As adults with type 2 diabetes age, they are increasingly vulnerable to treatment-related hypoglycemia and its related complications (including hospitalization and death). This study proposes to evaluate, in a randomized clinical trial, a strategy of expanded advance care planning to support older adults in value-aligned re-assessment of diabetes treatment regimens with their primary care team. If the aims of this project are achieved and incidence of clinically-significant hypoglycemia is reduced, this Prepare for Your Diabetes web-based patient educational care strategy could be scaled and applied in a wide variety of healthcare settings and chronic conditions in which evolving risks, benefits, and consequences of treatment require re-assessment with age.