Lifestyle interventions alone have limited long-term efficacy, so many members will need effective medical or surgical therapy to attain optimal healthy weight.

The deal, which is similar to those with three other insurers, limits use of retroactive insurability checks to 90 days.

Retirees claim that AT&T selected a "risky" insurer, Athene Annuity and Life, to conduct the $8.05 billion pension risk transfer of plan assets, but the company claims it is not responsible for a decision made by its independent fiduciary.

Twenty-six of the 28 physicians included in the study received payments from pharmaceutical companies for a variety of reasons, most often noted as food and beverages, speaking or consulting fees.