ICD-10-CM > S00-T88 > T20-T25 > T21 > T21.4 > T21.42 > T21.42XD T21.42XD Corrosion of unspecified degree of abdominal wall, subsequent encounter Billable/Specific Copy Code Copy Description Applicable To Corrosion of unspecified degree of flankCorrosion of unspecified degree of groin