Low lying placenta NOS or without hemor, third trimester

This code signifies a placenta that is implanted in the lower uterine segment, but not covering the internal cervical os, during the third trimester of pregnancy. It specifically applies when there is no associated bleeding or when the type of low-lying placenta is not further specified.

Use this code when documentation indicates a low-lying placenta identified in the third trimester without hemorrhage. This diagnosis is typically made via ultrasound and confirmed by the physician's interpretation. It applies when the placental edge is within 2 cm of the internal os but not covering it.

• Ensure the documentation explicitly states "third trimester" and "without hemorrhage" or "NOS" for a low-lying placenta.
• Distinguish from complete or partial placenta previa (O44.0-O44.2), where the placenta covers the internal os.
• Do not use if hemorrhage is present; instead, select the appropriate code for low-lying placenta with hemorrhage (O44.40-O44.42).