Check medical history before accepting the application

I know of a few cases where the insurance company rejected a medical claim on the grounds of alleged non-disclosure of a past medical condition. Usually, the insured was not aware about the medical history or the need to disclose it. The medical bills can come to several tens or thousands of dollars.

I asked this question in The Wisdom of the Crowd - Should MAS disallow insurers from rejecting claims due to alleged non-disclosure of past medical history?

Here are the votes:
a) 58% said that the insurer should check on the medical history before accepting the application, rather than at the time of processing the claim.
b) 15% said the the insured is not aware of the need to disclose the medical history.
c) 13% said that the insurance policy should have an indisputability clause which bars the insurance company from disputing the claim on the grounds of non-disclosure after 1 year.
d) 8% said that the agent does not do a good job in asking for this information in the application.
e) 8% said that the current practice is satisfactory. The consumers should be responsible to disclose the past medical history.

A total of 92% said that the current practice should be changed.

You can view the breakdown of the votes in
http://www.wisdomofthecrowd.sg/chart.aspx?ID=408