Is there a BMI needed to qualify for a tummy tuck?

Not really... Bmi is not a primary issue in tummy tuck surgery except that it not be too high. The surgery is a more a matter of geometry and medical fitness. These limits on these issues are often a matter of philosophy.
No, but. Are you asking if insurance will pay for a tummy tuck at a certain bmi? If so the answer is definitely "no." insurance never pays for a tummy tuck. If you mean, "can i find a plastic surgeon to do a tummy tuck if my bmi is really high?, " the answer is "possibly" but it is a really bad idea. As dr. Kinsley stated, the best results are obtained when a tummy tuck is performed after weight loss.
No. The closer you are to your ideal body weight the better your results will be. Obviously if your bmi is too high, you will need to lose weight prior to your tummy tuck.
No. tummy tuck is not covered by insurance so there's no qualifying. If your BMI is too high the procedure is less safe.
Ideally, >35. If your BMI is greater than 35, you have an increased risk of surgical complications. Patients who come to me with a BMI greater than 35 are assessed on a case by case basis. Patients with a BMI over are not a candidate for elective surgery.
Preferable under 30. For most cosmetic procedures, it is preferable that your bmi be less than 30. Above 30 there is a potential increased risk of complications.
LESS than 30. A bmi over 30 places you at greater overall risk for any surgery due to the desgination as being obese. Risks of impaired wound healing and blood clots are elevated in individuals with an elevated bmi.
Not 2 low not 2 high. Yes your bmi optimally should be below 30 and above 18. However great variation exists and exeptions do occur.
No. There is not a bmi necessary to qualify for a tummy tuck. In overweight or mildly obese patients complications are increased. It is not it a good procedure for a moderate or severely obese patients.
Yes. Though there is not universal agreement on what the weight limit should be, plastic surgeons do agree that a tummy tuck is not a subsitute for diet and exercise. More importantly, the risk of complications from anesthesia and surgery is higher in overweight patients. A BMI of around 30 is a commonly used criterion for safe elective surgery.
No. Bmi is used by some to measure the relative body mass. It is not a scientific measurement, as it cannot take into account the actual lean body mass nor the % body fat. Doing body composition analysis is much more accurate, and can help your doctor guide you with diet/exercise and the type/extent of surgery to consider.
Usually. There's some variability here but most surgeons prefer a BMI of less than 30 for body contouring procedures. Body contouring is not weight loss surgery and the higher the BMI the higher risk of perioperative complications. Also, results are undoubtedly better in lower BMI patients who have mostly excess skin as opposed to excess fat.