In order to understand acute onset of pre-existing conditions, you need to first understand the difference between a pre-existing condition and an acute onset of a pre-existing condition. Definitions may vary by plan, and it is always recommended to review individual plan definitions in the Description of Coverage for specific details.
A pre-existing condition is defined as an injury, illness, sickness, disease, or other physical, medical, mental, or nervous condition, disorder or ailment (whether known or unknown) that, with reasonable medical certainty, existed at the time of application or within a period of time immediately preceding the travel insurance plans certificate effective date. It is important to note that most travel insurance policies do not provide coverage for pre-existing conditions.
An acute onset of a pre-existing condition is defined as a sudden and unexpected recurrence of a pre-existing condition that occurs spontaneously and without advance warning (either in the form of physician recommendations or symptoms), is of short duration, is rapidly progressive and requires immediate medical attention.
The above definition does not cover all the aspects of an acute onset of a pre-existing condition. Many insurance buyers believe the misconception that any sudden manifestation of symptoms is covered under acute onset of pre-existing conditions coverage, when in fact the occurrence must meet specific guidelines to be considered an acute onset and many of these guidelines vary by plan.
For example, if a medical condition like cancer has existed in a person for some time before the insurance policy was bought, and was diagnosed at the time the person had a medical incident, he or she may not qualify for acute onset of pre-existing condition coverage.
Keep in mind that travel insurance is designed to provide coverage for emergencies, accidents and any new and unexpected injury or illness that may occur while abroad. It is not meant to replace the domestic or preventative care the insured would receive at home for existing conditions. If the traveler is in poor health or at high risk for a medical event, it is likely best for them to refrain from travel.
However, it is important to note that just because a condition is under control does not mean coverage is guaranteed, and every individual situation is different.