Medicare in New Jersey
May 20, 2026
New Jersey Medicare quick facts (2026)
- Beneficiaries: Roughly 1.7 million New Jersey residents are enrolled in Medicare.
- Active Advantage carriers: Horizon Blue Cross Blue Shield of New Jersey, AmeriHealth, UnitedHealthcare, Aetna, Humana, Cigna, Clover Health, and others.
- State Medicaid program: NJ FamilyCare — relevant for dual-eligible coordination through D-SNPs.
- SHIP resource: NJ State Health Insurance Assistance Program (SHIP) provides free counseling.
Common New Jersey Medicare questions
Q: When can I enroll in Medicare in New Jersey?
A: Federal calendar — Initial Enrollment Period around your 65th birthday; Annual Enrollment Period October 15 – December 7, 2026.
Q: Can I switch Medigap plans in New Jersey without underwriting?
A: Generally only during your federal 6-month Medigap Open Enrollment Period or a guaranteed-issue trigger. NJ does not have a state birthday or anniversary rule, though it does have protections for under-65 disabled Medicare beneficiaries.
Q: I work in NYC but live in NJ — does my plan cover both?
A: Original Medicare + Medigap is portable nationwide. Advantage HMOs typically restrict you to in-network NJ providers; PPO Advantage plans may cover out-of-state in-network providers at higher cost-sharing.
Q: What's NJ FamilyCare?
A: NJ FamilyCare is New Jersey's Medicaid program. Dual-eligibles may qualify for D-SNPs.
Run the numbers for your situation: enrollment calculator · IRMAA calculator · Part D cost calculator.
Medicare in New Jersey — plans and how to compare.
What New Jersey residents should know about Medicare Advantage, Medicare Supplement, and Part D — and how plan availability differs in New Jersey.
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Medicare basics in New Jersey
Medicare is a federal program, so the core rules are the same in New Jersey as everywhere else — but the specific plans available, premiums, and carrier networks vary by ZIP code and county.
Most New Jersey residents become eligible at 65 through Social Security. See eligibility for full rules.
For the 7-month enrollment window timeline, see Turning 65.
What New Jersey residents typically compare
- Medicare Advantage — Many New Jersey counties have 20-50+ Advantage plans. Plans, premiums, and extras vary by county.
- Medicare Supplement (Medigap) — Plans are federally standardized but premium pricing and underwriting rules vary by state.
- Part D prescription drug plans — Available statewide but formularies and preferred pharmacies differ by plan.
See Advantage vs. Supplement for the side-by-side framework.
New Jersey timing rules
The federal Medigap Open Enrollment window is the same everywhere — 6 months starting the month you turn 65 AND have Part B. During that window, no medical underwriting.
Outside that window, most states (including New Jersey unless otherwise noted) allow Medigap carriers to use medical underwriting. Check New Jersey's State Health Insurance Assistance Program (SHIP) for current state-specific rules.
How to compare plans in New Jersey
- Confirm your ZIP — plans differ within New Jersey by county
- List your prescriptions and check each on the plan's formulary
- Confirm your doctors are in-network
- Compare premium + deductible + maximum out-of-pocket
- Check star ratings for plans you are weighing
- Ask about prior authorization requirements (common on Advantage)