ICD-10-CM > S00-T88 > S60-S69 > S66 > S66.5 > S66.59 > S66.593 S66.593 Other injury of intrinsic muscle, fascia and tendon of left middle finger at wrist and hand level Non-Billable/Non-Specific Codes S66.593A..., initial encounterS66.593D..., subsequent encounterS66.593S..., sequela