Lab testing is required in many circumstances to diagnose, track, and treat medical conditions. Lab testing may be required during:   • Routine check-ups - Used to monitor general health and spot early signs of disease, lab tests are a common component of a regular check-up. • Diagnosis - Lab tests are used to diagnose conditions like infections, cancers, and chronic conditions. • Monitoring conditions - Lab tests are used to track the development of chronic medical conditions, such as diabetes or kidney disease. • Treatment - The success of drugs or other therapies like chemotherapy or immunotherapy can be observed with lab testing. • Pre-operative assessment - Laboratory tests are useful for assessing a patient's general health and spotting potential risks before surgery.