The Impact of Including Pregnancy as a Qualifying Life Event for Marketplace Special Enrollment on Child and Maternal Health - Modified Project Summary/Abstract Section Timely, high-quality prenatal care is associated with improved child and maternal health outcomes, and comprehensive health insurance coverage during pregnancy facilitates access to prenatal care. The Affordable Care Act (ACA) included prenatal and maternity care as one of the ten essential health benefits that must be covered in Marketplace plans (i.e., commercial insurance plans for individuals). ACA Marketplaces are an important source of health insurance for pregnant women who are not eligible for Medicaid or employer-sponsored insurance. However, current Marketplace enrollment policies make it challenging to enroll in a Marketplace plan early in pregnancy, which may have adverse consequences for access to prenatal care and child and maternal health outcomes. All Marketplace plans have an annual open enrollment period (OEP) from approximately November to January. An individual can enroll in a Marketplace plan outside of the annual OEP only through a special enrollment period (SEP), which is a limited time window after a qualifying life event (e.g., loss of insurance coverage, or household change [including childbirth]). The ACA did not include pregnancy as a qualifying event for SEP Marketplace coverage. Therefore, women who become pregnant outside of the OEP must delay Marketplace enrollment until they have an eligible SEP-qualifying event, the next annual OEP, or give birth. In recent years, ten U.S. states have enacted policy to include pregnancy as a Marketplace SEP-qualifying event, meaning that women in these states can enroll in a Marketplace plan when they become pregnant. We hypothesize that this policy facilitates Marketplace enrollment earlier in pregnancy, increases the percent of pregnant women on the Marketplace who receive timely, high-quality prenatal care, and improves maternal and infant health outcomes for Marketplace enrollees. Our study will exploit a natural experiment created by state-level variation in Marketplace SEP eligibility rules to estimate the impact of a policy to include pregnancy as a SEP-qualifying event. Specifically, we will first (Aim 1) describe the role of the Marketplace in providing health insurance coverage and access to prenatal care for pregnant women. We will then use a robust quasi-experimental design to evaluate the impact of including pregnancy as an SEP-qualifying event on (Aim 2) timely prenatal care and (Aim 3) infant and maternal health outcomes for pregnant women who enroll in Marketplace. We will use all-payer claims data from Colorado (intervention state) and Massachusetts (control state) from 2017-2025, which provide many advantages over data used in prior research of pregnant women on the Marketplace. The findings from our study will provide critical and timely information for state-level and federal-level policy-makers to ensure that Marketplace coverage is (i) accessible for pregnant women without other insurance coverage options, and (ii) effective in improving prenatal care and, ultimately, child and maternal health outcomes. Narrative: This proposed research will explore the role of the Affordable Care Act Marketplaces in providing health insurance for pregnant women, facilitating access to timely, high-quality prenatal care, and improving maternal and infant health outcomes. We will take advantage of a natural experiment created by state variation in Marketplace eligibility rules to examine the impact of a policy to include pregnancy as a Marketplace special enrollment period qualifying event; this policy has been enacted in ten U.S. states and is being considered in multiple other states and at the federal level. The results of this project will provide critical and timely information for policy-makers to ensure that Marketplace coverage is (i) accessible for pregnant women without other insurance coverage options, and (ii) effective in improving access to prenatal care and, ultimately, child and maternal health o
