C58 vs C62
C58 and C62 can never be reported together. ICD-10-CM declares them mutually exclusive with an Excludes1 note, meaning the two conditions cannot occur in the same patient — so exactly one of them is correct for any given encounter.
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 (malignant)
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