Patients and public are important stakeholders in health technology assessment but the level of involvement is low - a call to action.

Background: Health technology assessment (HTA) agencies have an important role in the evaluation and approval of new technologies. They determine their value within a health system so to promote equitable, quality care with available healthcare resources. Many HTA agencies have some mechanism for involving patients in their processes, but there is great variability and an absence of comprehensive, robust practices for involvement. The accelerating pace of medical innovation creates a need to improve the depth and breadth of patient involvement in the HTA process.

Main Body: In this 'Call to action', we present ideas from three HTA expert commentaries calling for collaborative learning and to share innovative ideas for changes in HTA. We also draw on examples of HTA agencies creatively pursuing this goal. We propose a 'Call to action' for HTA stakeholders to undertake serious dialogue with patient advocates aimed at creating shared goals. HTA agencies can use these goals to ensure meaningful patient involvement at every step of the HTA process. Five elements are explored. In 'Recognizing the value of shared purpose', we highlight examples of HTA agencies that have patients working in partnership with medical practitioners and HTA staff. Results include improved processes that instil confidence. 'Committing to patient involvement as part of HTA culture' highlights several initiatives aimed at changes in HTA organisational culture to be more inclusive of patients. In 'Aligning patient and HTA goals' we cite work in Belgium and New Zealand which places a greater emphasis on quality of life rather than life expectancy and cost-effectiveness. By 'Integrating patient involvement at every step of the HTA process' patients can make vital contributions at every stage of the HTA process. We provide two examples of where HTA agencies have successfully involved patients early in the process in order to broaden the scope of evaluations. 'Developing a common language and working together' can support transformative dialogue through 'unified language'.

Conclusion: The authors of this commentary ask that agencies and stakeholders involved in HTA take up this call to work together for visionary and transformative elevation of the voice of patients in HTA worldwide.