Is an abnormal body structure like scoliosis causing pain enough for insurance covered abdominoplasty?

I highly doubt that your insurance company will cover this procedure despite their language you mentioned. Even if somehow it was initially approved, that doesn't guarantee payment. I have been involved in cases where the insurance companies said "yes" in the predetermination phase, then denied the procedure postoperatively, leaving the patient with a large unexpected bill from the hospital.

Tummy tuck is not an operation which is covered by insurance.  Neither the curvature of your spine nor the pain will not be addressed by tummy tuck.  

Insurance companies consider tummy tucks cosmetic in nature and these will not be covered.Kenneth Hughes, MDLos Angeles, CA

Many patients who undergo abdominoplasty report that back pain has improved in the wake of the operation. Nevertheless, this is not considered a standard treatment for back pain per se. I doubt insurance will cover it.

The insurance company will not cover a tummy tuck. They write all kinds of garbage on their sites making it sound like they are really out there to provide care for the patients. Their only interest is to make money and they make this by refusing care. Even if they authorize the procedure they will deny the payment after it is performed