Diagnostic tests are medical tests or procedures that are performed to confirm or exclude the presence of a disease or medical condition. These tests help healthcare providers make accurate diagnoses and determine the most appropriate course of treatment for their patients. Diagnostic tests can range from simple blood tests and imaging scans to more invasive procedures like biopsies and endoscopies. Some common types of diagnostic tests include X-rays, MRIs, CT scans, blood tests, biopsy, ultrasound, and electrocardiograms (ECGs). These tests are essential in identifying a wide range of medical conditions, from infections and inflammatory diseases to cancer and cardiovascular disorders. Ultimately, diagnostic tests play a crucial role in the early detection and management of various health issues, ultimately leading to better patient outcomes.