Is there a certain amount of fat percentage you need before considering CoolSculpting?

When CoolSculpting first came out, the applicator used suction to pull the fat into the treatment area and freeze it. So, therefore, we generally recommend you have some “pinchable” fat — about an inch or two of extra fat.
However, Zeltiq came out with CoolAdvantage, which is a flat cooling panel that treats the thighs and other flatter areas that have excess fat, but perhaps not enough to “pinch.” From your description, it sounds like you might be an ideal candidate for CoolSculpting with either the original applicator or CoolAdvantage. Please find a board-certified dermatologist for an in-person consult so you can know for sure if you would respond well to body contouring with CoolSculpting. 

Body sculpting can be achieved with Coolsculpting alone, or in
combination with tissue tightening and skin toning therapies such as
Liposuction, Exilis Multiplane Tissue Tightening, Venus Legacy, Hidef
Fractional laser, and the Brazilian Cellulite Treatment with Stretch
Mark Laser. I would use Coolsculpting to address excess fat deposits as
it is non-invasive tool that can re-establish body proportions to
improve your body silhouette. 
We specialize in Hidef Liposuction options and Coolsculpting in our office, depending on a carefully curated protocol.

Best, 
Dr. Karamanoukian
Realself100 Surgeon

If you have unwanted fat that you can pinch, then you are most likely a good candidate for Coolsculpting. It tends to work particularly well for a "muffin top" as you described. See someone with extensive experience. I feel you ultimately get a better result from someone that has a lot of experience.Andrew Campbell, M.D.
Quintessa Aesthetic Centers