Z36.85 Encounter for antenatal screening for Streptococcus B

Name of the Condition

• Encounter for antenatal screening for Streptococcus B (ICD-10-CM Code: Z36.85)

Summary

This code represents a prenatal visit focused on screening for Group B Streptococcus (GBS) colonization in pregnant individuals. It is a routine part of prenatal care to identify potential risks for the newborn during delivery.

Causes

The need for this screening arises from planned, routine evaluation during pregnancy. GBS colonization is a common bacterial presence in the genital or rectal area, not caused by external factors but requiring assessment to prevent neonatal infection.

Risk Factors

• Previous GBS colonization in prior pregnancies
• Preterm labor (delivery before 37 weeks)
• Rupture of membranes for 18 hours or more
• Maternal fever during labor
• GBS bacteriuria during pregnancy

Symptoms

As this is a screening encounter, there are typically no symptoms prompting the visit. GBS colonization often occurs without noticeable signs.

Diagnosis

Diagnostic methods include a vaginal and rectal swab collected between 36–37 weeks of gestation. The sample is cultured to detect GBS presence. Rapid PCR tests may also be used for quicker results.

Treatment Options

In the context of this code, treatment does not directly apply. If GBS is detected, intravenous antibiotics (e.g., penicillin or ampicillin) are administered during labor to reduce transmission risk to the newborn.

Prognosis and Follow-Up

Prognosis is favorable with appropriate antibiotic prophylaxis during labor. Follow-up involves monitoring the newborn for early signs of infection (e.g., fever, difficulty feeding) in the first 24–48 hours post-delivery.

Complications

• Neonatal sepsis or meningitis if GBS is transmitted during delivery
• Preterm birth or stillbirth in rare cases
• Maternal postpartum infections (e.g., endometritis)

Lifestyle & Prevention

• Routine prenatal care and adherence to screening guidelines
• Good hygiene practices (e.g., handwashing) to reduce infection risk
• Prompt treatment of any urinary tract infections during pregnancy

When to Seek Professional Help

Seek care if experiencing signs of infection (e.g., fever, chills) during pregnancy or if the newborn shows symptoms like lethargy, poor feeding, or respiratory distress after delivery.

Tips for Medical Coders

Document the timing of the screening (36–37 weeks gestation) and whether results were positive or negative. Include details of any antibiotic prophylaxis administered during labor if GBS was detected. Ensure the encounter is clearly linked to prenatal care and screening for GBS colonization.