ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.6 > T23.66 > T23.662 T23.662 Corrosion of second degree back of left hand Non-Billable/Non-Specific Codes T23.662A..., initial encounterT23.662D..., subsequent encounterT23.662S..., sequela