In these cases, supplemental insurance policies, such as those designed to cover cancer specifically, can be useful. In the U.S., changes to health care laws have made it possible for those with pre-existing medical conditions to obtain insurance coverage.The Affordable Care Act, the law which has presented these changes, has required health insurance companies in the country to offer coverage to those suffering from conditions such as cancer. Though the law stipulates that these people must be granted access to health insurance, insurance policies are subject to the whims of the companies that underwrite them.