CPT® Code 86800

The CPT® Code 86800 refers to the laboratory test for measuring thyroglobulin antibodies. Thyroglobulin (Tg) is a specific protein produced by the thyroid gland, playing a crucial role in the synthesis, storage, and release of thyroid hormones. Under normal circumstances, Tg is not present in the bloodstream; however, it can enter systemic circulation when thyroid follicles are compromised due to various factors such as inflammation, hemorrhage, or abnormal growth patterns. When Tg is released into the bloodstream, the immune system may recognize it as a foreign substance, leading to the formation of auto-antibodies that specifically target this protein. The thyroglobulin antibody test is utilized either independently or in conjunction with other diagnostic tests to identify autoimmune thyroid diseases. Additionally, it serves to assess the reliability of Tg results in patients diagnosed with follicular-cell derived thyroid carcinoma, where accurate measurement is critical for effective management. The test is performed by obtaining a blood sample through venipuncture, which is reported separately, and the serum is analyzed using a quantitative chemiluminescent immunoassay method, ensuring precise measurement of the thyroglobulin antibodies present in the sample.