ICD-10-CM > S00-T88 > T20-T25 > T21 > T21.6 > T21.66 T21.66 Corrosion of second degree of male genital region Non-Billable/Non-Specific Applicable To Corrosion of second degree of penisCorrosion of second degree of scrotumCorrosion of second degree of testis Codes T21.66XA..., initial encounterT21.66XD..., subsequent encounterT21.66XS..., sequela