ICD-10-CM > S00-T88 > S40-S49 > S40 > S40.2 > S40.22 S40.22 Blister (nonthermal) of shoulder Non-Billable/Non-Specific Codes S40.221Blister (nonthermal) of right shoulderS40.221A..., initial encounterS40.221D..., subsequent encounterS40.221S..., sequelaS40.222Blister (nonthermal) of left shoulderS40.222A..., initial encounterS40.222D..., subsequent encounterS40.222S..., sequelaS40.229Blister (nonthermal) of unspecified shoulderS40.229A..., initial encounterS40.229D..., subsequent encounterS40.229S..., sequela