Background: One contributor to the health inequalities that people with an intellectual disability face is failure to identify their intellectual disability. The Learning Disability Screening Questionnaire (LDSQ) can identify adults who are likely to have an intellectual disability, but little is known about its impact. Methods: A modified Delphi approach (literature search, interviews with staff and those using services [n = 28], and completion of an online survey by professionals [n = 29]) was used to develop a framework to evaluate the impact of the LDSQ. Results: Items endorsed by 60% or more of respondents (9/18) were included in the final framework. These all related to benefits of the LDSQ, including identifying people not previously known to have an intellectual disability; helping prioritize diagnostic assessment; informing support needs; and helping increase wellbeing and life chances. Conclusion: The LDSQ may offer one way of helping address the health inequalities that people with an intellectual disability face.