Can you have Ultherapy done after receiving fillers?

It really depends on where the fillers are injected rather than the timing of which ones go first. Remember that Ultherapy can go as deep as 4.5 mm under the skin. That is well past the deep dermis and into your fatty tissues. Also, Ultherapy and fillers are generally trying to accomplish opposite things. Fillers are volumizing, while Ultherapy is atrophy-ing. Therefore, fillers and Ultherapy are usually applied to very different areas. Best to see a board certified doctor who is very experienced with both. 

An Ultherapy treatment will not affect the longevity of your dermal filler. In my experience, a combination of Ultherapy and dermal fillers offers great results. Consult
with your doctor before scheduling any treatment.

If you currently have fillers you can still have the Ultherapy treatment done without any effect on the fillers or their longevity. The combination of Ultherapy with fillers will be complementary and look great.