CPT® Code 82040

The CPT® Code 82040 refers to a laboratory test that measures the levels of albumin in serum, plasma, or whole blood. Albumin is a vital plasma protein that plays a crucial role in maintaining the colloidal osmotic pressure of blood, which is essential for proper fluid balance within the body. This protein has the ability to bind various substances, including water, electrolytes such as sodium, potassium, and calcium, as well as fatty acids, hormones, bilirubin, and certain medications. The measurement of albumin levels is significant in evaluating a patient's nutritional status, as low levels may indicate malnutrition or other underlying health issues. To perform this test, a blood sample is collected, typically through a procedure known as venipuncture, which is separately reportable. The analysis of the collected plasma, serum, or whole blood is conducted using techniques such as spectrophotometry or quantitative nephelometry, both of which provide accurate quantification of albumin concentration in the sample.