CPT® Code 59135

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The CPT® Code 59135 refers to the surgical treatment of an ectopic pregnancy specifically located in the interstitial segment of the fallopian tube, which necessitates a total hysterectomy. An interstitial pregnancy is a type of ectopic pregnancy where the fertilized egg implants within the muscular wall of the uterus, known as the myometrium. This condition is critical as it poses significant risks to the mother due to the potential for rupture and severe internal bleeding. The term 'cornual pregnancy' is also associated with interstitial pregnancies, particularly in cases involving a unicornuate or bicornuate uterus. A unicornuate uterus is a congenital anomaly characterized by the incomplete development of the uterus, resulting in only one lateral half being formed. Conversely, a bicornuate uterus is divided into two distinct horns due to the improper fusion of the paramesonephric ducts during fetal development. The surgical intervention described by CPT® Code 59135 involves a total hysterectomy, which entails the complete removal of the uterus and cervix to address the complications arising from the interstitial pregnancy. This procedure is performed through an abdominal incision, allowing for direct access to the uterus and surrounding structures, ensuring that the ectopic tissue is effectively managed to prevent further complications.