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