ICD-10-CM > S00-T88 > S60-S69 > S66 > S66.5 > S66.51 > S66.513 S66.513 Strain of intrinsic muscle, fascia and tendon of left middle finger at wrist and hand level Non-Billable/Non-Specific Codes S66.513A..., initial encounterS66.513D..., subsequent encounterS66.513S..., sequela