ICD-10-CM > S00-T88 > S40-S49 > S46 > S46.9 > S46.91 S46.91 Strain of unspecified muscle, fascia and tendon at shoulder and upper arm level Non-Billable/Non-Specific Codes S46.911Strain of unspecified muscle, fascia and tendon at shoulder and upper arm level, right armS46.911A..., initial encounterS46.911D..., subsequent encounterS46.911S..., sequelaS46.912Strain of unspecified muscle, fascia and tendon at shoulder and upper arm level, left armS46.912A..., initial encounterS46.912D..., subsequent encounterS46.912S..., sequelaS46.919Strain of unspecified muscle, fascia and tendon at shoulder and upper arm level, unspecified armS46.919A..., initial encounterS46.919D..., subsequent encounterS46.919S..., sequela