ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.4 > T23.40 > T23.401 T23.401 Corrosion of unspecified degree of right hand, unspecified site Non-Billable/Non-Specific Codes T23.401A..., initial encounterT23.401D..., subsequent encounterT23.401S..., sequela