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ICD-10 Guide
ICD-10 CodesO11.4

O11.4

Billable

Pre-existing hypertension with pre-eclampsia, complicating childbirth

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/08/2025

Code Description

ICD-10 O11.4 is a billable code used to indicate a diagnosis of pre-existing hypertension with pre-eclampsia, complicating childbirth.

Key Diagnostic Point:

Pre-existing hypertension with superimposed pre-eclampsia is a significant obstetric condition that complicates pregnancy and childbirth. This condition occurs when a woman with chronic hypertension develops new-onset hypertension and proteinuria after 20 weeks of gestation. The presence of pre-eclampsia can lead to severe maternal and fetal complications, including placental abruption, fetal growth restriction, and increased risk of cesarean delivery. Management of this condition requires careful monitoring of blood pressure, regular assessment of fetal well-being, and potential pharmacological intervention to control hypertension. In severe cases, early delivery may be indicated to prevent further complications. The complexity of managing pre-existing hypertension with pre-eclampsia necessitates a multidisciplinary approach, often involving obstetricians, maternal-fetal medicine specialists, and nursing staff to ensure optimal outcomes for both mother and child.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Differentiating between chronic hypertension and gestational hypertension.
  • Monitoring for signs of severe pre-eclampsia, such as elevated liver enzymes or low platelet counts.
  • Managing medication adjustments for antihypertensive therapy during pregnancy.
  • Coordinating care among multiple specialties, including obstetrics and maternal-fetal medicine.

Audit Risk Factors

  • Inadequate documentation of blood pressure readings and treatment plans.
  • Failure to document the onset of proteinuria or other signs of pre-eclampsia.
  • Misclassification of hypertension type (chronic vs. gestational).
  • Lack of clear communication regarding the management plan and follow-up.

Specialty Focus

Medical Specialties

Obstetrics and Gynecology

Documentation Requirements

Detailed documentation of maternal blood pressure readings, medication adjustments, and fetal monitoring results.

Common Clinical Scenarios

Management of a pregnant patient with a history of hypertension who presents with elevated blood pressure and proteinuria.

Billing Considerations

Ensure that all relevant clinical findings are documented to support the diagnosis of O11.4.

Maternal-Fetal Medicine

Documentation Requirements

Comprehensive records of high-risk assessments, including ultrasound findings and laboratory results.

Common Clinical Scenarios

Consultation for a patient with pre-existing hypertension who develops severe pre-eclampsia requiring hospitalization.

Billing Considerations

Focus on the multidisciplinary approach to managing high-risk pregnancies and the need for detailed documentation of interventions.

Coding Guidelines

Inclusion Criteria

Use O11.4 When
  • According to ICD
  • 10 coding guidelines, O11
  • 4 should be used when a patient with pre
  • existing hypertension develops pre
  • eclampsia during pregnancy
  • Coders must ensure that the documentation clearly indicates the timeline of hypertension and the onset of pre
  • eclampsia, as well as any complications that arise

Exclusion Criteria

Do NOT use O11.4 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

59400CPT Code

Obstetrical care including antepartum care, delivery, and postpartum care

Clinical Scenario

Used for comprehensive care of a patient with O11.4 throughout pregnancy and delivery.

Documentation Requirements

Complete documentation of all visits, assessments, and interventions related to the patient's hypertension and pre-eclampsia.

Specialty Considerations

Obstetricians should ensure that all aspects of care are documented to support the complexity of the case.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of obstetric conditions, including O11.4, which provides better data for tracking maternal health outcomes and improving care protocols.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of obstetric conditions, including O11.4, which provides better data for tracking maternal health outcomes and improving care protocols.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of obstetric conditions, including O11.4, which provides better data for tracking maternal health outcomes and improving care protocols.

Resources

Clinical References

  • •
    American College of Obstetricians and Gynecologists (ACOG)

Coding & Billing References

  • •
    American College of Obstetricians and Gynecologists (ACOG)

Frequently Asked Questions

What is the difference between pre-existing hypertension and gestational hypertension?

Pre-existing hypertension is diagnosed before pregnancy or before 20 weeks of gestation, while gestational hypertension occurs after 20 weeks without prior history. Accurate documentation is crucial for proper coding.