CPT® Code 84378

A laboratory test designated by CPT® Code 84378 is utilized to measure the concentration of sugars, which include mono-, di-, and oligosaccharides, in various specimens such as blood, body fluids, or excrement. Sugars are categorized based on their molecular structure: monosaccharides are single carbohydrate units, examples of which include glucose, fructose, and galactose. Disaccharides consist of two monosaccharide units, with common examples being sucrose (composed of fructose and glucose), lactose (composed of glucose and galactose), and maltose (composed of two glucose units). The human body metabolizes these simple sugars through oxidation to generate energy. Oligosaccharides, on the other hand, are short chains of monosaccharides typically containing three to ten units. These compounds can attach to proteins and lipids, forming glycans, and are naturally found in plant fibers such as starch and cellulose. They play a significant role as prebiotics, promoting the growth of beneficial bacteria in the large intestine, which in turn aids in the production of short-chain fatty acids (SCFAs) and certain B vitamins. The test associated with code 84378 is particularly useful for screening carbohydrate malabsorption disorders and for detecting lysosomal storage diseases, including mannosidosis, fucosidosis, GM1 gangliosidosis, and sialic acid storage disease. This code is specifically applied for the quantitative analysis of a single sugar, such as when testing for galactose-1-phosphate in red blood cells using gas chromatography-mass spectrometry or measuring 1,5 anhydroglucitol in serum or plasma through a quantitative enzymatic method. For tests involving multiple sugar molecules, CPT® Code 84379 is utilized.