Yes you can. Go to dji com and hit the drop down menu then look for “support” and then you should see a box saying “dji care” on the screen. It will load to a new screen and give you a few options “buy now” “dji care activation code” and remaining coverage amount” click on the “buy now”. You should then see a list of all the drones they offer and looks for the one you have. Then click buy it now and it will ask for your S/N.
You have to do this within 48 hours after activating your drone via the app (I believe it’s the app)
I hope this helps you!