ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.3 > T23.30 > T23.309 T23.309 Burn of third degree of unspecified hand, unspecified site Non-Billable/Non-Specific Codes T23.309A..., initial encounterT23.309D..., subsequent encounterT23.309S..., sequela