A medical centre is an establishment housing a group of doctors offering healthcare services from a single premises. Medical centres differ in size and type. Some may offer doctors in general practice or another area such as plastic surgery, oncology, radiology, dermatology, gastroenterology etc., or a combination of both general practitioners and specialists. Public hospitals will often have a medical centre close nearby, where doctors from these public hospitals can also see patients privately. These doctors are known as specialists, for example cardiologists and surgeons.