ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.5 > T23.55 > T23.559 T23.559 Corrosion of first degree of unspecified palm Non-Billable/Non-Specific Codes T23.559A..., initial encounterT23.559D..., subsequent encounterT23.559S..., sequela