ICD-10-CM > S00-T88 > S40-S49 > S46 > S46.9 > S46.99 > S46.999 S46.999 Other injury of unspecified muscle, fascia and tendon at shoulder and upper arm level, unspecified arm Non-Billable/Non-Specific Codes S46.999A..., initial encounterS46.999D..., subsequent encounterS46.999S..., sequela