CPT® Code 87269

The CPT® Code 87269 refers to a laboratory test specifically designed for the detection of giardia antigen in fecal samples using an immunofluorescent technique. Giardia is a type of protozoan parasite that can be found in contaminated food and water sources, leading to gastrointestinal issues such as diarrhea, abdominal pain, and weight loss when ingested. The test utilizes a method known as immunofluorescence, which involves applying a fecal sample onto a microscope slide. This sample is then treated with a specialized detection reagent that contains antibodies specific to giardia, along with a counterstain to enhance visualization. When the slide is examined under a fluorescent microscope equipped with a filter system for fluorescein isothiocyanate, any giardia cysts present in the sample will fluoresce a bright green color due to the binding of the antibodies to the antigens on the cysts. The counterstain provides a contrasting dull orange-red background, making it easier to identify the giardia cysts. The test is considered particularly useful for symptomatic patients who do not have a recent travel history, as it has been shown to be more sensitive than other methods such as enzyme immunoassay (EIA) or direct examination of feces. A positive result indicates the presence of one or more giardia cysts in the sample, confirming the infection.