O98.013 Tuberculosis complicating pregnancy, third trimester

Name of the Condition

• Tuberculosis complicating pregnancy, third trimester (ICD Code: O98.013)

Summary

This condition describes tuberculosis (TB) infection occurring during the third trimester of pregnancy. TB is a bacterial infection primarily affecting the lungs but can involve other organs. In pregnancy, it requires careful management to address maternal health and fetal well-being, with considerations for treatment timing and potential transmission risks.

Causes

Tuberculosis is caused by the bacterium Mycobacterium tuberculosis. In pregnancy, the infection may be newly acquired or reactivated from a latent state. Pregnancy-related immune changes can influence disease progression or severity, and the third trimester may present unique challenges for both diagnosis and treatment.

Risk Factors

• Pre-existing latent or active TB infection
• Weakened immune system (e.g., due to malnutrition or comorbidities)
• Exposure to TB in high-prevalence environments
• Lack of prior TB screening or treatment
• HIV co-infection or other immunosuppressive conditions

Symptoms

• Persistent cough (often with sputum)
• Fever, night sweats, or unexplained weight loss
• Fatigue or general malaise
• Chest pain or shortness of breath (if pulmonary TB)
• Symptoms may be mild or atypical in late pregnancy.

Diagnosis

Diagnosis involves clinical evaluation, imaging (e.g., chest X-ray with fetal shielding), and laboratory tests (e.g., sputum culture, nucleic acid amplification tests). Prenatal screening for TB is recommended in high-risk populations, and third-trimester timing may require urgent evaluation to guide management before delivery.

Treatment Options

• Antitubercular therapy (e.g., isoniazid, rifampin) tailored for pregnancy
• Close monitoring for drug efficacy and maternal/fetal safety
• Coordination with obstetric care to plan delivery and postpartum management
• Preventive therapy for latent TB if indicated

Prognosis and Follow-Up

With appropriate treatment, outcomes for both mother and fetus are generally favorable. Follow-up includes monitoring for treatment response, potential drug toxicity, and ensuring completion of therapy. Postpartum care should address TB management and infant screening for exposure.

Complications

• Maternal respiratory compromise or disseminated disease
• Preterm labor or low birth weight
• Vertical transmission to the fetus (rare but possible)
• Drug-related adverse effects requiring adjustment

Lifestyle & Prevention

• Avoid exposure to individuals with active TB
• Ensure adequate nutrition and immune support
• Complete prescribed TB treatment to prevent reactivation
• Follow prenatal care guidelines for high-risk populations

When to Seek Professional Help

Seek immediate care if experiencing persistent cough, fever, unexplained weight loss, or respiratory symptoms. Prompt evaluation is critical in the third trimester to manage TB and reduce risks to maternal and fetal health.

Tips for Medical Coders

Document the trimester (third trimester) and confirm TB complicating pregnancy. Include details on diagnostic methods, treatment, and any maternal or fetal complications. Ensure alignment with obstetric and infectious disease documentation for accurate code assignment.