Lab Tests Online
Lab Tests Online is organized by the American Association for Clinical Chemistry (AACC) and is a collaboration among professional societies representing the clinical laboratory community. All the information a patient or caregiver needs to understand clinical lab tests is available here
Understanding Diagnostic Tests
Describes common diagnostic tests that you may experience and explains how to prepare for each test, what happens when the test is performed, what risks are associated, and what you should do after the test is completed. (Harvard Medical School)
When Getting Medical Tests
Information to help you when making decisions about medical tests. (Agency for Healthcare Research and Quality)