A new taxonomy is proposed for defining the interests of stakeholders' representatives in health research: the case of guideline development.

Competing Interests: Declaration of Competing Interest TWC declares contracts with CDC NIOSH to evaluate a research program with a stakeholder engagement component, with NY AIDS Bureau and HRSA to develop measures for engagement in HIV care quality, with PCORI to identify measures of engagement, with Innovation and Value Initiative to develop an approach for patient involvement in HTA, and with PhRMA to evaluate equity and inclusion in HTA. He has received an award and subsequent contract by PhRMA foundation for proposing a new approach for engaging patient in HTA. He serves as a director of community and stakeholder engagement for the Tufts CTSI (NIH/NCATS). He receives royalties by Springer International Publishing for serving as editor of a volume: “Broadly Engaged Team Science in Clinical and Translational Research.” He received a payment by Virginia Commonwealth University Wright Center for reviewing a grant proposal and anticipates payments by Henry Stewart Talks in 2022-23 for delivering four to six online lectures. PhRMA supported his attendance at ISPOR 22. All other authors have no competing interests to declare.