CPT® Code 84377

The CPT® Code 84377 refers to a laboratory test that measures the presence of various sugar molecules, specifically mono-, di-, and oligosaccharides, in a given specimen. This test is crucial for assessing the levels of different types of sugars, which can include monosaccharides like glucose, fructose, and galactose, as well as disaccharides such as sucrose, lactose, and maltose. Monosaccharides are the simplest form of carbohydrates, while disaccharides consist of two monosaccharide units linked together. Oligosaccharides, on the other hand, are more complex carbohydrates that typically consist of 3 to 10 monosaccharide units. These oligosaccharides can attach to proteins and lipids, forming glycans that play significant roles in biological processes. They are also found in plant fibers and serve as prebiotics, promoting the growth of beneficial bacteria in the large intestine, which in turn aids in the production of short-chain fatty acids and certain B vitamins. The test coded as 84377 is particularly useful for screening carbohydrate malabsorption disorders and identifying lysosomal storage diseases, including mannosidosis, fucosidosis, GM1 gangliosidosis, and sialic acid storage disease. It is important to note that this code is specifically used for qualitative analysis of multiple sugar molecules in a specimen, distinguishing it from code 84376, which is designated for the qualitative analysis of a single sugar substance.