Jeannette Simonton, a 57-year-old nurse, is suing the Washington State agency that provides health insurance for public employees after her insurance refused to cover the obesity drug Wegovy. Simonton, who has a body mass index of 42, well above the approved cutoff for the drug, argues that the refusal to cover the medication is discriminatory and in violation of state law that recognizes obesity as a type of disability. The lawsuit will test whether health plans can deny coverage for obesity drugs. The demand for obesity medications is high, but the cost of covering them would be significant.