Help me to purchase a health policy

I want to purchase a health policy for my parents. My dad is 62 years old and my mom is 55 years old. Which policy would be best?

Need a good network of hospitals, Minimum coverage needed is 10Lakh per head. No claim bonus of 5L per year. Need a policy that has good service and claim settlement.

My dad: smoker, drinker, no diseases My mom: have diabetes, thyroid