No — trauma insurance does not pay for conditions diagnosed before the policy's effective start date. This is the standard pre-existing condition rule across all retail trauma cover. Specifically, you cannot claim for: a condition you had been formally diagnosed with before applying, a condition for which you were experiencing symptoms or receiving treatment when you applied, or a condition you should reasonably have suspected based on your medical history. Most policies also include a 90-day qualifying period (sometimes called 'waiting period' or 'survival period') for cancer, heart attack, and stroke — claims for those three conditions diagnosed in the first 90 days after policy start are generally not paid, regardless of whether the condition was pre-existing. The 90-day rule is intended to discourage applications timed against a known impending diagnosis. Pre-existing conditions disclosed at application may be specifically excluded from cover (a standard exclusion), or accepted with a premium loading depending on severity, time elapsed, and current state. Non-disclosure of a pre-existing condition is one of the leading causes of declined trauma claims — under the Insurance Contracts Act, non-disclosure of a material condition gives the insurer grounds to void the policy or refuse the specific claim. The 'duty to take reasonable care not to make a misrepresentation' (post-October 2021) requires honest, complete answers to the questions asked.