CPT® Code 86376

The CPT® Code 86376 refers to a laboratory test that detects the presence of microsomal antibodies, which are specific antibodies produced by the immune system in response to damage in certain organs, particularly the thyroid and liver-kidney. Microsomes are small structures within cells that play a crucial role in various metabolic processes. When cells in the thyroid, liver, or kidneys are damaged, these microsomes are released into the bloodstream, prompting the immune system to generate antibodies against them. This blood test is essential for diagnosing various conditions related to these organs. For instance, when testing for thyroid microsomal antibodies, the results can help confirm disorders such as Hashimoto's thyroiditis, a condition where the immune system attacks the thyroid gland, leading to hypothyroidism, as well as other thyroid-related issues like cancer or nontoxic nodular goiter. In the case of liver-kidney microsome antibodies, the test employs semiquantitative indirect fluorescence or semiquantitative enzyme-linked immunosorbent assay (ELISA) techniques to assess potential cell damage, particularly in autoimmune hepatitis type 2 (AIH-2). The procedure involves obtaining a blood sample through venipuncture, which is a separate reportable service, and analyzing it for the presence of these antibodies, thereby providing critical information for the diagnosis and management of autoimmune conditions affecting these organs.