ICD-10-CM > S00-T88 > S50-S59 > S56 > S56.4 > S56.49 > S56.492 S56.492 Other injury of extensor muscle, fascia and tendon of left index finger at forearm level Non-Billable/Non-Specific Codes S56.492A..., initial encounterS56.492D..., subsequent encounterS56.492S..., sequela