ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.4 > T23.46 > T23.462 T23.462 Corrosion of unspecified degree of back of left hand Non-Billable/Non-Specific Codes T23.462A..., initial encounterT23.462D..., subsequent encounterT23.462S..., sequela