CPT® Code 86231

The CPT® Code 86231 refers to the laboratory test for endomysial antibodies (EMA), which are specific autoantibodies produced in response to gluten, a protein found in wheat, barley, rye, and oats. This test is primarily utilized in the diagnosis of celiac disease, also known as celiac sprue, a condition characterized by an abnormal immune reaction to gluten that leads to damage of the small intestine's villi. The presence of these antibodies indicates an immune response that can result in malabsorption of essential nutrients, leading to various gastrointestinal and systemic symptoms. Common symptoms associated with celiac disease include recurring abdominal pain, bloating, and changes in bowel habits such as chronic diarrhea or constipation, often accompanied by pale, foul-smelling stools. Patients may also experience weight loss and iron deficiency anemia due to nutrient malabsorption. The EMA test specifically targets immunoglobulin A (IgA) antibodies, which are highly specific for celiac disease. In cases where patients have IgA deficiency, testing for immunoglobulin G (IgG) antibodies may be performed as an alternative. The test is conducted using a venous blood sample, and the serum is analyzed through the indirect immunofluorescent antibody (IFA) technique, providing a qualitative result. It is important to note that the accuracy of the EMA test is contingent upon the patient’s continued consumption of gluten; if gluten is eliminated from the diet, the antibody response may not be present, leading to potentially misleading results. Additionally, the EMA test may be less sensitive in individuals with mild celiac disease or in children under the age of 2 years, and it is often used in conjunction with other immunoassays to confirm the diagnosis of celiac disease.