Share this article Share this article PHOENIX, Feb. 3, 2021 /PRNewswire/ -- Banner|Aetna is pleased to announce an agreement on a long-term extension of our joint venture relationship. Banner Health and Aetna created this joint venture four years ago to improve member experience, reduce costs, and improve health care outcomes. Through continued collaboration, it has grown to approximately 350,000 members and has delivered on our commitments of: Savings: Since the inception of Banner|Aetna, the Performance network has continued to drive an average cost savings of 8-14%*. The Performance network has proven to be a very attractive option and when given a choice of broad or performance network, more than half of local members choose a Performance network based plan.