For almost a century, the Supreme Court has not invalidated a law using the nondelegation doctrine. Recognizing that Congress seldom has expertise to address the ever-increasing complexities of society, the Court has long held that Congress can legislate broadly and seek help from federal agencies to fill up the details. Accordingly, courts defer to Congress’s delegation choices, as long as it lays down an intelligible principle to guide the agencies entrusted with implementing legislation. Under that approach, the Court has upheld broad delegations of authority to federal agencies. This approach has been the bedrock of meaningful agency action, especially in health policy in which agencies must leverage their expertise to respond to highly technical issues, emergencies, advances in technology, and the need to address health disparities. While this deferential approach has guided the courts and Congress for decades, delegation is increasingly under attack. Braidwood Management, Inc. v. Becerra, which challenges the Affordable Care Act’s preventive services requirement, exemplifies nondelegation-based attacks on agency authority. With several members of the Supreme Court signaling interest in revisiting the current deferential delegation standard, Braidwood likely provides an opportunity for the Supreme Court to do so. Reinvigorating the nondelegation doctrine — coupled with the major questions doctrine and rolling back of Chevron deference — will hurt U.S. health policy. It will not only constrain how agencies work, but also aggrandize the courts and limit how Congress may achieve legislative goals.