Enlarge / Signage is displayed outside the Humana Inc. office building in Louisville, Kentucky, US, in 2016. (credit: Getty | Luke Sharrett)

Humana, one the nation’s largest health insurance providers, is allegedly using an artificial intelligence model with a 90 percent error rate to override doctors’ medical judgment and wrongfully deny care to elderly people on the company’s Medicare Advantage plans.

According to a lawsuit filed Tuesday, Humana’s use of the AI model constitutes a “fraudulent scheme” that leaves elderly beneficiaries with either overwhelming medical debt or without needed care that is covered by their plans. Meanwhile, the insurance behemoth reaps a “financial windfall.”

The lawsuit, filed in the US District Court in western Kentucky, is led by two people who had a Humana Medicare Advantage Plan policy and said they were wrongfully denied needed and covered care, harming their health and finances. The suit seeks class-action status for an unknown number of other beneficiaries nationwide who may be in similar situations. Humana provides Medicare Advantage plans for 5.1 million people in the US.