O12 - Gestational [pregnancy-induced] edema and proteinuria without hypertension
O12.0 - Gestational edema
O12.00 - Gestational edema, unspecified trimester
O12.01 - Gestational edema, first trimester
O12.02 - Gestational edema, second trimester
O12.03 - Gestational edema, third trimester