A friend of mine skipped declaring a controlled but ongoing heart condition on her travel insurance, assuming it was “under control” and therefore irrelevant. She ended up in an Australian hospital with an unrelated injury, and the insurer still delayed her claim for weeks while investigating whether the undisclosed condition had any bearing on it. It hadn’t, but the non-disclosure itself became the problem.
Quick answer: Under Australian insurance law, you must disclose any pre-existing medical condition when buying travel insurance, even one that’s well-managed or unrelated to your claim. Failing to disclose can void your entire policy, not just the part relating to that condition, leaving you exposed to the full cost of any medical treatment or claim.
Why Disclosure Matters More Than People Think
Under the Insurance Contracts Act 1984, you have a legal duty to disclose relevant information when taking out a policy, and insurers rely on that information to decide whether to cover you, at what price, and under what conditions. If you don’t disclose a pre-existing condition and later make any claim, even one seemingly unrelated to that condition, the insurer can investigate the non-disclosure itself and potentially deny the claim or void the policy entirely.
What Actually Counts as “Pre-Existing”
Most insurers define a pre-existing condition broadly, generally any diagnosed illness, ongoing medication, previous surgery, or condition you were aware of before buying the policy, whether or not you’ve had recent treatment for it. This commonly includes:
- Diagnosed chronic conditions (diabetes, heart disease, asthma, hypertension)
- Mental health conditions, including past diagnoses even if currently well-managed
- Cancer, including conditions in remission
- Previous surgeries or ongoing treatments
- Regular prescribed medications
- Pregnancy, in some cases, depending on the stage
Every insurer defines this list slightly differently, always check your specific Product Disclosure Statement (PDS) rather than assuming.
How the Declaration Process Usually Works
Most Australian insurers run an online medical assessment during purchase, you list your conditions and medications, and the system (or an underwriter) decides whether to cover them, exclude them, or charge an additional premium. You’ll typically receive an approval number and any special conditions listed on your Certificate of Insurance, keep this document, it’s what you’ll reference if you ever need to make a claim.
Not Every Condition Gets Automatically Covered
Some conditions are automatically covered under standard policies, others require the extra assessment step, and some conditions simply aren’t covered by mainstream insurers at all. For more serious or complex pre-existing conditions, specialist providers exist that can offer cover where standard policies won’t, generally at a higher premium, but it’s almost always a better financial decision than travelling uninsured for that condition given the cost of overseas or unexpected medical treatment.
What Happens If Your Condition Changes Mid-Trip
If a declared condition worsens or a new symptom develops after you’ve already left home, most policies won’t let you add or update cover for that change retroactively, it may end up excluded regardless of your original declaration. This is worth knowing if you’re managing an ongoing condition and considering travel during a period where it might be unstable.
A Reciprocal Health Agreement Doesn’t Replace Travel Insurance
If you’re coming from or travelling to a country with a Reciprocal Health Care Agreement with Australia, that only covers basic access to public healthcare, it does not cover pre-existing conditions, medical evacuation, or the many other costs travel insurance is designed for. Don’t treat an RHCA as a substitute for proper cover.
Final Thoughts
The short-term discomfort of declaring a condition, and possibly paying a bit more for it, is nothing compared to the risk of a denied claim or voided policy during an actual medical emergency. Declare everything you’re aware of, read the resulting Certificate of Insurance carefully, and if you’re unsure whether something counts, ask the insurer directly before you travel rather than guessing. For a broader look at travel insurance basics, see our guide on travel insurance for visiting Australia.
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*This article is for general informational purposes only and does not constitute financial, insurance, or medical advice. Always review your specific policy’s Product Disclosure Statement before purchasing.*