is there any policy that covers pre existing diseases.

If bypass surgery is already done and after 4 years If I want to get a mediclaim for my father is there any policy with extra payment or copayment ?

You have not provided names of such companies I tried to contact local dealer and everyone else but could not locate. My requirement is pretty simple I can bear portion of cost when root cause is existing disease however when it goes beyond I need some bracket to support. As some medical condition or so common and overseas its very expensive. So assume condition cost 1 Lac in in India and overs eases 10Lacs. So atleast I can be covered 6-8 Lacs in such situation with some additional premium