CPT® Code 76813

Ultrasound, pregnant uterus, real time with image documentation, first trimester fetal nuchal translucency measurement, transabdominal or transvaginal approach; single or first gestation

The CPT® Code 76813 refers to a specific ultrasound procedure performed on a pregnant uterus during the first trimester. This procedure utilizes real-time imaging technology to document the measurement of fetal nuchal translucency, which is a critical assessment in prenatal care. The ultrasound can be conducted using either a transabdominal or transvaginal approach, depending on the clinical situation and the preference of the healthcare provider. Real-time ultrasound scanning is a dynamic imaging technique that not only captures two-dimensional images of the fetus but also allows for the observation of movement over time, providing valuable insights into fetal development. Nuchal translucency is defined as the measurement of subcutaneous edema located in the fetal neck area, which is assessed by determining the maximum thickness of the sonographically lucent zone. This zone is measured between the inner surface of the fetal skin and the outer surface of the soft tissue that covers the cervical spine or occipital bone. An increased measurement of nuchal translucency during the first trimester can indicate potential chromosomal defects and genetic abnormalities, including conditions such as Down syndrome, trisomy 13 or 18, as well as various heart and great vessel anomalies and skeletal dysplasias. For billing purposes, CPT® Code 76813 is designated for the first or single gestation, while CPT® Code 76814 should be used for each additional gestation.