For the past decade, the Affordable Care Act (ACA) has successfully reduced uninsurance and improved access to and affordability of health care services for millions of Americans. But the law was weakened when the Trump administration shortened the open enrollment period in the federal Marketplace, reduced outreach and enrollment funding, and revised the public charge rule, among other actions. The Biden administration will have the chance to reverse some of these changes and further strengthen the law to improve health care access and affordability. In this article, the author explores options for expanding access to affordable coverage and care for those who do not qualify for Medicaid or marketplace financial assistance and further discusses opportunities for increasing enrollment among those who are already eligible. The author also examines opportunities for expanding access to specific services, including reproductive health care, among those with insurance. Any attempts to modify or build on the ACA will likely be complicated by the ongoing coronavirus pandemic as well as slim Democratic majorities in the House and Senate, but regulatory solutions will likely be easier to achieve than those that require changes to federal law or state policy.