O12.0Gestational edema

O12.0 is the ICD-10-CM diagnosis code for gestational edema. It belongs to category O12 (gestational [pregnancy-induced] edema and proteinuria without hypertension), block O10-O16 (edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium) 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 O12 (gestational [pregnancy-induced] edema and proteinuria without hypertension), O12.0 is specifically for gestational edema. Related codes cover proteinuria (O12.1) and edema with proteinuria (O12.2).

To report this condition, pick the subcode that matches the documentation: O12.00 (unspecified trimester), O12.01 (first trimester), O12.02 (second trimester), O12.03 (third trimester), O12.04 (complicating childbirth) and O12.05 (complicating the puerperium).

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