Gestational edema, second trimester

This code identifies the presence of abnormal fluid retention (edema) specifically occurring during the second trimester of pregnancy. This condition is not accompanied by hypertension or proteinuria, distinguishing it from pre-eclampsia. It reflects a physiological change in pregnancy that requires monitoring.

Assign this code when documentation clearly indicates edema in a pregnant patient during her second trimester, and there is no mention of hypertension or proteinuria. Supporting documentation would include physician notes detailing the presence of edema and the gestational age at the time of diagnosis.

• Ensure the documentation specifies "second trimester" for accurate code assignment.
• Differentiate from O12.01 (first trimester) and O12.03 (third trimester) based on gestational age.
• Do not use if hypertension or proteinuria are also present; consider codes for pre-eclampsia (O14.-) or gestational hypertension (O13.-).