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ICD-10 Guide
ICD-10 CodesO13.2

O13.2

Billable

Gestational [pregnancy-induced] hypertension without significant proteinuria, second trimester

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

Code Description

ICD-10 O13.2 is a billable code used to indicate a diagnosis of gestational [pregnancy-induced] hypertension without significant proteinuria, second trimester.

Key Diagnostic Point:

Gestational hypertension, also known as pregnancy-induced hypertension, is a condition characterized by elevated blood pressure that develops after 20 weeks of gestation in a previously normotensive woman. In the case of O13.2, the hypertension occurs during the second trimester and is not accompanied by significant proteinuria, which differentiates it from preeclampsia. Blood pressure readings of 140/90 mmHg or higher are typically used to diagnose this condition. Monitoring is crucial, as gestational hypertension can progress to more severe forms of hypertension or lead to complications for both the mother and fetus. Regular prenatal visits should include blood pressure checks, and if hypertension is detected, further evaluation and management strategies should be implemented to ensure maternal and fetal well-being. Treatment may involve lifestyle modifications, close monitoring, and in some cases, medication to control blood pressure. The absence of significant proteinuria is a key factor in this diagnosis, as it helps to rule out preeclampsia, which has more serious implications.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between gestational hypertension and preeclampsia
  • Understanding the significance of proteinuria in diagnosis
  • Monitoring and documenting blood pressure readings accurately
  • Recognizing the potential for progression to severe hypertension

Audit Risk Factors

  • Inaccurate blood pressure documentation
  • Failure to note the absence of proteinuria
  • Misclassification of gestational hypertension as preeclampsia
  • Inconsistent monitoring frequency

Specialty Focus

Medical Specialties

Obstetrics and Gynecology

Documentation Requirements

Detailed prenatal visit notes including blood pressure readings, weight, and any symptoms reported by the patient.

Common Clinical Scenarios

A patient presents with elevated blood pressure during a routine prenatal visit in the second trimester.

Billing Considerations

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

Maternal-Fetal Medicine

Documentation Requirements

Comprehensive records of maternal and fetal assessments, including ultrasound findings and any interventions.

Common Clinical Scenarios

A high-risk patient with a history of hypertension is monitored closely throughout her pregnancy.

Billing Considerations

Consideration of additional risk factors and potential complications that may arise from gestational hypertension.

Coding Guidelines

Inclusion Criteria

Use O13.2 When
  • According to ICD
  • 10 coding guidelines, gestational hypertension is coded based on the presence or absence of proteinuria and the trimester of pregnancy
  • Accurate documentation of blood pressure readings and clinical assessments is essential for proper coding

Exclusion Criteria

Do NOT use O13.2 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

99213CPT Code

Established patient office visit, Level 3

Clinical Scenario

Used for routine prenatal visits where blood pressure is monitored.

Documentation Requirements

Document blood pressure readings, weight, and any symptoms.

Specialty Considerations

Ensure that the visit includes a thorough assessment of the patient's overall health.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of gestational hypertension, improving the accuracy of diagnoses and treatment plans. This specificity helps in tracking outcomes and managing care effectively.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of gestational hypertension, improving the accuracy of diagnoses and treatment plans. This specificity helps in tracking outcomes and managing care effectively.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of gestational hypertension, improving the accuracy of diagnoses and treatment plans. This specificity helps in tracking outcomes and managing care effectively.

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 gestational hypertension and preeclampsia?

Gestational hypertension is characterized by high blood pressure without significant proteinuria, while preeclampsia involves both high blood pressure and significant proteinuria, indicating a more severe condition that requires different management strategies.