ICD-10-CM > S00-T88 > S60-S69 > S66 > S66.3 > S66.39 > S66.393 S66.393 Other injury of extensor muscle, fascia and tendon of left middle finger at wrist and hand level Non-Billable/Non-Specific Codes S66.393A..., initial encounterS66.393D..., subsequent encounterS66.393S..., sequela