Severe pre-eclampsia, third trimester

This code signifies a severe form of pre-eclampsia, a pregnancy-specific hypertensive disorder, occurring during the third trimester. It is characterized by new-onset hypertension and proteinuria, often accompanied by signs of organ dysfunction such as renal insufficiency, liver involvement, neurological symptoms, or hematological complications. This condition poses significant risks to both the mother and the fetus.

Use this code when documentation clearly indicates a diagnosis of severe pre-eclampsia and the patient is in her third trimester of pregnancy. Supporting documentation should detail the diagnostic criteria for severe pre-eclampsia, including blood pressure readings, proteinuria levels, and any associated organ system involvement. This code is appropriate for inpatient and outpatient encounters where this diagnosis is established or managed.

• Always confirm the trimester of pregnancy from the medical record; do not assume.
• Distinguish carefully from gestational hypertension or pre-eclampsia without severe features (O14.0-).
• Code any associated complications, such as HELLP syndrome (O14.2-) or eclampsia (O15.-), in addition to this code.