ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.7 > T23.79 > T23.799 T23.799 Corrosion of third degree of multiple sites of unspecified wrist and hand Non-Billable/Non-Specific Codes T23.799A..., initial encounterT23.799D..., subsequent encounterT23.799S..., sequela