ICD-10-CM > S00-T88 > S50-S59 > S56 > S56.4 > S56.41 > S56.411 S56.411 Strain of extensor muscle, fascia and tendon of right index finger at forearm level Non-Billable/Non-Specific Codes S56.411A..., initial encounterS56.411D..., subsequent encounterS56.411S..., sequela