ICD-10-CM > S00-T88 > T20-T25 > T20 > T20.6 > T20.65 T20.65 Corrosion of second degree of scalp [any part] Non-Billable/Non-Specific Codes T20.65XA..., initial encounterT20.65XD..., subsequent encounterT20.65XS..., sequela