This article provides a list of autoimmune diseases. These conditions, where the body's immune system mistakenly attacks its own cells, affect a range of organs and systems within the body. Each disorder is listed with the primary organ or body part that it affects and the associated autoantibodies that are typically found in people diagnosed with the condition. Each disorder is also categorized by its acceptance as an autoimmune condition into four levels: confirmed, probable, possible, and uncertain. This classification is based on the current scientific consensus and reflects the level of evidence supporting the autoimmune nature of the disorder. Lastly, the prevalence rate, specifically in the United States, is included to give a sense of how common each disorder is within the population.