Lab Tests Online at testing.com will help you learn about specific clinical lab tests – what they are, why they’re ordered, how they’re used, what the results mean. Details on hundreds of lab tests. The site resulted from collaboration among professional societies representing the clinical laboratory community. The American Association for Clinical Chemistry (AACC) developed the original site in 2001 to help educate the public about lab testing. In January 2021, Lab Tests Online was acquired by OneCare Media. Updated 2022.