Listed below are reasons due to which your claim may be denied-There are certain predetermined diseases that are not covered during the waiting period. Whether intentional or unintentional, if the health insurance finds that you have provided incorrect facts about your health conditions or you have hidden any important details, your claim will be denied.A claim made even a day after the policy expires will not be accepted. Not informing the health insurance company about the hospitalisation/treatment within the specified time limits, can lead to a claim rejectionMisinformation about exclusions can lead to a rejected claim. Read the company's list of exclusions carefully. Most typical exclusions are:Injury under intoxicationPre-existing illnessesSelf -inflicted injuries