here are some sites that i have found...
State laws on insurance coverage for bariatric sur... [surg Obes Relat Dis. 2005 Jul-Aug] - PubMed result
Insurance Coverage | Bariatric Surgery and Weight Loss Services | St. Francis Hospital, Indianapolis
Countervailing factors seem nearly certain to boost the number of weight loss surgeries during 2004, however. Legislatures in several states are known to be considering bills that would mandate coverage for obesity surgery. These are Illinois and Ohio. If laws are passed there, they would join the ranks of six states--Louisiana, Virginia, West Virginia, Georgia, Maryland, and Indiana--that already have mandated such coverage. Passage of benefit mandates such as these states have makes it much harder for insurers to deny coverage to persons who fit the prerequisite profile, and to impose further restrictions on coverage for obesity surgery, but does little to address levels of reimbursement for the surgery to hospitals and doctors.
(from Liability insurance premiums on bariatric surgery soar. | Goliath Business News)
good luck and please post if anyone else finds more info!