It is a really good question! No idea in truth but I'd guess we can assume they cannot perform a role as a sports or team doctor to any USADA affiliated sport in the USA. Beyond that, no idea!
I don't know if that ban automatically extends worldwide courtesy of WADA affiliation, or whether it has to be ratified by WADA first. Equally, and in terms of cycling, I don't know if UCI have also (or can also) ban them, or it would necessarily follow from a WADA ban. My guess (and it is a guess) is that whilst each separate body has to formally make the judgement for themselves that is effectively a rubber stamping of the USADA decision.
One of the things I am really interested to see is just how UCI respond should Armstrong be sanctioned.