ICD-10-CM > S00-T88 > S40-S49 > S44 > S44.9 > S44.91 S44.91 Injury of unspecified nerve at shoulder and upper arm level, right arm Non-Billable/Non-Specific Codes S44.91XA..., initial encounterS44.91XD..., subsequent encounterS44.91XS..., sequela