index finger at wrist and hand level Non-Billable/Non-Specific Codes S66.510A..., initial encounterS66.510D..., subsequent encounterS66.510S..., sequela