MosaicDX (MOSAIC DIAGNOSTICS, formerly known as The Great Plains Laboratory) is a company that provides diagnostics for metabolic, mitochondrial, and environmental factors in chronic illnesses such as autism spectrum disorders, AD(H)D, fibromyalgia, and gastrointestinal and neuropsychiatric disorders. It provides various tests, including toxic chemical exposure, mold toxicity, metal toxicity, food allergies, essential fatty acids, glutathione levels, inflammation, etc.