ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.3 > T23.39 > T23.399 T23.399 Burn of third degree of multiple sites of unspecified wrist and hand Non-Billable/Non-Specific Codes T23.399A..., initial encounterT23.399D..., subsequent encounterT23.399S..., sequela