ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.5 > T23.59 > T23.599 T23.599 Corrosion of first degree of multiple sites of unspecified wrist and hand Non-Billable/Non-Specific Codes T23.599A..., initial encounterT23.599D..., subsequent encounterT23.599S..., sequela