CPT® Code 59100

The CPT® Code 59100 refers to an abdominal hysterotomy, a surgical procedure in which an incision is made in the lower abdomen to access the uterus. This procedure is typically indicated for specific conditions such as a hydatidiform mole or a failed abortion. A hydatidiform mole, also known as a molar pregnancy, is characterized by abnormal growth of placental tissue that can lead to complications, including the potential development of choriocarcinoma, a type of cancer. In a complete molar pregnancy, only a mass of placental tissue is formed without any viable embryo, while a partial molar pregnancy may contain both abnormal placental tissue and some remnants of nonviable embryonic development. During the hysterotomy, the physician carefully incises the lower abdomen and exposes the uterus, entering it through the lower segment, similar to a cesarean section. The primary goal of the procedure is to remove the hydatidiform mole or any nonviable fetus and associated placental tissue. Post-removal, the uterus is thoroughly inspected to ensure complete excision of the abnormal tissue, and any removed tissue is sent for pathological examination. If the procedure is performed due to abortion, the physician also ensures that all products of conception are removed, and curettage may be performed to clear the uterine cavity before closing the incision with sutures. The abdominal layers are then closed in a systematic manner to promote healing.