cancer screening

Nearly half the states in the U.S. require that women be notified if mammograms detect that they have dense breasts. Critics say the information raises anxiety more than it improves care.

To qualify for coverage, patients would have to first meet with a doctor to talk through the pros and cons of scans, which involve a low-dose of radiation.

Rates of colorectal cancer have dropped nationally, thanks to better screening. But people who don't have access to health care are more likely to miss out on screening, and face increased risk.