As folk says here are recommended few,
Cons
Long waiting for appointments. Sometimes, it takes about one and half months. If patient requires dialysis it might take a while to get appointment for that. Apparently, for emergency treatment requirements like that this might not be suitable.
A few are recommended by a friend in Bangladesh.
Manipal Hospital There are chain of hospital branches for this one. For starter, the main one can be good.
Mazumdar Shaw Medical Center, Bommasandra
And other more commercial and expensive hospitals to seek opinions.
The City is busy. It suffers high traffic situations. Hence, be prepared to spend time on the road while travelling to places.
A good cell phone carrier helps. It's easy to register a SIM card with one of the carriers to make communication easier to tmake cals hospitls or indian contacts.
few points,
Recommendation from a friend form Mumbai I would bet on Hospitals on Delhi and Mumbai.
My understanding is that Delhi have AIIMS and Mumbai in general have good hospitals. ref, Parth
[to do: move to another article later]
Hospitals in Thailand
Hospitals in Thailand