CPT® Code 70390

Sialography, as defined by CPT® Code 70390, is a specialized diagnostic radiographic examination focused on the salivary ducts and glands. This procedure involves the use of a small amount of opaque dye, which is injected into the salivary gland duct. The injection is facilitated through a small, flexible catheter that is carefully inserted through the mouth and directed into the duct. Prior to the injection of the contrast material, an initial x-ray may be performed to ensure that there are no obstructions, such as stones, that could impede the flow of the contrast agent. Following the injection, the patient is typically given a substance, such as lemon juice, to stimulate saliva production. This stimulation is crucial as it allows for a clearer visualization of the salivary drainage into the mouth. Multiple x-rays are then taken from various angles to capture detailed images of the salivary glands and ducts. The physician subsequently reviews these images to identify any abnormalities, including the presence of small stones, strictures, ectasia, or other potential signs of disease affecting the salivary system.