CPT® Code 84376

The CPT® Code 84376 refers to a laboratory test that is specifically designed to measure the presence of sugars, including 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, such as glucose, fructose, or galactose; disaccharides consist of two monosaccharides, 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 to generate energy. Oligosaccharides, which are chains of 3 to 10 monosaccharides, can attach to proteins and lipids, forming complex structures known as glycans. These oligosaccharides are naturally found in plant fibers, such as starch and cellulose, and 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 CPT® Code 84376 is particularly useful for screening carbohydrate malabsorption disorders and identifying lysosomal storage diseases, including mannosidosis, fucosidosis, GM1 gangliosidosis, and sialic acid storage disease. This code is utilized for the qualitative analysis of a single sugar substance and is applicable in scenarios where reducing substances are tested in fecal samples using colorimetric methods. For testing multiple sugar molecules, CPT® Code 84377 is employed, which may involve analyzing oligosaccharides in urine through thin layer chromatography.