Mild to moderate pre-eclampsia, unspecified trimester

This code describes a diagnosis of pre-eclampsia that is classified as mild to moderate in severity, without specification of the trimester in which it occurred. Pre-eclampsia is a pregnancy-specific condition characterized by new-onset hypertension and proteinuria after 20 weeks of gestation.

Use this code when the provider documents "mild pre-eclampsia" or "moderate pre-eclampsia" but does not specify the trimester of pregnancy. This code is appropriate when the documentation indicates the severity but lacks the specific gestational period for a more precise code.

• Avoid using this code if the trimester is documented; instead, select the more specific code (O14.02 or O14.03).
• Ensure documentation clearly states "mild" or "moderate" pre-eclampsia.
• Always sequence this code as a primary diagnosis when it is the reason for the encounter, or as a secondary diagnosis when it is a co-morbidity affecting the pregnancy.