C58 vs D39.2
C58 and D39.2 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
chorioadenoma (destruens) (D39.2)
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)
D39.2
Neoplasm of uncertain behavior of placenta
Billable
- Chapter 2
- Neoplasms
- Section
- D37-D48
Use when the record says
- Chorioadenoma destruens
- Invasive hydatidiform mole
- Malignant hydatidiform mole
Indexed under
- Chorioadenoma (destruens)
- Mola destruens
- Hydatidiform mole › invasive (benign) (complicating pregnancy) (delivered) (undelivered)
- Hydatidiform mole › malignant (benign) (complicating pregnancy) (delivered) (undelivered)
- Mole › destructive (pigmented)
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