ICD-10-CM > S00-T88 > S50-S59 > S56 > S56.4 > S56.41 > S56.416 S56.416 Strain of extensor muscle, fascia and tendon of left ring finger at forearm level Non-Billable/Non-Specific Codes S56.416A..., initial encounterS56.416D..., subsequent encounterS56.416S..., sequela