Patient-reported financial barriers to adherence to treatment in neurology Lidia MVR Moura,1 Eli L Schwamm,1 Valdery Moura Junior,1 Michael P Seitz,1 Daniel B Hoch,1 John Hsu,2,3 Lee H Schwamm1 1Department of Neurology, 2Mongan Institute for Health Policy, Massachusetts General Hospital, 3Department of Medicine and Department of Health Care Policy, Harvard Medical School, Boston, MA, USA Objective: Many effective medical therapies are available for treating neurological diseases, but these therapies tend to be expensive and adherence is critical to their effectiveness. We used patient-reported data to examine the frequency and determinants of financial barriers to medication adherence among individuals treated for neurological disorders. Patients and methods: Patients completed cross-sectional surveys on iPads as part of routine outpatient care in a neurology clinic. Survey responses from a 3-month period were collected and merged with administrative sources of demographic and clinical information (eg, insurance type). We explored the association between patient characteristics and patient-reported failure to refill prescription medication due to cost in the previous 12 months, termed here as “nonadherence”. Results: The population studied comprised 6075 adults who were presented between July and September 2015 for outpatient neurology appointments. The mean age of participants was 56 (standard deviation: 18) years, and 1613 (54%) were females. The patients who participated in the surveys (2992, 49%) were comparable to nonparticipants with respect to gender and ethnicity but more often identified English as their preferred language (94% vs 6%, p<0.01). Among respondents, 9.8%