ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.5 > T23.56 T23.56 Corrosion of first degree of back of hand Non-Billable/Non-Specific Codes T23.561Corrosion of first degree of back of right handT23.561A..., initial encounterT23.561D..., subsequent encounterT23.561S..., sequelaT23.562Corrosion of first degree of back of left handT23.562A..., initial encounterT23.562D..., subsequent encounterT23.562S..., sequelaT23.569Corrosion of first degree of back of unspecified handT23.569A..., initial encounterT23.569D..., subsequent encounterT23.569S..., sequela