ICD-10-CM > S00-T88 > S40-S49 > S46 > S46.9 > S46.99 > S46.991 S46.991 Other injury of unspecified muscle, fascia and tendon at shoulder and upper arm level, right arm Non-Billable/Non-Specific Codes S46.991A..., initial encounterS46.991D..., subsequent encounterS46.991S..., sequela