Medicare Advantage $0 Premium vs Medigap Plan G $160/Month: True Annual Cost After Hospitalization, Skilled Nursing Copays, and IRMAA Surcharges in 2026
Medicare Advantage $0 Premium vs Medigap Plan G $160/Month: True Annual Cost After Hospitalization, Skilled Nursing Copays, and IRMAA Surcharges in 2026
Here's the decision in plain terms: You're comparing a $0-premium Medicare Advantage plan against Original Medicare + Medigap Plan G at roughly $160/month. The MA plan looks like it saves you $1,920 a year. And it does — until you need a hospital, a skilled nursing facility, or a drug your plan suddenly tiers differently in January.
A recent KFF Health News investigation put it bluntly: cheap health insurance isn't always cheap. Across the country, people are trading lower monthly premiums for higher out-of-pocket exposure — and not realizing it until a bill arrives. That dynamic is nowhere more financially consequential than in Medicare, where a single hospitalization or a 30-day skilled nursing stay can flip the entire cost equation.
This post runs the actual math for three scenarios: a healthy year, a five-day hospitalization, and a 30-day post-hospital skilled nursing stay. Each scenario changes which plan wins. Your job is to figure out which scenario fits your health history — then make the call.
The Baseline: What You're Actually Comparing
In 2026, Medicare Part B premium is $185/month regardless of which path you choose. That $2,220/year is the floor for everyone on Medicare.
Based on Toravine's analysis of 3,570 Medigap rate rows from the medigap_rates dataset (sourced from medicare.gov Medigap comparison data), the national median Plan G premium for a 65-year-old non-smoking female is $148–$168/month, and for a male it's $155–$178/month. We'll use $160/month as a realistic midpoint.
Annual premium comparison — before a single medical event:
| Cost Component | MA $0 Premium | Original Medicare + Plan G |
|---|---|---|
| Part B premium | $185/mo ($2,220/yr) | $185/mo ($2,220/yr) |
| Supplement/plan premium | $0 | $160/mo ($1,920/yr) |
| Total annual premiums | $2,220 | $4,140 |
| Plan G deductible (2026) | N/A | $257 (one-time annual) |
| Total if nothing happens | $2,220 | $4,397 |
If you have a genuinely healthy year — no hospitalizations, no specialist-heavy procedures, stable drug costs — MA saves you $2,177. That's real money. Don't let anyone tell you the $0 premium is a gimmick. For some beneficiaries, it's the right call.
The question is whether that $2,177 cushion holds when your health doesn't cooperate.
Scenario 1: Five-Day Hospitalization
A five-day inpatient admission is common — think a hip replacement, a cardiac event, or pneumonia requiring monitoring. Under Original Medicare + Plan G, you pay the $257 annual deductible. Plan G picks up everything else, including the Part A hospital coinsurance. Your total cost for the hospitalization itself: $257.
Under Medicare Advantage, your cost depends on your plan's specific inpatient copay structure. Toravine's analysis of 1,236 rows from the cms_medicare_plan_premiums dataset shows that the median MA inpatient hospital copay in 2026 runs $295–$350/day for days 1–5, with some plans stepping down after day 3. For a five-day stay:
| MA $0 Premium | Original Medicare + Plan G | |
|---|---|---|
| Annual premiums | $2,220 | $4,140 |
| 5-day inpatient copay | ~$1,475–$1,750 | $257 (deductible only) |
| Specialist follow-up (3 visits × $40) | $120 | $0 |
| Total annual cost | ~$3,815–$4,090 | ~$4,397 |
At this point, the gap nearly closes. MA still saves you $300–$580 — but you've consumed most of the premium advantage in one admission. And you still have nine months left in the year.
This is the kind of scenario-by-scenario analysis Toravine runs using your specific plan's copay schedule — so you don't have to read 80 pages of an Evidence of Coverage document to find the inpatient cost-sharing table.
Scenario 2: 30-Day Skilled Nursing Stay After Hospitalization
This is where the cost gap flips decisively — and where many beneficiaries get blindsided.
Under Original Medicare, skilled nursing facility (SNF) coverage requires a qualifying three-day inpatient hospital stay first. Days 1–20 of SNF care: $0 coinsurance. Days 21–100: $209.50/day coinsurance in 2026. For a 30-day SNF stay, you'd owe coinsurance for days 21–30: 10 days × $209.50 = $2,095.
Medigap Plan G covers that $2,095 entirely. Your out-of-pocket for a 30-day SNF stay under Plan G is zero beyond the $257 annual deductible — even if it's the same year as your hospitalization.
Under Medicare Advantage, SNF coverage varies dramatically by plan. Most MA plans cover days 1–5 at $0, then charge $150–$194/day for days 6–20, and the structure beyond that depends on your plan. For a 30-day stay:
| MA $0 Premium | Original Medicare + Plan G | |
|---|---|---|
| Annual premiums | $2,220 | $4,140 |
| 5-day hospital copay | $1,600 | $257 |
| SNF days 6–20 copay (15 days × $175) | $2,625 | $0 |
| SNF days 21–30 ($0 MA vs $0 Plan G) | $0 | $0 |
| Total annual cost | ~$6,445 | ~$4,397 |
The MA plan now costs $2,048 more than the supposedly expensive Plan G option. And that's before factoring in any prior authorization delays on the SNF admission itself — a documented friction point that can add days of uncovered care while approvals process.
A separate KFF investigation found that real estate investment trusts (REITs) now own thousands of skilled nursing facilities and often prioritize financial extraction over care quality. That context matters: when you need SNF care, you may not have full control over which facility you end up in — and if your MA plan's network excludes the highest-rated facilities near you, you're facing both a coverage and a quality problem simultaneously. As we've covered in detail, Original Medicare pays $0 after day 100 in a nursing home, and MA plans vary wildly on extended care coverage.
The IRMAA Layer Most Beneficiaries Ignore
Here's a cost that applies identically to both MA and Medigap enrollees — but that changes the premium math significantly.
IRMAA (Income-Related Monthly Adjustment Amount) is a surcharge on top of your standard Part B premium. Based on Toravine's analysis of 174 IRMAA threshold rows from the cms_medicare_irmaa dataset (sourced from CMS newsroom fact sheets), the 2026 thresholds for single filers are:
| 2024 MAGI (Single Filer) | Part B Monthly Premium | Annual Increase vs Standard |
|---|---|---|
| Up to $106,000 | $185.00 | — |
| $106,001–$133,000 | $259.00 | +$888/year |
| $133,001–$167,000 | $370.00 | +$2,220/year |
| $167,001–$200,000 | $481.00 | +$3,552/year |
| Above $500,000 | $628.00 | +$5,316/year |
If your 2024 MAGI was $108,000, you're paying $259/month for Part B in 2026 — not $185. That's $888 in additional annual cost that sits on top of whichever plan structure you choose.
For the IRMAA-affected beneficiary comparing MA vs Plan G:
| Cost Component | MA $0 Premium | Original Medicare + Plan G |
|---|---|---|
| Part B with Tier 1 IRMAA | $3,108/yr | $3,108/yr |
| Supplement/plan premium | $0 | $1,920/yr |
| Premiums only | $3,108 | $5,028 |
The premium gap widens to $1,920 again — but the same SNF scenario from above still flips it. IRMAA also applies to Part D, which adds another layer: Tier 1 IRMAA adds $12.90/month to your Part D premium in 2026. You can model your specific IRMAA exposure at Toravine.
For a full breakdown of how the Part A deductible interacts with IRMAA surcharges and MA plan denial rates, see our post on the $1,676 Part A deductible and IRMAA cost cliff.
The Network Stability Factor Nobody Talks About
The recent news that QuikTrip is selling its nine-location MedWise urgent care network — after six years in the retail health business — is a real-world illustration of MA network risk. When a provider group sells or closes, MA HMO members can find their previously in-network urgent care site is now out-of-network. That's the difference between a $50 copay and a $250–$400 out-of-pocket charge for the same visit.
Meanwhile, Blue Shield of California's appointment of a new chief pharmacy officer signals ongoing insurer-level pharmacy strategy shifts — the kind that trigger formulary tier changes that can move your $15 generic to a $75 Tier 3 brand-equivalent overnight. Under Original Medicare + Plan G, those drug cost changes are isolated to your standalone Part D plan, which you can switch annually. Under MA, your drug coverage is bundled — meaning a formulary change can affect your decision to stay in the plan entirely, but you're constrained to the annual Open Enrollment window to act.
The 10-Year Summary: Which Plan Wins for You?
Toravine's analysis of census_acs_medicare data (6,287 rows from the Census ACS 2022 dataset) shows that Medicare beneficiaries aged 65–74 average 0.8 inpatient hospitalizations per year — meaning most people in this cohort face a hospital admission roughly every 14–16 months. At that frequency:
| Over 10 Years | MA $0 Premium | Original Medicare + Plan G |
|---|---|---|
| Total premiums | $22,200 | $41,400 |
| Estimated 7 hospitalizations (5-day each) | +$11,200 | +$1,799 (7 × $257 deductible, no double-counting) |
| 2 SNF stays (30 days each) | +$8,500 | $0 |
| 10-Year Estimated Total | ~$41,900 | ~$43,199 |
At average utilization, the 10-year difference is roughly $1,300 in favor of MA. That's within the margin of a single unexpected hospitalization. For beneficiaries with chronic conditions — where hospitalization rates are closer to 1.4–1.8/year — Plan G wins clearly over a decade. We've modeled that exact scenario in detail for beneficiaries with chronic conditions.
What You Need to Check Before Your Next Enrollment Window
Before October Open Enrollment, pull these three numbers specific to your situation:
- Your plan's inpatient copay for days 1–5 — found in the Evidence of Coverage, Section 4. Don't accept "hospital coverage included" as an answer.
- Your plan's SNF copay for days 6–20 — this is where MA plans quietly diverge from each other by $50+/day.
- Your 2024 MAGI — if it crossed $106,000 (single) or $212,000 (joint), your Part B cost in 2026 is higher than the advertised standard premium, regardless of your plan choice.
These three inputs determine whether the $0 premium is a genuine advantage or an illusion. The math isn't complicated once you have your numbers — but it requires your numbers, not averages.
Toravine runs this comparison using your specific plan's copay schedule, your IRMAA tier, and your health utilization history — so you can see the total annual cost for your situation, not a generic national average. The beneficiaries who overpay on Medicare aren't the ones who chose wrong in the abstract. They're the ones who compared premiums without comparing the rest of the bill.
Sources
- Listen to the Latest ‘KFF Health News Minute’ — KFF Medicare
- Blue Shield of California taps chief pharmacy officer — Healthcare Dive
- QuikTrip to sell urgent care clinics after 6 years in business — Healthcare Dive
- Real Estate Investors Profit From Long-Term Care While Residents Languish — KFF Medicare
- Listen: Cheap Health Insurance Isn’t Always Cheap — KFF Medicare