The Gulf Coast is the most fractured health insurance market in the country. Four of the five Gulf states — Florida, Alabama, Mississippi, and Texas — are among the ten states that still have not expanded Medicaid, while Louisiana expanded in 2016. That single policy split means a household earning $20,000 a year can qualify for free Medicaid coverage in Slidell, Louisiana, yet fall into the coverage gap — too much income for Medicaid, by old rules, but below the marketplace subsidy floor — just across the state line in Picayune, Mississippi. Roughly 1.4 million uninsured Americans sit in that gap across the ten non-expansion states, and a large share of them live along this coast.
The uninsured numbers tell the same story. Per 2024 Census Bureau figures, Texas has the nation’s highest uninsured rate at 16.7%, Florida sits at 10.9%, and Mississippi at 9.7% — all above the 8.2% national average — while Louisiana, the lone expansion state in the region, comes in below it at 7.7%. At the same time, the Gulf states have become the engine of ACA marketplace growth: national enrollment hit a record 24.3 million in 2025, Florida led every state with about 4.7 million marketplace enrollees, and enrollment has more than tripled since 2020 in Texas (up 255%), Mississippi (up 242%), and Louisiana (up 234%).
Layer on a workforce that constantly crosses state lines — Pensacola residents commuting to Mobile, Bay St. Louis shipyard workers living near the Louisiana line, oil and gas crews rotating between Houma, Port Arthur, and offshore platforms — plus seasonal tourism, casino, and construction economies where employer coverage is the exception, and choosing a plan here gets genuinely complicated. Which state’s marketplace you use, whether Medicaid is even an option, and how a move or job change affects your coverage all depend on where you live and what you do.
This guide hub collects every in-depth Gulf Coast article we publish: state-by-state ACA marketplace guides, Medicaid and coverage-gap resources, life-event enrollment help, industry-specific coverage breakdowns, and city guides. For broader regional comparisons, our sister site Gulf Coast Coverage covers the Florida Gulf side in more depth.
Health coverage on the Gulf Coast
Tell us where you are and a licensed advisor will compare ACA marketplace plans, subsidies, and coverage-gap options for your state — free, no obligation.