The biggest health insurers are moving quickly towards value-based care arrangements, their recent earnings reports show.

While Aetna has long-held a goal to reach 75 to 80 percent of its medical spend in value-based relationships by 2020, Aetna’s medical spend is now 45 percent tied to value, CEO Mark Bertolini said during last week’s fourth quarter earnings call.

“One way we measure our success is by how well we are able to keep our members out of the hospital and in their homes and communities,” Bertolini said. “For example, in 2016, we reduced total acute admissions by approximately 4 percent, and we deployed predictive modeling to target members at the greatest risk of readmission.”

Aetna has achieved a 27 percent reduction in readmission rates using multidisciplinary care teams that engage facilities to develop effective discharge plans, he said.

“Collectively, these clinical programs have driven a best-in-class Stars readmission rate among national competitors,” he said.

Aetna sees more opportunities for reducing utilization over the long-term in readmission rates, and in a reduction in inpatient days. Unit price is still the driver in value-based purchasing, Bertolini said.

“I think value-based contracting is going to continue to be encouraged by even the current administration as a way of getting a handle on healthcare costs,” he said. “We have a healthy pipeline of opportunities. They will not all be joint ventures. I think there are other models emerging.”

UnitedHealthcare is increasingly helping states manage care for their complex, vulnerable and most costly populations, as well as assisting employers with programs to support the needs of retirees and employees with chronic conditions, according to CEO Stephen Hemsley in the insurer’s earnings report.

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Jeffrey R. Ungvary President