Medicare in St. Johns County: A Complete Guide for St. Augustine Residents

St. Johns County is one of the fastest-growing counties in Florida and one of the most sought-after retirement destinations in the Southeast. The combination of America's oldest city, excellent schools (relevant for grandparents), low crime, beautiful beaches, and proximity to Jacksonville makes St. Johns County a top choice for retirees relocating from the Northeast and Midwest.

With that growth comes a Medicare market that has expanded significantly in recent years — more plan options, more carriers, and more decisions for St. Johns County residents turning 65 or moving to the area.

This guide covers everything St. Augustine and St. Johns County residents need to know about Medicare.

St. Johns County's Medicare market sits between two major healthcare hubs — Jacksonville to the north and Daytona Beach to the south — giving residents access to a wide range of providers and facilities. The county's own healthcare infrastructure has grown substantially as the population has expanded.

Key facts about Medicare in St. Johns County:

• Plan availability has increased significantly as the county's population has grown
• Both HMO and PPO Medicare Advantage plans are available
• Residents have access to Jacksonville's major health systems (Mayo Clinic, Baptist Health, UF Health) within 30–45 minutes
• HCA Florida Flagler Hospital in St. Augustine is the county's primary acute care facility
• Medicare Supplement plans are available from multiple carriers

HCA Florida Flagler Hospital (formerly Flagler Hospital) is the primary acute care hospital in St. Augustine and the anchor of St. Johns County's healthcare network. The hospital offers emergency care, surgical services, cardiac care, orthopedics, women's services, and cancer care.

Flagler Hospital participates in most Medicare Advantage networks serving St. Johns County. Always verify your specific plan's current network status before enrolling.

St. Johns County has seen significant growth in outpatient specialty care, imaging centers, and physician practices over the past decade. Many of these providers are affiliated with either Flagler Hospital or Jacksonville-based health systems.

One of the major advantages of living in St. Johns County is proximity to Jacksonville's major health systems:

• Mayo Clinic Florida (Jacksonville): 30–45 minutes north — world-class specialty and complex care
• Baptist Health System: Multiple facilities accessible from northern St. Johns County
• UF Health Jacksonville: Academic medical center with complex care capabilities

For St. Johns County residents who want access to Mayo Clinic, a Medicare Supplement plan paired with Original Medicare typically provides the broadest access. Verify Mayo Clinic's current Medicare Advantage network participation before enrolling in any Advantage plan.

Medicare Advantage plan availability in St. Johns County has grown substantially as the county's population has increased. Residents now have access to multiple carriers and plan types.

• $0-premium plans: Available from multiple carriers in most St. Johns County ZIP codes
• Plan types: Both HMO and PPO structures are available
• Network considerations: Verify that your St. Augustine doctors and Flagler Hospital are in network before enrolling
• Jacksonville access: If you want access to Jacksonville health systems, verify those providers are in network as well

St. Johns County residents face a unique network consideration: do you primarily use St. Augustine-area providers, or do you regularly travel to Jacksonville for care? The answer significantly affects which Medicare Advantage plan is right for you.

If you use both St. Augustine and Jacksonville providers, a PPO plan may offer more flexibility than an HMO. If you primarily use local St. Augustine providers, an HMO plan may offer better value.

This is exactly the kind of nuanced question that an independent Medicare broker can help you work through.

For St. Johns County residents who want maximum flexibility — particularly those who want access to Mayo Clinic or who travel frequently — a Medicare Supplement plan offers significant advantages.

Many St. Johns County retirees are relocating from high-income states and are accustomed to premium healthcare. The ability to see any Medicare-participating provider nationwide — without network restrictions, referral requirements, or prior authorizations — is a significant quality-of-life advantage.

Medicare Supplement plans are standardized by letter (Plan G, Plan N, etc.) and accepted by any Medicare-participating provider in the country. This is particularly valuable for retirees who travel, spend time in multiple states, or want access to the best specialists regardless of network.

When you first enroll in Medicare, you have guaranteed issue rights to purchase any Medicare Supplement plan regardless of your health history. Florida insurers cannot deny you coverage or charge you higher premiums based on pre-existing conditions during this window.

Once this window closes, Florida insurers can medically underwrite you — meaning they can deny coverage or charge higher premiums based on your health. This is your best opportunity to lock in Medigap coverage.

Related: Medicare Supplement Plan G → | Medicare Supplement Plan N → | Why Medigap in Florida →

St. Johns County does not have a dedicated Social Security Administration office. The nearest SSA offices are in Jacksonville:

• Jacksonville SSA Office: 5455 Beach Blvd, Jacksonville, FL 32207

Most St. Johns County residents find it easier to enroll online at ssa.gov/medicare/sign-up or by calling SSA at 1-800-772-1213.

Your Initial Enrollment Period (IEP) is a 7-month window: 3 months before your 65th birthday month, your birthday month, and 3 months after. Enrolling in the first 3 months ensures your coverage begins on the first day of your birthday month with no gap.

Missing your IEP without creditable employer coverage triggers permanent late enrollment penalties that follow you for life.

Related: How to Enroll in Medicare → | Medicare Enrollment Deadlines →

St. Johns County is one of the top relocation destinations in Florida, with thousands of new residents arriving each year from the Northeast, Midwest, and other parts of Florida. If you are moving to St. Johns County, you may qualify for a Special Enrollment Period (SEP) to change your Medicare plan.

Moving to a new service area is a qualifying life event that gives you 60 days to enroll in a new plan. This is particularly important for Medicare Advantage enrollees — your current plan may not operate in St. Johns County.

Key steps when moving to St. Johns County:

1. Notify Medicare of your new address (through your my Social Security account or by calling 1-800-MEDICARE)
2. Research Medicare Advantage and Medicare Supplement plans available in your new ZIP code
3. Enroll in a new plan within 60 days of your move
4. Update your doctors and pharmacy with your new Medicare information

Related: Moving to Florida Medicare Guide →

St. Johns County has a growing number of retirement communities, active adult communities, and continuing care retirement communities (CCRCs). Residents of these communities often have specific Medicare considerations:

• Active adult communities (55+ communities like Nocatee, Palencia, and others): Residents typically use standard Medicare plans and local providers
• Assisted living facilities: Medicare covers skilled nursing care but not custodial care. Long-term care planning is a separate consideration.
• CCRCs: Some CCRCs have preferred Medicare Advantage plans or relationships with specific carriers. Understand these arrangements before enrolling.

Related: Long-Term Care Planning in Florida →

Nocatee — one of the fastest-growing master-planned communities in the country — straddles the St. Johns/Duval County line. Ponte Vedra Beach is one of the most affluent communities in Northeast Florida.

Residents of these communities often have specific Medicare considerations:

• ZIP codes in these areas may have different plan availability than St. Augustine proper
• Always compare plans using your specific ZIP code, not just the county
• Residents with higher incomes may be subject to IRMAA (Income-Related Monthly Adjustment Amount) surcharges on their Medicare Part B and Part D premiums

Related: What Is IRMAA? →

An independent Medicare broker who knows the St. Johns County market can help you navigate the growing number of plan options, understand the local provider landscape, and make a confident decision.

I am an independent Medicare broker serving St. Johns County, St. Augustine, Ponte Vedra, and all of Northeast Florida. I have been helping residents navigate Medicare since 1998.

Schedule a free Medicare consultation →

• Medicare Agent in St. Augustine →
• Medicare Enrollment Florida →
• How to Enroll in Medicare →
• Medicare Advantage vs. Medicare Supplement →
• Medicare Supplement Plan G →
• Why Medigap in Florida →
• Moving to Florida Medicare Guide →
• Long-Term Care Planning in Florida →
• Medicare in Duval County →
• Medicare in Flagler County →
• Medicare in Volusia County →

William Gray is an independent Medicare broker serving St. Augustine, St. Johns County, and all of Northeast Florida since 1998. FL License W690237. We do not offer every plan available in your area. Currently we represent multiple organizations which offer multiple products in your area. Please contact Medicare.gov, 1-800-MEDICARE, or your local State Health Insurance Program (SHIP) for information on all available options.