Upvote:5
Not sure why this was down-voted, I finally got the answer figured out, but it took a non-trivial amount of research and work, so I'm posting here in case someone else wants to know this.
Here is the answer
So the overall answer is "depends on what US state you are coming from AND which German state you are going to". In my case, Massachusetts to Bavaria, I do NOT need to quarantine. That has been confirmed by the local health office (Gesundheitsamt) in my target town. No quarantine needed but I'm supposed to register with them on arrival.