Medigap vs Medicare Advantage
Updated: June 2026
When you become eligible for Medicare, you face one big fork in the road: stay on Original Medicare and add a Medicare Supplement (Medigap) plan, or move your benefits into a Medicare Advantage (Part C) plan. The two paths work very differently — different doctors, different costs, different paperwork. This guide walks through the trade-offs so you can decide which one fits your life.
Kevin Fuller is an independent, Texas-licensed broker representing both Medicare Advantage and Medigap carriers in the greater Houston area and across Texas. There is no fee to work with him. Call 832-810-5433 to talk it through one-on-one.
The two paths at a glance
| Feature | Medigap | Medicare Advantage |
|---|---|---|
| Provider access | Any doctor in the U.S. who accepts Medicare | Regional HMO or PPO network |
| Monthly premium | Higher (in addition to Part B) | Often $0–$50 (plus Part B) |
| Out-of-pocket at care | Very low after deductibles | Copays/coinsurance up to annual max |
| Drug coverage | Buy a separate Part D plan | Usually built in |
| Dental, vision, hearing | Not included | Commonly included |
| Referrals & prior auth | No referrals; minimal prior auth | Referrals on HMOs; prior auth common |
| Travel coverage | Nationwide; some plans cover foreign emergencies | In-network area only (emergencies covered nationwide) |
Medigap: pros and cons
A Medicare Supplement plan pairs with Original Medicare. Medicare pays first, your Medigap plan pays the gaps second, and you can use any provider in the country that accepts Medicare.
Pros
- Nationwide provider access — no network restrictions
- Predictable bills: low or no cost-sharing at the point of care
- No referrals or prior authorization for most services
- Benefits are standardized by federal law (Plan G is Plan G everywhere)
- Better fit for snowbirds, frequent travelers, and multi-state families
Cons
- Higher monthly premium than most Advantage plans
- No drug, dental, vision, or hearing — purchased separately
- Premiums typically rise over time depending on the rating method
- Switching plans later may require medical underwriting in Texas
Medicare Advantage: pros and cons
A Medicare Advantage plan replaces the way you receive your Medicare benefits. A private insurer administers your Part A and Part B coverage, usually bundled with Part D and extras like dental and vision, through a regional network of providers.
Pros
- Low or $0 monthly premium on many plans
- Drug coverage is usually included — one card, one plan
- Extras: dental, vision, hearing, fitness benefits, OTC allowances
- Annual out-of-pocket maximum caps your medical spend each year
- Plans can be changed each fall during Annual Enrollment
Cons
- Regional network — using out-of-network providers can be expensive or not covered
- Copays and coinsurance for most services until you hit the out-of-pocket max
- Prior authorization is common for hospital stays, imaging, and specialists
- Travel outside the network area is limited to emergency and urgent care
- HMO plans usually require referrals to see specialists
Network vs nationwide: the deciding factor for most people
The single biggest practical difference is provider access. Medigap lets you walk into any doctor or hospital in the U.S. that accepts Medicare — which is almost all of them. Medicare Advantage limits you to the plan's network, which in the Houston area means specific hospital systems and their affiliated specialists.
If your priorities include keeping a specific doctor, splitting time between Texas and another state, or wanting the freedom to seek second opinions outside one hospital system, Medigap is almost always the better long-term fit. If you're comfortable staying inside a network and want the lowest premium plus built-in extras, Medicare Advantage can be the right call — especially when the network includes the doctors and facilities you already use.
Costs: premium vs pay-as-you-go
Think about cost in two layers. Medigap shifts more cost into the monthly premium and very little into the point of care — your bills are small and predictable, even in a heavy medical year. Medicare Advantage does the opposite: low premium, but you pay copays and coinsurance as you use the plan, up to an annual maximum.
In a low-use year, Advantage usually wins on total cost. In a year with a hospital stay, major surgery, or extended treatment, Medigap often comes out ahead because there's almost nothing to pay at the point of care. The right pick depends on which year you want to be protected against.
Switching between the two later
You can move from Medigap to Medicare Advantage any year during the fall Annual Enrollment Period — that direction is easy. Moving from Medicare Advantage back to Medigap is harder: outside guaranteed-issue situations, Texas Medigap carriers can use medical underwriting and may decline or rate-up your application based on health. That's why the initial choice deserves a careful conversation, especially if your health could change in the next few years.
How to decide
- Lean Medigap if you travel, want nationwide access, prefer predictable bills, or expect significant medical use over the coming years.
- Lean Medicare Advantage if your doctors are inside the network, you want a low premium with extras like dental and vision, and you're comfortable with copays and prior authorization.
- Either can work for generally healthy people who stay local — the right answer comes down to budget preference and how much network flexibility you want.
Read more about each path: Texas Medigap guide · Houston Medicare Advantage guide.
Not sure which path fits?
Kevin is appointed with both Medigap and Medicare Advantage carriers — no pressure either way. Call or schedule a no-cost review.
Frequently asked questions
Which is better, Medicare Advantage or Medigap?
Neither is universally better — they solve different problems. Medigap (Medicare Supplement) pairs with Original Medicare to give you nationwide provider access and very predictable out-of-pocket costs, at a higher monthly premium. Medicare Advantage bundles your benefits into one private plan, usually with a low or $0 premium and extras like dental, vision, and drug coverage, but uses a regional network and a yearly out-of-pocket maximum. The right choice depends on how often you travel, which doctors you want to keep, and how much premium-versus-pay-as-you-go risk you're comfortable with.
Can I switch from Medicare Advantage to a Medigap plan later?
You can try, but it isn't automatic. Outside of guaranteed-issue situations (like a trial right in your first year on Medicare Advantage, or a plan leaving your area), Texas Medigap carriers can use medical underwriting and may decline or rate-up your application. That's why the initial choice matters — switching from Advantage to Medigap later usually requires good health.
Does Medicare Advantage cover doctors outside Texas?
Most Medicare Advantage plans use regional networks and only cover non-emergency care inside that network. Emergency and urgent care are covered nationwide, but routine visits, scheduled procedures, and follow-up care outside the network are usually not. If you split time between Texas and another state, or travel often, Medigap's nationwide access is typically a better fit.
Does Medigap include prescription drug coverage?
No. Medigap plans don't include Part D drug coverage, so most people pair Medigap with a stand-alone Part D plan. Medicare Advantage plans usually include drug coverage built in. When comparing total monthly cost between the two paths, include the Part D premium on the Medigap side.
How much more does Medigap cost than Medicare Advantage?
Medicare Advantage premiums in the Houston area are often $0 to $50 a month, while Medigap Plan G premiums for a 65-year-old in Texas commonly run higher. The trade-off is that Medigap has minimal cost-sharing after the Part B deductible, while Advantage plans use copays and coinsurance up to an annual out-of-pocket maximum. Total cost depends on how much care you use during the year.
Do I have to pay Kevin to help me choose between Advantage and Medigap?
No. There is no fee to work with Kevin. Independent Medicare brokers are paid by the insurance carriers when you enroll, so your premium is identical whether you sign up on your own or with help — and Kevin is appointed with both Medicare Advantage and Medigap carriers, so the recommendation isn't tied to one product.