Healthcare systems are increasingly reliant on digital technologies for managing patient information, raising concerns about the security and privacy of sensitive health data. Quantum cryptography offers a promising solution to enhance the security of health data transmission, ensuring privacy and confidentiality. This paper explores the principles of quantum cryptography and its application in healthcare systems to secure health data transmission. The role of quantum key distribution (QKD) in providing secure communication channels is examined, along with its advantages over classical encryption methods. Additionally, the paper discusses the challenges and future prospects of implementing quantum cryptography in healthcare systems, highlighting its potential to revolutionize data security in the healthcare industry.