Browse comprehensive information on 18 medical tests — including purpose, preparation, costs, and normal ranges.
A blood glucose test measures the amount of glucose (sugar) in the blood. It's used to diagnose and monitor diabetes and...
The C-reactive protein (CRP) test measures the level of CRP in the blood. CRP is a protein produced by the liver that ri...
A chest X-ray produces images of the heart, lungs, blood vessels, airways, and bones of the chest and spine. It's one of...
A colonoscopy is an exam used to detect changes or abnormalities in the large intestine (colon) and rectum. It's the gol...
A complete blood count (CBC) measures several components and features of the blood, including red blood cells, white blo...
A comprehensive metabolic panel (CMP) is a blood test that measures sugar level, electrolytes, kidney function, and live...
COVID-19 tests detect current or past infection with the SARS-CoV-2 virus. Types include PCR tests, rapid antigen tests,...
An electrocardiogram (ECG or EKG) records the electrical activity of the heart. It can detect heart attacks, arrhythmias...
The hemoglobin A1c test measures your average blood sugar level over the past 2-3 months. It's the primary test used to ...
HIV tests detect human immunodeficiency virus infection by looking for antibodies, antigens, or the virus itself in bloo...
Iron studies (also called an iron panel) are a group of blood tests that measure different substances to evaluate the am...
A lipid panel is a blood test that measures fats and fatty substances (lipids) used as a source of energy. It includes t...
Liver function tests (LFTs) are blood tests that measure different enzymes, proteins, and substances made by the liver t...
A mammogram is an X-ray image of the breast used to screen for breast cancer. It can detect tumors that are too small to...
The prostate-specific antigen (PSA) test is a blood test used primarily to screen for prostate cancer. PSA is a protein ...
A thyroid panel includes tests that measure TSH, T3, and T4 levels to evaluate thyroid function. It helps diagnose hypot...
A urinalysis is a test of your urine that checks for signs of disease, infection, or other health problems by examining ...
A vitamin D test measures the level of 25-hydroxyvitamin D in the blood. Vitamin D deficiency is extremely common and li...