Excludes1 pair
C44- vs C63.2
C44 and C63.2 are not coded together. ICD-10-CM declares them mutually exclusive with an Excludes1 note — the two conditions are not expected to occur together, so exactly one of them is normally correct for a given encounter. The Official Guidelines carve out one exception: if the two conditions are clearly unrelated to each other, both may be reported.
C44
Other and unspecified malignant neoplasm of skin
Not billable
- Chapter 2
- Neoplasms
- Section
- C43-C44
Use when the record says
- malignant neoplasm of sebaceous glands
- malignant neoplasm of sweat glands
C63.2
Malignant neoplasm of scrotum
Billable
- Chapter 2
- Neoplasms
- Section
- C60-C63
Use when the record says
- Malignant neoplasm of skin of scrotum
Indexed under
- Melanoma › skin › scrotum
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027