Many persons with chronic health conditions fail to take their medications as prescribed, resulting in declines in health and function. Objective: The purpose of this study was to perform a phase I feasibility study to understand if an integrated occupational therapy intervention could help people with chronic health conditions improve their adherence to medications. Method: Using a small-N design, we report single-subject analyses of the medication adherence, behavior counts, and perceptions of medication adherence of participants before and after either an occupational therapy intervention or standard of care intervention. We used a multiple baseline approach with inter-subject replication, and blinding.