Excludes1 pair

C63.9 vs C76-

C63.9 and C76 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.

The official note, declared on C76
malignant neoplasm of male genitourinary tract NOS (C63.9)
C63.9

Malignant neoplasm of male genital organ, unspecified

BillableUnspecified
Chapter 2
Neoplasms
Section
C60-C63
Use when the record says
  • Malignant neoplasm of male genitourinary tract NOS
Indexed under
  • Melanoma › skin › male genital organ NEC (external)
C76

Malignant neoplasm of other and ill-defined sites

Not billable
Chapter 2
Neoplasms
Section
C76-C80

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