ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.6 > T23.60 > T23.609 T23.609 Corrosion of second degree of unspecified hand, unspecified site Non-Billable/Non-Specific Codes T23.609A..., initial encounterT23.609D..., subsequent encounterT23.609S..., sequela