This paper discusses the various ways in which artificial intelligence has been used in the medical sector and how it can improve the efficiency of healthcare services. It explores the use of A.I in expanding, sharpening, and improving the ability of doctors to undertake an activity. The paper also discusses the use of brain-computer interfaces, improving the quality of data obtained from radiology tools, clinical documentation, drug resistance, and the use of smart devices. The paper concludes by discussing the controversies surrounding the use of artificial intelligence in healthcare.