Diabetes.
The more comorbidities you have will increase the chances that your insurance company will consider the procedure medically necessary.
http://www.legislature.state.oh.us/bills.cfm?ID=125_SB_41 will take you to Bill 41. This bill documents the standards that most insurance companies use as the benchmark.
With a BMI of 60 and your list of comorbidities, you shouldn't have a problem unless you insurance totally excludes the procedure. Most will approve if considered medical necessary.