O11: Pre-existing hypertension with pre-eclampsia

O11 refers to Pre-existing hypertension with pre-eclampsia, covering various hypertensive and fluid retention complications during pregnancy, ranging from mild gestational hypertension to severe pre-eclampsia and eclampsia, all requiring vigilant monitoring and intervention.

Symptoms

• Elevated blood pressure – Seen in pre-existing (O10, O11) or gestational hypertension (O13)
• Proteinuria – A hallmark of pre-eclampsia (O14)
• Generalized swelling (edema) – Especially with gestational edema and proteinuria (O12)
• Seizures – Defining feature of eclampsia (O15)
• Visual disturbances or severe headaches – Warning signs of worsening hypertensive disorders

Diagnosis

Diagnosis of Pre-existing hypertension with pre-eclampsia involves regular blood pressure monitoring, urinalysis for proteinuria, assessment of symptoms like headaches and vision changes, fetal surveillance (ultrasound, non-stress testing), and laboratory evaluations (renal function, liver enzymes, platelet counts).

ICD10 Code Usage

ICD10 code O11 is used by obstetricians, maternal-fetal medicine specialists, midwives, and primary care providers to document and manage hypertensive and high-risk pregnancy conditions requiring close supervision to prevent maternal and fetal complications.

Related Codes

• O09 – Supervision of high risk pregnancy
• O10 – Pre-existing hypertension complicating pregnancy, childbirth and the puerperium
• O12 – Gestational edema and proteinuria without hypertension
• O13 – Gestational hypertension without significant proteinuria
• O14 – Pre-eclampsia
• O15 – Eclampsia
• O16 – Unspecified maternal hypertension

FAQs

Q1: What is ICD10 code O11?
A: It refers to Pre-existing hypertension with pre-eclampsia, documenting hypertensive disorders and high-risk pregnancy situations requiring enhanced maternal care and monitoring.

Q2: What differentiates gestational hypertension (O13) from pre-eclampsia (O14)?
A: Gestational hypertension occurs without proteinuria, while pre-eclampsia involves hypertension plus proteinuria or organ dysfunction.

Q3: What is eclampsia (O15)?
A: Eclampsia is the onset of seizures in a woman with pre-eclampsia, representing a life-threatening obstetric emergency.

Q4: How is high-risk pregnancy (O09) managed?
A: Through frequent prenatal visits, ultrasounds, lab monitoring, blood pressure control, and early delivery planning if complications arise.

Q5: How serious is maternal hypertension during pregnancy?
A: If uncontrolled, it can lead to preterm birth, placental abruption, fetal growth restriction, or maternal organ failure.

Conclusion

ICD10 code O11 ensures thorough documentation and proactive management of Pre-existing hypertension with pre-eclampsia, protecting both maternal and fetal health through early detection, close monitoring, and appropriate obstetric interventions.