ICD-10-CM > S00-T88 > S40-S49 > S46 > S46.9 > S46.91 > S46.912 S46.912 Strain of unspecified muscle, fascia and tendon at shoulder and upper arm level, left arm Non-Billable/Non-Specific Codes S46.912A..., initial encounterS46.912D..., subsequent encounterS46.912S..., sequela