ICD-10-CM > S00-T88 > S40-S49 > S46 > S46.3 > S46.39 S46.39 Other injury of muscle, fascia and tendon of triceps Non-Billable/Non-Specific Codes S46.391Other injury of muscle, fascia and tendon of triceps, right armS46.391A..., initial encounterS46.391D..., subsequent encounterS46.391S..., sequelaS46.392Other injury of muscle, fascia and tendon of triceps, left armS46.392A..., initial encounterS46.392D..., subsequent encounterS46.392S..., sequelaS46.399Other injury of muscle, fascia and tendon of triceps, unspecified armS46.399A..., initial encounterS46.399D..., subsequent encounterS46.399S..., sequela