CPT® Code 82375

A laboratory test known as the carboxyhemoglobin (COHb) quantitative test is conducted to determine the levels of carboxyhemoglobin in the blood. Carboxyhemoglobin is a stable compound formed when carbon monoxide binds with hemoglobin in red blood cells (RBCs). This binding process is significant because it reduces the blood's ability to carry oxygen, which is essential for the proper functioning of vital organs. In normal circumstances, trace amounts of carboxyhemoglobin can be detected in all blood samples; however, individuals who smoke typically exhibit elevated baseline levels due to the inhalation of carbon monoxide from tobacco smoke. The presence of carbon monoxide in the bloodstream can lead to serious health issues, particularly in cases of carbon monoxide or methylene chloride poisoning, as it interferes with the oxygenation of tissues. To perform this test, a blood sample is collected, which can be obtained through various methods such as venipuncture, heelstick, or arterial blood draw. The quantitative measurement of COHb levels is then conducted using a technique called spectrophotometry, which allows for precise analysis of the blood sample to assess the extent of carbon monoxide exposure.