CPT® Code 84478

The CPT® Code 84478 refers to a laboratory test specifically designed to measure triglyceride levels in blood or body fluids. Triglycerides are a type of fat (lipid) that consists of glycerol and three fatty acid molecules. They are significant components of very low-density lipoproteins (VLDL) found in the bloodstream, as well as chylomicrons, which are particles that transport cholesterol, protein, and triglycerides in lymphatic fluid. The primary function of triglycerides is to serve as an energy source during metabolic processes, and they play a crucial role in transporting any unused dietary fats or calories to the liver and fat cells for storage. Elevated triglyceride levels can indicate recent consumption of carbohydrates and/or fats, which is why it is essential for patients to fast for 12 hours prior to the blood sample collection. The blood sample is typically obtained through a procedure known as venipuncture, which is separately reportable. In cases where body fluid is required, it can be collected via needle aspiration or through incision and drainage of pooled fluid. The testing of serum, plasma, and body fluids for triglyceride levels is conducted using quantitative enzymatic methods, ensuring accurate measurement of triglyceride concentrations.