The health insurance premium that an individual has to pay is a function of two things - the age and the amount of sum insured desired. Therefore for an individual at 35-45 age category, the premium that will be applicable will be roughly Rs. 2500. When travelling overseas, you need to purchase overseas travel insurance. The regular health insurance that you otherwise buy in India is good for treatment in India only.
Buy overseas medical insurance
Or contact the seller
in section "Insurance of tourists"