O9A.1Malignant neoplasm complicating pregnancy, childbirth and the puerperium

O9A.1 is the ICD-10-CM diagnosis code for malignant neoplasm complicating pregnancy, childbirth and the puerperium. It belongs to category O9A (maternal malignant neoplasms, traumatic injuries and abuse classifiable elsewhere but complicating pregnancy, childbirth and the puerperium), block O94-O9A (other obstetric conditions, not elsewhere classified) and chapter 15 (pregnancy, childbirth and the puerperium). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within O9A (maternal malignant neoplasms, traumatic injuries and abuse classifiable elsewhere but complicating pregnancy, childbirth and the puerperium), O9A.1 is specifically for malignant neoplasm complicating pregnancy, childbirth and the puerperium. Related codes cover injury, poisoning and certain other consequences of external causes complicating pregnancy, childbirth and the puerperium (O9A.2), physical abuse complicating pregnancy, childbirth and the puerperium (O9A.3), sexual abuse complicating pregnancy, childbirth and the puerperium (O9A.4) and psychological abuse complicating pregnancy, childbirth and the puerperium (O9A.5).

To report this condition, pick the subcode that matches the documentation: O9A.11 (pregnancy), O9A.12 (childbirth) and O9A.13 (puerperium).

The conditions in its Excludes2 note aren't part of O9A.1, but may be coded alongside it if the patient has both: maternal care for benign tumor of corpus uteri (O34.1-) and maternal care for benign tumor of cervix (O34.4-).

Use an additional code to identify neoplasm.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.