As Members of Congress debate repealing and replacing Obamacare, they should learn from the failures of that law in crafting a better set of health care policies. One important step in that crafting is the establishment of a fairer and more reasonable set of rules for limiting health plans’ application of pre-existing condition exclusions. Policymakers should link the ban on exclusions for pre-existing conditions to a requirement of continuous coverage. Setting the right rules around the prohibition on plans applying pre-existing condition exclusions will not only stabilize insurance markets, but also provide a firmer foundation for future reforms of other aspects of health care policy.