A Hepatobiliary Scan, also known as a HIDA scan (Hepatobiliary Iminodiacetic Acid scan), is a nuclear medicine imaging test used to assess the health and function of the liver, gallbladder, bile ducts, and small intestine. It primarily helps in evaluating how well bile is produced by the liver, transported through the bile ducts, stored in the gallbladder, and released into the small intestine.