O43.113 Circumvallate placenta, third trimester

Name of the Condition

• Circumvallate Placenta, Third Trimester

Summary

Circumvallate placenta is a placental malformation characterized by a raised, folded edge of the placental membranes. In the third trimester, this condition may be identified during routine prenatal imaging or due to complications. It can affect placental function and requires monitoring to assess potential impacts on pregnancy outcomes.

Causes

The exact causes of circumvallate placenta are not fully understood, but it may result from abnormal placental development or incomplete attachment of the chorionic membranes. Genetic factors or disruptions during early placental formation could contribute, though specific etiologies are often undetermined.

Risk Factors

• Advanced maternal age.
• Pre-existing maternal conditions (e.g., diabetes, hypertension).
• Substance use during pregnancy.
• Prior placental abnormalities in previous pregnancies.
• Uterine abnormalities or prior uterine surgery.

Symptoms

• Vaginal bleeding or spotting.
• Abdominal pain or cramping.
• Abnormal ultrasound findings indicating placental structure issues.

Diagnosis

Diagnosis is typically made via ultrasound imaging to assess placental structure and identify the characteristic folded edge. Doppler studies may evaluate blood flow, and maternal monitoring helps detect signs of complications.

Treatment Options

Management focuses on monitoring maternal and fetal well-being. Interventions may include bed rest, avoiding strenuous activity, and close observation for signs of placental insufficiency or bleeding. Delivery timing depends on maternal and fetal status.

Prognosis and Follow-Up

Prognosis varies based on severity and associated complications. Regular prenatal visits and imaging are essential to track placental function and fetal growth. Follow-up may involve continued monitoring until delivery or earlier intervention if complications arise.

Complications

• Placental abruption.
• Preterm labor.
• Fetal growth restriction.
• Maternal hemorrhage.
• Increased risk of cesarean delivery.

Lifestyle & Prevention

• Attend all prenatal appointments for monitoring.
• Avoid smoking, alcohol, and illicit drugs.
• Maintain a balanced diet and manage chronic conditions (e.g., diabetes, hypertension).
• Report any vaginal bleeding or abdominal pain promptly.

When to Seek Professional Help

Seek immediate medical attention for:

• Heavy vaginal bleeding.
• Severe abdominal pain or cramping.
• Reduced fetal movement.
• Signs of preterm labor (e.g., regular contractions, pelvic pressure).

Tips for Medical Coders

Document the trimester (third trimester) and any associated complications (e.g., bleeding, abruption) to support accurate coding. Ensure clinical documentation specifies the placental malformation and its impact on pregnancy management.