ICD-10-CM > S00-T88 > S40-S49 > S46 > S46.3 > S46.31 > S46.312 S46.312 Strain of muscle, fascia and tendon of triceps, left arm Non-Billable/Non-Specific Codes S46.312A..., initial encounterS46.312D..., subsequent encounterS46.312S..., sequela