Many people are unaware of what pre-existing condition coverage is and how it can benefit them. Pre-existing condition coverage is insurance that will help to financially protect your parents if they need medical treatment while traveling. It will help to cover the costs of any medical bills that may arise as a result of a pre-existing condition. When looking for travel insurance, it is important to ensure that your parents are covered for any pre-existing conditions they may have. Make sure to read the policy carefully to determine what is and is not covered.