Possible: although it's part of the body shell, the body shell is only a collection of panels welded together.
Impractical: you'll need a new panel, a jig to hold the body in alignment while you remove the bent panel, access to a mig, spot or tig welder, spray equipment and the requisite skills. It's a big, big job.
A more possible alternative is to gain access to the panel from the rear and carefully push the ding out. If you can't get to the rear, you may be able to use a suction pad to pull the panel into shape. Failing that, you can drill a hole or two and use a self tapping screw attached to a slide hammer.
Some filler is almost cartain to be required and you'll need to be carefull not to stretch the panel by pulling or pushing too hard.
Why not file an insurance claim?