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