Many travel insurance plans have emergency medical and dental coverage. This benefit will either be primary or secondary coverage. Primary and secondary determines what insurance policy is first to receive a claim. If a traveler does not have a primary domestic health insurance plan, then a travel insurance plan with secondary coverage will be the first and only policy to receive the claim. There are some plans that require that the traveler already have a primary health insurance plan. When this is the case, on squaremouth.com, the traveler is prompted before being able to purchase a travel insurance policy with secondary medical coverage. Always refer to the certificate of insurance for details.