so i don't know about the process of studying in india or the philippines. but if you plan to come back to the US, you will have to take USMLE Step I and II and then apply for residencies here before you can practice medicine in the US. You may know that medical graduates from abroad have a huge disadvantage in residency placements. however, if you were to attend medschool in the US, you will not be disadvantaged (regardless of your citizenship).

Very few US medschools accept international students but they do exist and it's possible to get fiancial aid for attendance (loans and also scholarships) as well.

so, the trade off is cheaper tuition and less competitive entrance (not in india, of course, which is very competitive) vs a disadvantage in residency placement. i do not know all of your preferences but if you have a competitive academic and extra-curricular record, you may want to try applying in the US, which may be more competitive and expensive (not if you can secure scholarships) but will give you a strong advantage if you want to specialize and practice in the US.