ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.5 > T23.50 > T23.502 T23.502 Corrosion of first degree of left hand, unspecified site Non-Billable/Non-Specific Codes T23.502A..., initial encounterT23.502D..., subsequent encounterT23.502S..., sequela