Harrison County at a Glance
Harrison County is the most populous county on the Mississippi Gulf Coast, home to approximately 210,000 residents across Gulfport (the county seat), Biloxi, Long Beach, Pass Christian, and D'Iberville. The county's economy is anchored by the gaming and hospitality industry — nine casinos line the beachfront — as well as the Port of Gulfport, one of the top 20 U.S. ports by volume, Keesler Air Force Base in Biloxi, and a substantial healthcare sector. Hurricane Katrina's devastating impact in 2005 reshuffled the county's built environment, and the post-2005 redevelopment brought new commercial development, improved infrastructure, and population recovery. Understanding the county's diverse workforce — casino employees, military families, port workers, healthcare professionals, and service industry workers — is essential to navigating its insurance landscape.
Hospital Infrastructure
Memorial Hospital at Gulfport is the major regional medical center for Harrison County, offering a full range of surgical, cardiac, oncology, and emergency services. Merit Health Biloxi (formerly Gulf Coast Medical Center) serves the eastern end of the county and the Biloxi area. Garden Park Medical Center provides additional acute care capacity. For complex specialty cases, residents may be referred to Singing River Health System in neighboring Jackson County, or occasionally to larger systems in New Orleans. Keesler Medical Center on Keesler AFB provides comprehensive healthcare for active-duty members and their families, but is generally not accessible to civilian residents. When comparing ACA marketplace plans, confirming hospital network inclusion is critical — BCBS Mississippi has the broadest civilian network coverage in the county.
The Mississippi Medicaid Gap: A Serious Problem for Harrison County Workers
Unlike most other states, Mississippi has not expanded Medicaid under the Affordable Care Act. The current Mississippi Medicaid program largely excludes non-disabled adults without dependent children, and even for parents, income thresholds are extremely low. This creates a "coverage gap" for adults who earn too much to qualify for Mississippi Medicaid but earn less than 100% of the Federal Poverty Level — approximately $15,060 per year for a single adult in 2026. ACA marketplace subsidies begin at 100% FPL, meaning people in this gap cannot access subsidized private coverage and do not qualify for Medicaid.
In Harrison County, this gap disproportionately affects part-time casino workers, food-service employees, seasonal tourism staff, and informal economy workers. An estimated 90,000 to 100,000 Mississippians statewide fall into this gap. Residents who find themselves in this situation should explore federally qualified health centers (FQHCs), which offer income-sliding-scale care, as well as charitable care programs at Memorial Hospital. A licensed advisor can help assess your exact income position and whether any qualifying coverage pathways exist.
Casino and Gaming Workforce Coverage
Harrison County's nine casinos — including Beau Rivage (MGM Resorts), IP Casino Resort Spa (Boyd Gaming), Hard Rock Hotel and Casino Biloxi, and Golden Nugget — are among the county's largest employers. Full-time casino employees in dealer, table games, and management roles typically receive employer-sponsored group health plans, which are generally solid coverage. The complication arises with part-time workers, banquet and catering staff, independent contractors, and employees of subcontractors who service the casinos. These workers often lack access to the employer plan or do not meet the eligibility hours threshold.
Workers between jobs — including those laid off after slow seasons — can use a qualifying life event Special Enrollment Period to enroll in ACA coverage within 60 days of losing employer coverage. Workers who qualify for marketplace subsidies (income above 100% FPL) should compare BCBS MS and Ambetter plans, with particular attention to Silver-tier CSR plans that can dramatically reduce out-of-pocket costs.
Keesler Air Force Base and TRICARE
Keesler AFB in Biloxi is a major employer and economic anchor for Harrison County. The base houses the 81st Training Wing and hosts Keesler Medical Center, a full-service military hospital. Active-duty service members and their enrolled dependents receive TRICARE Prime coverage through Keesler Medical Center, with access to civilian network providers for specialty care not available on base.
When service members separate from the military, TRICARE coverage ends — typically after a 180-day Transitional Assistance Management Program (TAMP) window for those who served at least 30 consecutive days before separation. Separating personnel should begin comparing ACA marketplace options 90 days before TAMP ends, as loss of TRICARE triggers a 60-day Special Enrollment Period. BCBS Mississippi and Ambetter both offer marketplace plans in Harrison County.
Lowest Premium
High deductible ($6,000–$8,000) but low monthly cost. Best for healthy workers with emergency-only needs.
Best Value — Key for MS Workers
With CSR enhancement at 100–200% FPL, deductibles can drop to $300–$800. Critical in Mississippi where Medicaid gap is prevalent.
Predictable Costs
Higher monthly premium but lower cost-sharing. Good for families with regular healthcare use who aren't subsidy-eligible.
Maximum Coverage
Covers ~90% of costs. Worth considering for chronic condition management or high-utilization households.
Shipbuilding and Industrial Workforce
While Huntington Ingalls Industries' primary shipbuilding operations are in Pascagoula (Jackson County), a significant portion of that workforce resides in Harrison County and commutes eastward. Defense contractor employees typically receive employer-sponsored health coverage. However, the network of suppliers, service contractors, and subcontractors supporting the shipbuilding industry includes many workers who do not receive the same benefit packages as direct Ingalls employees. These workers are well-served by reviewing ACA marketplace options, particularly if they have variable hours or seasonal contract terms.
Harrison County residents navigating the Medicaid gap, casino job changes, or Keesler separation deserve clear guidance on what coverage actually costs. A Gulf Coast Plans advisor can help.
CallFrequently Asked Questions
What is the Medicaid coverage gap in Mississippi and who falls in it?
The Mississippi Medicaid gap affects adults who earn too much to qualify for current Mississippi Medicaid but earn less than 100% of the Federal Poverty Level — approximately $15,060 for a single adult in 2026. ACA marketplace subsidies start at 100% FPL, so this group is caught between two programs with no affordable coverage option. Mississippi has not expanded Medicaid, leaving an estimated 90,000–100,000 Mississippians statewide in this gap.
What health insurance options do Biloxi casino workers have?
Full-time casino employees typically receive employer-sponsored group health insurance. Part-time and contract workers who qualify — earning above 100% FPL — can enroll in ACA marketplace plans from BCBS Mississippi or Ambetter. Workers earning between 100% and 250% FPL should specifically look at Silver-tier CSR plans, which offer dramatically reduced deductibles and out-of-pocket costs.
How does TRICARE work for Keesler AFB families and what happens when they separate?
Active-duty service members and their families at Keesler AFB are covered by TRICARE through Keesler Medical Center. When a service member separates, TRICARE ends after the TAMP window (typically 180 days). Separating personnel have a 60-day Special Enrollment Period after TRICARE ends to enroll in ACA marketplace coverage — BCBS Mississippi and Ambetter both offer plans in Harrison County.
Which carriers offer ACA plans in Harrison County Mississippi?
Harrison County residents have access to BCBS Mississippi and Ambetter from Magnolia Health on the ACA marketplace. BCBS Mississippi has the broadest network, covering Memorial Hospital at Gulfport and Merit Health Biloxi. Compared to Florida and Alabama, Mississippi marketplace options are more limited, making it especially important to verify that your preferred doctors and hospitals are in-network before selecting a plan.
For Gulf Coast coverage options across the region, visit Gulf Coast Coverage. Florida residents can use Florida Plan Finder to compare plans by county. Southern state residents can also explore plans at Southern Plan Finder.