ICD-10-CM > S00-T88 > S60-S69 > S66 > S66.3 > S66.39 > S66.394 S66.394 Other injury of extensor muscle, fascia and tendon of right ring finger at wrist and hand level Non-Billable/Non-Specific Codes S66.394A..., initial encounterS66.394D..., subsequent encounterS66.394S..., sequela