Often when a person buys visitor insurance, he comes across a fear. Though, Insurance itself means a measure to mitigate and to be able to properly handle the risks and unexpected circumstances, but visitors suffering from conditions like diabetes, high blood pressure, heart-ailments etc. are concerned about the coverage of these health conditions. At the time of purchase of travel insurance, they want to make sure their plan covers treatment, prescription costs, lab tests etc. arising due to these health conditions which probably have existed from long before the day of insurance purchase.