https://webcache.googleusercontent....virgin-islands.html+&cd=1&hl=en&ct=clnk&gl=th
Here's one answer of "Yes" - can't find the original Cove thread, but the cached version seems okay. That thread points out that the regulations regarding the language of labeling specifically mention Puerto Rico and that devices there may be labeled in Spanish only.
The legal rationale is as follows:
1. The U.S. Constitution states that Federal law is the supreme law of the land and any state or territorial law that conflicts with federal law is invalid.
2. Along the line of the cases interpreting this clause, courts have held that where a federal law (including regulations) that thoroughly regulate an area or the law says that the feds have the exclusive ability to regulate it (such as medical devices), then states or territories cannot regulate them. This is called Federal Preemption.
3. So just as states cannot regulate medical devices, neither can Puerto Rico, which is under federal jurisdiction.
So the legal theory matches the Cove thread and generally accepted result that - Yes - that as far as the feds are concerned your device can be marketed in all 50 states, including Puerto Rico and the U.S. Virgin Islands ... and Guam. But the Marshall Islands ... no idea.
But this doesn't fully clarify the question of whether there are additional incidental requirements - for example a Prop-65-like thing.