ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.4 > T23.46 > T23.461 T23.461 Corrosion of unspecified degree of back of right hand Non-Billable/Non-Specific Codes T23.461A..., initial encounterT23.461D..., subsequent encounterT23.461S..., sequela