O9AMaternal malignant neoplasms, traumatic injuries and abuse classifiable elsewhere but complicating pregnancy, childbirth and the puerperium

O9A is the ICD-10-CM diagnosis code for maternal malignant neoplasms, traumatic injuries and abuse classifiable elsewhere but complicating pregnancy, childbirth and the puerperium. It belongs to 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 5 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: O9A.1 (puerperium), O9A.2 (puerperium), O9A.3 (puerperium), O9A.4 (puerperium) and O9A.5 (puerperium).

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