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ICD-10 Guide
ICD-10 CodesO11.5

O11.5

Billable

Pre-existing hypertension with pre-eclampsia, complicating the puerperium

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

Code Description

ICD-10 O11.5 is a billable code used to indicate a diagnosis of pre-existing hypertension with pre-eclampsia, complicating the puerperium.

Key Diagnostic Point:

Pre-existing hypertension with superimposed pre-eclampsia is a serious condition that can arise during pregnancy and extend into the puerperium, which is the period following childbirth. This condition is characterized by the presence of chronic hypertension prior to pregnancy, which is exacerbated by the development of pre-eclampsia, a pregnancy-specific hypertensive disorder. Clinically, this may manifest as elevated blood pressure readings, proteinuria, and potential end-organ dysfunction. The management of this condition is complex and requires careful monitoring of both maternal and fetal health. Treatment may involve antihypertensive medications, close surveillance for signs of worsening pre-eclampsia, and potentially early delivery if maternal or fetal health is at risk. The puerperium presents additional challenges, as the body undergoes significant physiological changes, and the risk of complications such as postpartum hemorrhage or eclampsia remains heightened. Effective communication among the healthcare team and thorough documentation are essential to ensure optimal care and accurate coding.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Differentiating between pre-existing hypertension and gestational hypertension.
  • Identifying the severity of pre-eclampsia and its impact on management.
  • Monitoring for complications during the puerperium.
  • Need for interdisciplinary collaboration in management.

Audit Risk Factors

  • Inadequate documentation of hypertension history.
  • Failure to document the severity of pre-eclampsia.
  • Lack of clear treatment plans and follow-up.
  • Inconsistent blood pressure readings not documented.

Specialty Focus

Medical Specialties

Obstetrics and Gynecology

Documentation Requirements

Detailed history of hypertension, current blood pressure readings, and treatment plans.

Common Clinical Scenarios

Management of a patient with chronic hypertension who develops pre-eclampsia during pregnancy.

Billing Considerations

Ensure all relevant clinical findings are documented, including lab results and fetal monitoring.

Maternal-Fetal Medicine

Documentation Requirements

Comprehensive risk assessment and management plans for high-risk pregnancies.

Common Clinical Scenarios

Monitoring and managing a patient with pre-existing hypertension and pre-eclampsia.

Billing Considerations

Focus on the potential for maternal and fetal complications and the need for specialized care.

Coding Guidelines

Inclusion Criteria

Use O11.5 When
  • Follow official ICD
  • 10 coding guidelines, ensuring accurate documentation of both pre
  • existing hypertension and the development of pre
  • eclampsia
  • Include details on the management and any complications that arise during the puerperium

Exclusion Criteria

Do NOT use O11.5 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

99233CPT Code

Subsequent hospital care, typically 15-29 minutes

Clinical Scenario

Used for follow-up visits in the hospital for a patient with pre-existing hypertension and pre-eclampsia.

Documentation Requirements

Document the patient's blood pressure, symptoms, and treatment response.

Specialty Considerations

Ensure that the visit reflects the complexity of managing a high-risk obstetric patient.

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, improving the ability to capture the complexity of cases like O11.5. This specificity aids in better tracking of outcomes and resource allocation.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of obstetric conditions, improving the ability to capture the complexity of cases like O11.5. This specificity aids in better tracking of outcomes and resource allocation.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of obstetric conditions, improving the ability to capture the complexity of cases like O11.5. This specificity aids in better tracking of outcomes and resource allocation.

Resources

Clinical References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Coding & Billing References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Frequently Asked Questions

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

Pre-existing hypertension is diagnosed before pregnancy, while gestational hypertension develops after 20 weeks of gestation. Accurate documentation is crucial for proper coding.