O99.34Other mental disorders complicating pregnancy, childbirth, and the puerperium

O99.34 is the ICD-10-CM diagnosis code for other mental disorders complicating pregnancy, childbirth, and the puerperium. It belongs to category O99 (other maternal diseases 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 6 subcodes must be used instead.

Within O99.3, choose O99.34 (Other mental disorders complicating pregnancy, childbirth, and the puerperium) only when documentation doesn't support a more specific option: alcohol use complicating pregnancy, childbirth, and the puerperium (O99.31), drug use complicating pregnancy, childbirth, and the puerperium (O99.32), tobacco use disorder complicating pregnancy, childbirth, and the puerperium (O99.33) and diseases of the nervous system complicating pregnancy, childbirth, and the puerperium (O99.35).

To report this condition, pick the subcode that matches the documentation: O99.340 (trimester), O99.341 (trimester), O99.342 (trimester), O99.343 (trimester), O99.344 (childbirth) and O99.345 (puerperium).

The conditions in its Excludes2 note aren't part of O99.34, but may be coded alongside it if the patient has both: postpartum mood disturbance (O90.6), postnatal psychosis (F53.1) and puerperal psychosis (F53.1).

Use an additional code to identify specific condition.

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