O43.239 Placenta percreta, unspecified trimester

Name of the Condition

• Placenta Percreta, Unspecified Trimester

Summary

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

Diagnosis

Diagnosis is typically made through prenatal imaging, such as ultrasound or MRI, to assess placental attachment and invasion. Clinical evaluation may include monitoring for bleeding or other complications. In some cases, diagnosis is confirmed during delivery when abnormal placental adherence is observed.

Treatment Options

Management involves a multidisciplinary approach, often including planned cesarean delivery with hysterectomy to control bleeding. Blood transfusions and intensive care may be necessary. In select cases, conservative management (e.g., leaving the placenta in situ) may be considered, but this carries risks of infection or ongoing bleeding.

Prognosis and Follow-Up

Prognosis depends on the extent of placental invasion and timely intervention. Severe cases can result in significant maternal morbidity or mortality. Follow-up care includes monitoring for complications like infection, anemia, or future pregnancy risks. Fetal outcomes vary based on gestational age and delivery timing.

Complications

• Severe maternal hemorrhage requiring transfusion or hysterectomy.
• Organ damage (e.g., bladder, bowel) from placental invasion.
• Infection or sepsis.
• Preterm delivery or fetal distress.
• Long-term maternal health issues, including infertility or uterine scarring.

Lifestyle & Prevention

• Prenatal care to monitor high-risk pregnancies.
• Avoiding unnecessary uterine procedures when possible.
• Early reporting of bleeding or pain during pregnancy.
• Discussing prior uterine surgery with healthcare providers before conception.

When to Seek Professional Help

Seek immediate medical attention for vaginal bleeding, severe abdominal pain, dizziness, or signs of shock during pregnancy. Regular prenatal visits are essential for high-risk individuals to detect and manage complications early.

Tips for Medical Coders

Document the trimester (if specified) and any associated complications (e.g., hemorrhage, organ invasion) to support accurate coding. Use O43.239 for placenta percreta when the trimester is not documented. Ensure clinical correlation with imaging or delivery notes to confirm diagnosis.