ICD-10-CM > S00-T88 > S50-S59 > S56 > S56.4 > S56.41 > S56.414 S56.414 Strain of extensor muscle, fascia and tendon of left middle finger at forearm level Non-Billable/Non-Specific Codes S56.414A..., initial encounterS56.414D..., subsequent encounterS56.414S..., sequela