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ICD-10 Guide
ICD-10 CodesO11.2

O11.2

Billable

Pre-existing hypertension with pre-eclampsia, second trimester

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

Code Description

ICD-10 O11.2 is a billable code used to indicate a diagnosis of pre-existing hypertension with pre-eclampsia, second trimester.

Key Diagnostic Point:

Pre-existing hypertension with superimposed pre-eclampsia is a serious condition that occurs when a woman with chronic hypertension develops new-onset proteinuria and/or hypertension after 20 weeks of gestation. This condition is particularly concerning during the second trimester, as it can lead to significant maternal and fetal complications. The management of this condition requires careful monitoring of blood pressure, urine protein levels, and fetal well-being. Treatment may include lifestyle modifications, antihypertensive medications, and close surveillance for signs of worsening pre-eclampsia, such as severe headaches, visual disturbances, or abdominal pain. The goal is to prevent progression to severe pre-eclampsia or eclampsia, which can have life-threatening consequences for both mother and baby. Regular follow-up visits and possibly hospitalization may be necessary to ensure optimal outcomes.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Differentiating between pre-existing hypertension and gestational hypertension.
  • Identifying the onset of proteinuria and its implications.
  • Monitoring and managing escalating blood pressure levels.
  • Understanding the implications of superimposed pre-eclampsia on delivery planning.

Audit Risk Factors

  • Inadequate documentation of blood pressure readings.
  • Failure to document the onset of proteinuria.
  • Lack of clear treatment plans or follow-up notes.
  • Inconsistent coding of hypertension types.

Specialty Focus

Medical Specialties

Obstetrics and Gynecology

Documentation Requirements

Detailed records of blood pressure measurements, proteinuria tests, and any symptoms experienced by the patient.

Common Clinical Scenarios

Management of a patient with chronic hypertension who presents with elevated blood pressure readings and proteinuria during routine prenatal visits.

Billing Considerations

Ensure that all relevant clinical findings are documented to support the diagnosis and management plan.

Maternal-Fetal Medicine

Documentation Requirements

Comprehensive assessments of maternal and fetal health, including ultrasound findings and laboratory results.

Common Clinical Scenarios

Consultation for a high-risk pregnancy due to pre-existing hypertension and new-onset pre-eclampsia.

Billing Considerations

Focus on the multidisciplinary approach to managing high-risk pregnancies, including potential interventions.

Coding Guidelines

Inclusion Criteria

Use O11.2 When
  • Follow the official ICD
  • CM guidelines for coding hypertension in pregnancy, ensuring that the correct trimester is documented and that the condition is accurately reflected in the coding

Exclusion Criteria

Do NOT use O11.2 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

99214CPT Code

Established patient office visit, moderate complexity

Clinical Scenario

Used for follow-up visits for patients with pre-existing hypertension and pre-eclampsia.

Documentation Requirements

Document blood pressure readings, symptoms, and treatment plans.

Specialty Considerations

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

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 accuracy of data collection and reimbursement for complex cases like pre-existing hypertension with pre-eclampsia.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of obstetric conditions, improving the accuracy of data collection and reimbursement for complex cases like pre-existing hypertension with pre-eclampsia.

Reimbursement & Billing Impact

reimbursement for complex cases like pre-existing hypertension with pre-eclampsia.

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 a chronic condition that exists before pregnancy, while gestational hypertension develops after 20 weeks of pregnancy in women who previously had normal blood pressure. Accurate coding is essential to reflect the patient's history and current condition.