O44.43 Low lying placenta NOS or without hemorrhage, third trimester

Name of the Condition

• Low lying placenta NOS or without hemorrhage, third trimester

Summary

Low lying placenta NOS or without hemorrhage, third trimester refers to a placental position where the placenta is located in the lower uterine segment but does not fully cover the cervix, and no bleeding is present, specifically identified during the third trimester of pregnancy. This condition requires monitoring to assess for potential complications as the pregnancy progresses.

Causes

The exact cause is not fully understood, but it often involves abnormal placental implantation in the lower uterine segment. Factors such as uterine scarring or abnormal vascularization may contribute to its development.

Risk Factors

• Previous placenta previa or low lying placenta
• Multiple pregnancies (e.g., twins, triplets)
• Prior uterine surgery (e.g., cesarean section, dilation and curettage)
• Advanced maternal age (over 35)
• Smoking or substance use during pregnancy
• Multiparity (having given birth multiple times)

Symptoms

In the absence of hemorrhage, symptoms are often minimal or absent. Some individuals may experience mild spotting or discomfort, but painless vaginal bleeding is not typically present.

Diagnosis

Diagnosis is confirmed via transabdominal or transvaginal ultrasound, which visualizes the placenta's position relative to the cervix. Additional imaging or monitoring may be used to assess fetal well-being.

Treatment Options

• Monitoring throughout the third trimester
• Avoiding activities that may increase bleeding risk (e.g., intercourse, strenuous exercise)
• Scheduled delivery planning, often via cesarean section, if the placenta remains low-lying near term

Prognosis and Follow-Up

Most cases resolve as the uterus expands, moving the placenta away from the cervix. Close monitoring is essential to detect any changes or complications. Follow-up ultrasounds may be performed to assess placental position and fetal health.

Complications

• Increased risk of bleeding if the placenta remains low-lying near term
• Potential need for cesarean delivery
• Rarely, severe hemorrhage requiring emergency intervention

Lifestyle & Prevention

• Avoid smoking or substance use during pregnancy
• Attend all prenatal appointments for monitoring
• Follow provider guidance on activity restrictions

When to Seek Professional Help

Seek immediate medical attention for any vaginal bleeding, sudden abdominal pain, or signs of preterm labor.

Tips for Medical Coders

Document the trimester (third trimester) and absence of hemorrhage clearly. Ensure the placental position is confirmed via imaging and that no other complications (e.g., previa) are present. Code O44.43 is specific to the third trimester without hemorrhage.