Mercy San Juan Hospital's Emergency Room staff is extremely knowledgable, and they really take a long time with each patient getting to the source of your injuries. Although this is great while you're being treated, be prepared to wait a VERY long time unless your doctor has called in ahead to let them know that you're coming. I went in there to be rehydrated this summer for hyperemesis and got in right away because my doctor had called. I was STILL in there for over seven hours!
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