A 513(g) asks FDA how it classifies a product and what rules apply. It costs a user fee and takes about 60 days, so it pays to know when it's the right tool.
A screening aid, not a determination. The answer follows FDA's published guidance and cites it, but only FDA decides, through a Pre-Sub, a 513(g) or the submission itself. Confirm with FDA or a qualified regulatory professional. Fees and review goals are planning figures. Nothing you answer is saved.
513(g) requests in plain terms and Pre-Subs in plain terms.
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