O43.229 Placenta increta, unspecified trimester

Name of the Condition

• Placenta increta, unspecified trimester

Summary

Placenta increta is a type of morbidly adherent placenta where the placenta abnormally attaches to the uterine wall and invades the myometrium (uterine muscle layer). This condition can lead to significant complications during delivery, including severe hemorrhage and uterine damage, requiring specialized management to minimize risks to the mother and fetus. The unspecified trimester designation indicates the condition is documented without a specific gestational period.

Causes

Placenta increta 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 during pregnancy.
• Signs of anemia or shock if bleeding occurs.

Diagnosis

Diagnosis is typically made through prenatal imaging, such as ultrasound or MRI, which may reveal abnormal placental attachment. Clinical evaluation and correlation with risk factors also support the diagnosis. In some cases, the condition may be identified during delivery when the placenta fails to separate as expected.

Treatment Options

Management depends on the severity and gestational age. Options may include planned cesarean delivery with hysterectomy to control bleeding, conservative management (e.g., leaving the placenta in situ), or uterine artery embolization. Multidisciplinary care involving obstetrics, maternal-fetal medicine, and anesthesia is often required.

Prognosis and Follow-Up

Prognosis varies based on the extent of placental invasion and management. Severe cases can lead to life-threatening hemorrhage, but early detection and specialized care improve outcomes. Follow-up may include monitoring for complications like infection or retained placental tissue, and future pregnancy planning should consider risks.

Complications

• Severe postpartum hemorrhage.
• Uterine rupture or perforation.
• Need for hysterectomy.
• Infection.
• Blood transfusion requirements.
• Maternal or fetal mortality in severe cases.

Lifestyle & Prevention

While not always preventable, reducing risk factors (e.g., minimizing unnecessary uterine surgeries) may lower the likelihood. Prenatal care and early imaging for high-risk patients can aid in planning. Avoiding trauma to the uterus during pregnancy is also important.

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 essential for high-risk individuals to monitor for this condition.

Tips for Medical Coders

Use this code for placenta increta when the trimester is not specified. Document the absence of trimester details or note if unspecified. Ensure clinical documentation supports the diagnosis, as coding requires clear evidence of the condition. Verify that no more specific trimester code (e.g., first, second, or third) applies before using this unspecified code.