ISO 27799 is an international standard providing guidance on how best to protect the confidentiality, integrity and availability of personal health data for anyone working in the health sector or its unique operating environments.
Among the best practices called for in ISO 27799 are:
1ISO/IEC 27002, Second edition 2013-10-01: Information technology — Security techniques — Code of practice for information security controls. https://www.iso.org/standard/54533.html