KFF Health News Jul 18 2025 Last year in Massachusetts, after finding lumps in her breast, Jessica Chen went to Lowell General Hospital-Saints Campus, part of Tufts Medicine, for a mammogram and sonogram. Before the screenings, she asked the hospital for the estimated patient responsibility for the bill using her insurance, Tufts Health Plan. Her portion, she was told, would be $359 — and she paid it. She was more than a little surprised weeks later to receive a bill asking her to pay an