How long after CoolSculpting on abdomen should I wait to have a Venus Legacy on the same area?

Hello and thank you for your question. You can do the venus one week after coolsculpting on the abdomen to promote lymphatic drainage.

Typically we recommend our patients start their venus treatments 2 weeks post coolsculpt. This gives time for any swelling or tenderness in the area to dissipate. After two weeks, Venus is a wonderful treatment to help break up all the frozen fat cells and promote lymphatic drainage. 

Most people wait 6-12 weeks before getting a different treatment. In addition to Coolsculpting and Venus Legacy, I recommend adding Vanquish, Exilis Ultra for skin tightening and with Z wave/Cellutone for skin smoothing to improve your final results. In our office, we perform Coolsculpting with Vanquish for a "Fire and Ice" Treatment and are getting great outcomes. See an expert. Best, Dr. Emer

You can have Venus Legacy immediately after Coolsculpting. Actually the heat from the Venus can help to speed up the Coolsculpting results. My suggestion is not to use the suction mode on the Venus if you decide to have it right after the Coolsculpting simply because the skin can be sensitive.
It is perfectly fine to wait a week or so to have the Venus if you feel it might be better for you.