ICD-10-CM > S00-T88 > T20-T25 > T23 > T23.5 > T23.50 > T23.501 T23.501 Corrosion of first degree of right hand, unspecified site Non-Billable/Non-Specific Codes T23.501A..., initial encounterT23.501D..., subsequent encounterT23.501S..., sequela