CPT® Code 94762

The CPT® Code 94762 refers to a noninvasive procedure that utilizes ear or pulse oximetry to measure oxygen saturation levels in the blood through continuous overnight monitoring. This procedure is essential for assessing the percentage of hemoglobin (Hb) that is saturated with oxygen, which is crucial for identifying any lower than normal levels of oxygen in the bloodstream. The oximetry process involves the attachment of a probe to the patient's earlobe or finger, which is then connected to a computerized unit. The probe emits light at two different wavelengths, which is partially absorbed by the hemoglobin in the blood. The degree of absorption varies depending on whether the hemoglobin is saturated or desaturated with oxygen. The oximeter's processor calculates the absorption of these wavelengths and displays the percentage of oxygenated hemoglobin. Additionally, the device can be programmed to activate an audible alarm if the oxygen saturation levels drop below a predetermined threshold. This code is specifically designated for continuous overnight monitoring, distinguishing it from other related codes such as 94760, which is used for a single oxygen saturation determination, and 94761, which is applicable for multiple determinations, such as those taken during exercise.