ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.4 > T23.46 T23.46 Corrosion of unspecified degree of back of hand Non-Billable/Non-Specific Codes T23.461Corrosion of unspecified degree of back of right handT23.461A..., initial encounterT23.461D..., subsequent encounterT23.461S..., sequelaT23.462Corrosion of unspecified degree of back of left handT23.462A..., initial encounterT23.462D..., subsequent encounterT23.462S..., sequelaT23.469Corrosion of unspecified degree of back of unspecified handT23.469A..., initial encounterT23.469D..., subsequent encounterT23.469S..., sequela