ICD-10-CM
T21.66: Corrosion of second degree of male genital region
A header, not a billable code. Bill a more specific code under it.
Source: CDC ICD-10-CM FY2027 order file dated June 16, 2026. Publisher page
- Kind
- Header. Not a billable code.
- Category
- T21
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Nearby codes
A header groups codes and is not billed. A billable code is one you can report.
- T21.60Corrosion of second degree of trunk, unspecified siteHeader
- T21.61Corrosion of second degree of chest wallHeader
- T21.62Corrosion of second degree of abdominal wallHeader
- T21.63Corrosion of second degree of upper backHeader
- T21.64Corrosion of second degree of lower backHeader
- T21.65Corrosion of second degree of buttockHeader
- T21.67Corrosion of second degree of female genital regionHeader
- T21.69Corrosion of second degree of other site of trunkHeader
It's the public CDC file. Check the current ICD-10-CM guidelines before you code.
Code first
The CDC tabular list says to report the code named here before this one.
From T21.6. A note on a category applies to every code under it.
Code first (T51-T65) to identify chemical and intent
Use additional code
The CDC tabular list says to add the code named here after this one when it applies.
From T21.6. A note on a category applies to every code under it.
Use additional external cause code to identify place (Y92)
Excludes2
Excludes2 means the other condition can be reported with this one when both are documented.
From T21. A note on a category applies to every code under it.