The Autoimmune Disease Diagnosis Market is expected to grow from USD 4.1 billion in 2020 to USD 8.3 billion by 2030, with a CAGR of 8.9% over the forecast period. Autoimmune diseases occur when the immune system mistakenly attacks healthy body cells, mistaking them for foreign invaders. These conditions can target specific organs, like Type 1 diabetes affecting the pancreas, or impact the entire body, such as systemic lupus erythematosus (SLE). The market's growth is driven by the rising prevalence of autoimmune diseases, increased awareness, and advancements in research, leading to better diagnosis and treatment options.