CPT® Code 83045

Methemoglobin is a form of hemoglobin, the protein in red blood cells responsible for transporting oxygen throughout the body. In methemoglobin, the iron within the heme group is oxidized to the ferric state, which prevents it from effectively releasing oxygen to tissues. Normally, about 1-2% of hemoglobin in the human body exists as methemoglobin; however, elevated levels can occur due to genetic factors or more commonly, as a result of exposure to certain drugs or environmental toxins. The qualitative test for methemoglobin, represented by CPT® Code 83045, is performed on a blood sample obtained through venipuncture, which is a separate and reportable procedure. This code is specifically used when the presence of methemoglobin is being tested, distinguishing it from CPT® Code 83050, which is utilized when quantifying the amount of methemoglobin present in the blood. Understanding the levels of methemoglobin is crucial for diagnosing conditions related to oxygen transport and potential toxicity.