Medical errors are mistakes or failure of a planned action in health care delivery that could have been avoided. They can occur in any health care delivery sitting such as hospitals, clinics, surgery centers, physician’s offices, nursing homes, and pharmacies, or at home. They may also occur as a result of the use of a product or execution of a system. Errors may entail medicine, surgery, diagnosis, equipment, or laboratories reports. Errors are frequently caused by inadequate communication. Medical errors may vary in their effect from a simple injury or death.