If you are opting for higher SI, then based on your current health status, the company may ask you to undergo medical tests (only if required). For same SI, the company shouldn't ask for fresh medicals again unless the individual plan is different (better) from the floater plan.

Dear Krishna

No , for same sum assured .

May be for enhanced sum assured .increases sum assured like a new policy and will be underwritten as per terms and conditions of insurance company.

Shailesh

Insurance Samadhan