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Impact of health insurance status and a diagnosis of serious mental illness on whether chronically homeless individuals engage in primary care.

OBJECTIVES
We evaluated the impact of a diagnosis of serious mental illness on use of a primary care provider (vs the emergency department [ED]) as a source of care by people who were chronically homeless.


METHODS
We used data from 750 chronically homeless adults enrolled in the 11-site Collaborative Initiative to Help End Chronic Homelessness and identified demographic and clinical characteristics independently associated with using a primary care provider rather than an ED.


RESULTS
The factor most strongly associated with using the ED as a regular source of medical care was previous-year lack of health insurance. Despite high rates of serious mental illness, neither a diagnosis of serious mental illness nor increased severity of psychiatric symptoms was associated with such use.


CONCLUSIONS
Findings suggest that people who are chronically homeless and have chronic medical illness would be more likely to access care if they had health insurance. Individual states' deciding not to expand Medicaid coverage will likely have a tremendous impact on the health outcomes and health care costs associated with this and other vulnerable populations.