Excludes1 pair
C58 vs C62-
C58 and C62 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 C58
male choriocarcinoma NOS (C62.9-)
C58
Malignant neoplasm of placenta
Billable
- Chapter 2
- Neoplasms
- Section
- C51-C58
Use when the record says
- choriocarcinoma NOS
- chorionepithelioma NOS
Indexed under
- Choriocarcinoma › unspecified site › female
- Carcinoma › chorionic › unspecified site › female
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