ICD-10-CM > S00-T88 > T20-T25 > T22 > T22.3 > T22.33 > T22.339 T22.339 Burn of third degree of unspecified upper arm Non-Billable/Non-Specific Codes T22.339A..., initial encounterT22.339D..., subsequent encounterT22.339S..., sequela