O41.1214 Chorioamnionitis, first trimester, fetus 4

Name of the Condition

• Chorioamnionitis, first trimester, fetus 4 (ICD Code: O41.1214)

Summary

Chorioamnionitis is an infection of the amniotic sac and membranes during the first trimester of pregnancy, involving microbial invasion of the amniotic cavity. This condition can affect both maternal and fetal health, with potential for inflammation and complications if not addressed promptly. The code specifies involvement of fetus 4, indicating a multifetal pregnancy context.

Causes

Infections typically result from ascending bacteria or pathogens from the vaginal tract, though hematogenous spread (via the bloodstream) or direct contamination may occur. Common organisms include group B streptococcus, Escherichia coli, and other vaginal flora. The exact etiology may not always be identified, especially in early pregnancy.

Risk Factors

• Prolonged rupture of membranes (if present)
• Multiple vaginal examinations
• Prior genitourinary infections
• Invasive prenatal procedures
• Immunocompromised maternal status
• Multifetal pregnancy (as indicated by fetus 4)

Symptoms

• Maternal fever (≥38°C or 100.4°F)
• Maternal tachycardia (≥100 beats per minute)
• Uterine tenderness
• Foul-smelling vaginal discharge
• Pelvic pain or pressure
• Fetal tachycardia (if detectable)

Diagnosis

Diagnosis relies on clinical evaluation of maternal symptoms, laboratory testing for infection markers (e.g., elevated white blood cell count), and ultrasound to assess amniotic fluid and fetal status. Amniocentesis may be used for culture if membranes are ruptured. In multifetal pregnancies, monitoring each fetus separately may be necessary.

Treatment Options

Treatment typically involves broad-spectrum antibiotics to target the infection, with close monitoring of maternal and fetal status. In severe cases, delivery may be considered, though this depends on gestational age and fetal viability. Supportive care, such as hydration and fever management, is also important.

Prognosis and Follow-Up

Prognosis depends on the severity of the infection, gestational age, and fetal status. Early treatment improves outcomes, but complications like preterm labor or fetal distress may occur. Follow-up includes monitoring for recurrence and assessing long-term maternal and fetal health.

Complications

• Preterm labor or delivery
• Fetal growth restriction
• Neonatal sepsis (if infection spreads)
• Maternal sepsis or systemic infection
• Increased risk of future pregnancy complications

Lifestyle & Prevention

• Practice good prenatal hygiene to reduce infection risk
• Avoid unnecessary vaginal examinations
• Seek prompt care for genitourinary symptoms
• Follow prenatal care guidelines closely
• Report any unusual discharge or fever immediately

When to Seek Professional Help

Seek immediate medical attention if experiencing fever, pelvic pain, foul-smelling discharge, or fetal movement changes. Early evaluation is critical to prevent progression of infection and protect maternal and fetal health.

Tips for Medical Coders

Document the presence of multifetal pregnancy (fetus 4) and trimester specificity when assigning this code. Ensure clinical documentation supports the diagnosis of chorioamnionitis, including relevant symptoms, diagnostic tests, and treatment. Verify that the code aligns with the documented trimester and fetal context to ensure accurate coding.