After she was diagnosed with advanced breast cancer, Julie Simons and her doctor sought approval from her insurance company to pay for a form of precise, high-dose radiation treatment.The confusing responses they received presaged a struggle to come. UnitedHealth Group Inc.’s insurance division told the doctor that type of radiation wouldn’t be covered during a phone call in February 2024, according to the company. The same day, it sent Simons two conflicting letters: One denying the request as ...