CPT® Code 46938

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CPT® Code 46938 refers to the procedure of cryosurgery specifically targeting malignant rectal tumors. Cryosurgery is a minimally invasive technique that utilizes extremely cold temperatures to destroy or diminish the size of tumors located in the rectal area. The process involves the application of liquid nitrogen, which is known for its ability to freeze tissue effectively. This freezing action not only targets malignant tumors but can also be used to treat benign tumors, although the specific code for benign tumors is CPT® Code 46937. During the procedure, a cryoprobe is either placed directly on the surface of the tumor or inserted into the tumor itself. The cryoprobe circulates liquid nitrogen through its tip, achieving supercooling of the tissue. Once the tissue reaches the necessary low temperature, or when the ice ball formed around the probe reaches the desired size, the probe is turned off, allowing the tissue to thaw. It is important to note that multiple freeze-thaw cycles may be necessary to ensure complete destruction or significant reduction of the malignant lesion. This technique is advantageous as it minimizes damage to the surrounding healthy tissue, making it a preferred option for treating rectal tumors.