ICD-10-CM > O00-O9A > O10-O16 > O12 > O12.0 O12.0 Gestational edema Non-Billable/Non-Specific Codes O12.00Gestational edema, unspecified trimesterO12.01Gestational edema, first trimesterO12.02Gestational edema, second trimesterO12.03Gestational edema, third trimesterO12.04Gestational edema, complicating childbirthO12.05Gestational edema, complicating the puerperium