When it's time for medical care, where do you go? The doctor's office? An urgent care clinic? Or the nearest hospital? As many as 1 in 3 Americans sought care in an ER in the past two years, according to a recent poll by NPR, the Robert Wood Johnson Foundation and the Harvard T. H. Chan School of Public Health. That relatively high frequency may be a matter of convenience, even though many in the poll also report frustration with the cost and quality of care they received in an ER.