CPT® Code 83874

The CPT® Code 83874 refers to a laboratory test that measures the levels of myoglobin in the blood or urine. Myoglobin is a crucial protein that binds iron and oxygen, primarily found in muscle tissue. This test is significant as it helps in diagnosing conditions related to muscle injury, such as trauma, myocardial infarction (heart attack), or extreme physical exertion. When muscle tissue is damaged, myoglobin is released into the bloodstream, leading to elevated levels that can be detected through this test. It is important to note that high levels of myoglobin can be harmful, particularly to the kidneys, as they can be toxic to the renal tubules and may result in acute renal failure. The test can be performed using a blood sample, which is collected through a venipuncture, a procedure that is separately reportable. Additionally, urine samples can be collected either from a random voided sample or a 24-hour specimen. The analysis of serum, plasma, and urine for myoglobin levels is conducted using a quantitative electrochemiluminescent immunoassay, a sensitive and specific method for measuring this protein in the body.