ICD-10-CM > S00-T88 > S50-S59 > S56 > S56.8 > S56.81 > S56.812 S56.812 Strain of other muscles, fascia and tendons at forearm level, left arm Non-Billable/Non-Specific Codes S56.812A..., initial encounterS56.812D..., subsequent encounterS56.812S..., sequela