PIONEER aims to improve healthcare pathways and treatments by understanding the symptoms and diseases people have when they become unwell: whether they had been to hospital or other healthcare providers before with the same problems; the time it took to make a diagnosis; and the care they received. PIONEER enhances public trust in health data use, working with patients, the public and other stakeholders to ensure that governance of data access is transparent and in the public interest. PIONEER is commited to communicating these principles effectively to improve understanding, and raise the profile of, the value of health data research. PIONEER is improving the quality and accuracy of acute care health data by: working with healthcare providers; providing a secure and scalable data environment; and placing patients and the public at the heart of all data sharing decisions. PIONEER brings scale and efficiency to dataset aggregation and curation of anonymised routinely collected data relevant to unplanned and acute health care. PIONEER makes these datasets discoverable and appropriately accessible to research organisations, NHS bodies and those who are conducting innovation activities which will lead to direct patient benefit. PIONEER provides an environment of cross-sector collaboration with strong relationships between patients, the public, NHS, industry and academic researchers to support research, development and innovation.