Preventive screenings like mammograms may be free, but follow-up tests can bring big bills

When Cynthia Johnson learned she would owe $200 out-of-pocket for a diagnostic mammogram in Houston, she almost put off getting the test that told her she had breast cancer.

"I thought, 'I really don't have this to spend, and it's probably nothing,'" said Johnson, who works in educational assessment at a university. But she decided to go forward with the test because she could put the copay on a credit card.

Johnson was 39 in 2018 when that mammogram confirmed that the lump she'd noticed in her left breast was cancer. Today, after a lumpectomy, chemotherapy, and radiation, she is disease-free.