Understanding Your Options: Medicare, Medigap, Medicare Advantage, and Beyond
Choosing health insurance after age 65 often starts with Medicare, but Medicare itself is not a single product. Original Medicare (Parts A and B) covers roughly 80% of approved medical costs, leaving the rest to the beneficiary. To close those gaps, most seniors add either a Medicare Supplement plan (Medigap) paired with a Part D drug plan, or a Medicare Advantage plan (Part C) that bundles medical and often drug coverage into a single policy. Each path has real cost differences, and the right choice depends on your health, budget, travel habits, and tolerance for network restrictions.
What Original Medicare Actually Costs in 2024
Most people pay no premium for Part A because they paid Medicare taxes for at least 10 years. If you do not qualify for premium-free Part A, the 2024 premium is up to $505 per month. Part B has a standard monthly premium of $174.40, though higher-income earners pay more (up to $594.00) through Income-Related Monthly Adjustment Amounts (IRMAA), and lower-income beneficiaries may pay less through state assistance programs.
Beyond premiums, Original Medicare has substantial out-of-pocket exposure:
- Part A deductible: $1,632 per benefit period for inpatient hospital stays.
- Part B annual deductible: $240, then 20% coinsurance for most services with no annual cap.
- No out-of-pocket maximum, which is the single biggest financial risk of staying on Original Medicare alone.
Part D prescription drug plans add another premium, averaging around $55 per month in 2024, plus deductibles, copays, and the famous "donut hole" coverage gap.
Medicare Advantage: Lower Premiums, More Restrictions
Medicare Advantage plans are offered by private insurers and must cover everything Original Medicare covers, often adding dental, vision, hearing, and gym benefits. The trade-off comes in how care is delivered and what you pay along the way.
Typical 2024 Medicare Advantage costs include:
- Monthly premium: $0 to $100, with many plans advertised as $0 premium (though you still pay the Part B premium).
- Out-of-pocket maximum: $4,000 to $8,850 for in-network services, providing a hard cap that Original Medicare lacks.
- Copays and coinsurance: $0 to $50 for primary care visits, $30 to $75 for specialists, $250 to $450 per day for the first few days of a hospital stay.
The catch is network structure. HMOs require you to use in-network providers and get referrals for specialists, while PPOs offer some out-of-network coverage at higher cost. Prior authorization is common, and provider networks can change each year. If you travel frequently or split time between two states, this matters.
Medigap: Higher Premiums, Predictable Costs
Medigap policies are standardized across most states, identified by letters like Plan G, Plan N, and the legacy Plan F (closed to new enrollees after 2019). These plans pay most or all of the 20% coinsurance and deductibles that Original Medicare does not cover.
Realistic 2024 monthly premiums for a 65-year-old in most states:
- Plan G: $120 to $250, depending on state, insurer, and tobacco use.
- Plan N: $90 to $200, with small copays for office and emergency visits.
- High-deductible Plan G: $40 to $90, with a $2,800 annual deductible before coverage kicks in.
The major advantage is predictability. With Plan G, your only significant out-of-pocket cost is the Part B deductible ($240 in 2024), regardless of how much care you use. There are no networks, no referrals, and no prior authorization. Coverage travels with you nationwide and is accepted by any provider that accepts Medicare.
The downsides are real: premiums increase with age (in most states), there is no drug coverage built in (you still need Part D), and dental, vision, and hearing extras are not included.
Other Senior Health Insurance Options Worth Comparing
Medicare is not the only path for older adults, especially for those still working, delaying enrollment, or seeking additional coverage.
Employer or retiree health plans can be valuable if available, particularly for those who continue working past 65 with credible employer coverage. These plans often cap out-of-pocket costs and may include family members. Carefully coordinate with Medicare enrollment rules to avoid late penalties.
COBRA continuation coverage allows up to 18 months of employer plan coverage after leaving a job, but it is typically expensive because you pay the full premium (plus 2%). For most people, COBRA is a short bridge, not a long-term solution, and it does not count as credible drug coverage past a certain point.
ACA Marketplace plans are available to people under 65, and some lower-income seniors not yet eligible for Medicare rely on them. Premium tax credits can reduce costs substantially. However, if you are eligible for Medicare and choose Marketplace coverage instead, you may face gaps in coverage and late-enrollment penalties when you do sign up.
Short-term health insurance is generally a poor fit for seniors because it excludes pre-existing conditions, offers limited benefits, and lacks the consumer protections of ACA-compliant plans. Use only as a temporary bridge.
Hospital indemnity and cancer policies are supplemental policies that pay a fixed amount per day or per treatment. They can help with out-of-pocket costs but are not a substitute for comprehensive coverage. Compare premiums against the realistic chance of using the benefit.
How to Choose the Right Path for You
Start with three honest questions. How much healthcare do you expect to use this year? Are your doctors in any Medicare Advantage network, and do you mind staying in-network? Can you budget a predictable monthly premium, or do you prefer lower premiums with more cost-sharing when care happens?
If you see specialists frequently, travel often, or want maximum provider choice, Original Medicare plus a Medigap Plan G and a Part D plan is hard to beat on predictability, even at $400 to $500 total per month in many areas. If you are healthier, want low premiums, and are comfortable with a network, a Medicare Advantage plan can save money and bundle extra benefits. The worst choice is the one made without comparing your actual providers, prescriptions, and travel patterns against each plan's formulary and network directory during the annual open enrollment window from October 15 to December 7.