Experts know that having no health insurance, or being underinsured, is linked with poorer cancer care and survival. In fact, it’s one of the strongest predictors of a poor outcome of care and treatment for cancer. But few studies have looked at what happens when there is a disruption in health insurance coverage—for example, temporarily losing coverage because you change jobs, or if you gain or lose Medicaid eligibility. A new study found that these types of gaps in health insurance coverage can lead to limited access to treatment and worse survival.