Researchers assessed self-reported uninsurance at 2 to 6 months postpartum among people with Medicaid-paid births using the New York City Pregnancy Risk Assessment Monitoring System (PRAMS), comparing immigrant and US-born people. They created a pre-FFCRA cohort of 2611 births from 2016 to 2019 and a post-FFCRA implementation cohort of 1197 births from 2020 to 2021. Researchers found de facto postpartum Medicaid extension decreased immigrant inequities in insurance coverage, but Hispanic immigrants may have been unaware of continued coverage. Postpartum Medicaid extension policies that are inclusive of all immigrants may decrease inequities, but community-integrated implementation is needed to raise awareness of coverage and advance postpartum maternal health equity.