80d deduction for mutliple mediclaim policies

Hi,

I have employer provided family cover mediclaim policy where I + spouse + children + father  are covered. My employer pays premium for basic cover for me + spouse + children. Whereas I contributed premium for my father. Thus total premium paid is Rs 10150. This qualifies for 80D deduction. My father is a senior citizen (69 yrs old).

Now I want to buy a new mediclaim policy (in addition to employer provided policy), which will cover me + spouse + children. So if I want to keep my premium within 80D limits, should I consider Rs. 15000 as upper limit for 80D or Rs. 20000?

Regards,

Naishadh