CPT® Code 59136

The CPT® Code 59136 refers to the surgical treatment of an ectopic pregnancy specifically located in the interstitial area of the uterus. An interstitial pregnancy is a type of ectopic pregnancy where the gestational sac implants within the interstitial segment of the fallopian tube, which is situated within the muscular wall, or myometrium, of the uterus. This condition is characterized by the growth of the pregnancy tissue into the myometrial tissue, making it a rare and potentially life-threatening situation. It is also known as a cornual pregnancy, which occurs when the gestational sac implants in one of the upper or lateral regions of the uterus. The procedure associated with CPT® Code 59136 involves a partial resection of the uterus at the site of the interstitial pregnancy to manage this critical condition. The surgical approach may vary, as there is no standardized technique for this procedure. Prior to the surgical intervention, a diagnostic laparoscopy is performed to confirm the diagnosis of interstitial ectopic pregnancy and to accurately locate the gestational sac. The surgical process includes making an incision in the abdomen to expose the anterior surface of the uterus, injecting the uterus with diluted vasopressin, and using a monopolar electrosurgical cutting device to create an incision along the bulge of the uterus. The affected portion of the uterus is then carefully dissected from the surrounding tissue, allowing for the removal of the gestational sac along with the minimal necessary amount of uterine tissue. Finally, the myometrium is approximated, and the uterus is repaired using either a figure-of-8 configuration or running mattress sutures to ensure proper healing.