P23.3 Congenital pneumonia due to streptococcus, group B

Name of the Condition

• Congenital pneumonia due to streptococcus, group B
• ICD-10-CM Code: P23.3

Summary

Congenital pneumonia due to streptococcus, group B is a bacterial lung infection in newborns caused by group B streptococcus (GBS), a pathogen acquired in utero or during delivery. This condition presents with respiratory distress and may involve systemic infection, requiring prompt medical attention to prevent complications.

Causes

The condition is caused by group B streptococcus, a bacterium transmitted from the mother to the fetus. Transmission can occur via transplacental passage during pregnancy or exposure to the bacteria in the birth canal during delivery. GBS is a common colonizer of the maternal genital tract and a leading cause of neonatal infections.

Risk Factors

• Maternal colonization with group B streptococcus
• Prolonged rupture of membranes (≥18 hours)
• Preterm birth (especially <37 weeks gestation)
• Maternal intrapartum fever or chorioamnionitis
• Lack of intrapartum antibiotic prophylaxis in colonized mothers

Symptoms

Symptoms may include respiratory distress (e.g., tachypnea, grunting, retractions), cyanosis, poor feeding, lethargy, or signs of sepsis. Some infants may present with apnea, hypothermia, or irritability. Onset typically occurs within the first 24 hours of life.

Diagnosis

Diagnosis involves clinical evaluation of the newborn, including assessment of respiratory status and vital signs. Laboratory tests such as blood cultures, complete blood count, and C-reactive protein may be performed. Chest X-rays may show infiltrates or other signs of pneumonia. Maternal GBS status and intrapartum factors are also considered.

Treatment Options

Treatment includes intravenous antibiotics, typically ampicillin and gentamicin, to target group B streptococcus. Supportive care, such as oxygen therapy or mechanical ventilation, may be necessary for respiratory distress. Duration of antibiotics depends on clinical response and test results.

Prognosis and Follow-Up

With prompt treatment, most infants recover without long-term effects. Follow-up includes monitoring for respiratory stability, feeding ability, and signs of recurrence. Infants with severe disease may require extended hospitalization and ongoing evaluation for complications.

Complications

Potential complications include respiratory failure, sepsis, meningitis, or chronic lung disease. Delayed treatment increases the risk of severe outcomes, including neurological damage or death.

Lifestyle & Prevention

Prevention focuses on maternal screening for GBS colonization during pregnancy (typically at 35–37 weeks) and intrapartum antibiotic prophylaxis for colonized mothers. Avoiding prolonged rupture of membranes and ensuring sterile delivery practices may reduce risk.

When to Seek Professional Help

Seek immediate medical attention if a newborn shows signs of respiratory distress, lethargy, poor feeding, or fever. Early intervention is critical to improve outcomes.

Tips for Medical Coders

Code P23.3 is specific to congenital pneumonia caused by group B streptococcus. Documentation should confirm the etiology (e.g., positive cultures, maternal GBS status) and specify the condition as present at birth. Ensure alignment with clinical findings to support accurate coding.