ICD-10-CM > S00-T88 > S50-S59 > S56 > S56.4 > S56.41 > S56.417 S56.417 Strain of extensor muscle, fascia and tendon of right little finger at forearm level Non-Billable/Non-Specific Codes S56.417A..., initial encounterS56.417D..., subsequent encounterS56.417S..., sequela