Hi I have the card and wondering do I have to notify AMEX that I am going to USA in a month?
and I want to utilise the travel insurance
or is it all set and ready to go
They should already know - that is if you are hoping to use the included travel insurance.
To have it apply you have to satisfy the T&Cs which includes purchasing the tickets...
So AMEX automatically knows if you have complied with the T&Cs or rather they do in the future if you need to claim.
As a precaution to 'travel cc fraud' I do contact AMEX and let them know that I will be travelling via XYZ and do/do not intend to spend much on the card anywhere but ABC to guard against the card getting copied while on a stop over/transit stop. Helps protect you against an unfriendly issuer...
A too long period ago when talking with a senior exec running the world's largest issuer - he commented that unexpected amounts overseas are normally quite easy for any cc issuer/processor to notice and query.
It is simple enough to verify whether it is a known medical/Govt/travel service vs a cash advance/out-of-character purchase etc. Often if it is one of the generally legitimate reasons - the card holder will have already rung the associated Travel Insurance company who then flags it with the issuer.