O43.233 Placenta percreta, third trimester

Name of the Condition

• Placenta Percreta, Third Trimester

Summary

Placenta percreta, third trimester, is a severe form of morbidly adherent placenta where the placenta abnormally attaches to the uterine wall and penetrates through the myometrium (uterine muscle layer), potentially invading adjacent structures like the bladder or bowel. This condition can lead to life-threatening complications during delivery, including severe hemorrhage and organ damage, requiring specialized management to minimize risks to both the mother and fetus.

Causes

Placenta percreta occurs due to abnormal placental implantation, where the placenta fails to separate properly from the uterine wall after delivery. This is often associated with scarring or damage to the uterine tissue, such as from prior uterine surgery (e.g., cesarean sections) or other uterine abnormalities that disrupt the normal separation process.

Risk Factors

• Prior uterine surgery, including multiple cesarean deliveries.
• Advanced maternal age.
• Placenta previa (placenta covering the cervix).
• Previous history of morbidly adherent placenta.
• Uterine conditions like fibroids or endometrial scarring.
• Multiparity (having had multiple pregnancies).

Symptoms

• Vaginal bleeding during the third trimester, which may be painless or accompanied by cramping.
• Abnormal placental location noted on prenatal imaging.
• Uterine tenderness or pain during pregnancy.
• Signs of anemia or shock if bleeding occurs.

Diagnosis

Diagnosis is typically made through prenatal imaging, such as ultrasound or MRI, which can identify abnormal placental attachment and invasion. Clinical evaluation may include assessing symptoms like vaginal bleeding and reviewing risk factors. In some cases, diagnosis is confirmed during delivery when the placenta fails to separate.

Treatment Options

Management involves a multidisciplinary approach, including planned delivery at a specialized center. Treatment may include cesarean hysterectomy to control bleeding, blood transfusions, and potential repair of invaded organs. Post-delivery care focuses on monitoring for complications and recovery.

Prognosis and Follow-Up

Prognosis depends on the extent of placental invasion and associated complications. Close follow-up is essential to monitor for delayed hemorrhage, infection, or other issues. Long-term outcomes may include recovery from surgery and addressing any organ damage.

Complications

• Severe maternal hemorrhage requiring transfusion or hysterectomy.
• Damage to adjacent organs (e.g., bladder, bowel).
• Preterm delivery.
• Maternal or fetal mortality in severe cases.

Lifestyle & Prevention

While prevention is limited, managing risk factors (e.g., avoiding unnecessary uterine surgery) may reduce likelihood. Prenatal care and early detection through imaging can help plan for delivery and minimize risks.

When to Seek Professional Help

Seek immediate medical attention for vaginal bleeding, severe abdominal pain, or signs of shock (e.g., dizziness, rapid heartbeat) during pregnancy. Regular prenatal visits are critical for monitoring high-risk pregnancies.

Tips for Medical Coders

Document the trimester (third trimester) and confirm the diagnosis of placenta percreta. Ensure clinical documentation supports the severity and any associated complications. Code O43.233 is specific to placenta percreta in the third trimester; verify no other codes are needed for related conditions unless explicitly documented.