Original Medicare Has No Out-of-Pocket Cap in 2026: How the Senate OOP Bill, Hospital Price Variation, and Enrollment Deadlines Determine Whether Medigap Plan G or Medicare Advantage Costs Less
Original Medicare Has No Out-of-Pocket Cap in 2026: How the Senate OOP Bill, Hospital Price Variation, and Enrollment Deadlines Determine Whether Medigap Plan G or Medicare Advantage Costs Less
Most Medicare comparisons obsess over premiums. That's the wrong number. The number that actually determines your financial risk is the out-of-pocket maximum — or in Original Medicare's case, the complete and total absence of one.
Here's your decision moment if you're approaching Medicare or heading into the October 15 Annual Enrollment Period: Original Medicare has no OOP cap in 2026. That one structural feature drives more enrollment mistakes than any other aspect of Medicare design. And right now, it's generating serious legislative attention in Washington — attention that changes your enrollment math in ways you need to understand before you lock anything in.
The 4 Decisions You Need to Make — and the Exact Deadlines for Each
If you're turning 65 in the next few months, or reassessing your plan before AEP, here are the four decisions and what happens if you miss them:
| Decision | Enrollment Window | Consequence of Missing It |
|---|---|---|
| Part B enrollment | 7-month IEP: 3 months before your birthday month through 3 months after | 10% permanent premium penalty per year late |
| Medicare Advantage vs. Original Medicare | Annual Enrollment: Oct 15 – Dec 7 | Coverage locked until next AEP |
| Medigap Plan G enrollment | 6 months from Part B effective date | Medical underwriting required in most states — you can be denied or charged more |
| Part D drug plan | IEP or AEP | 1% per month penalty, compounded every year you're late, for life |
The Medigap window is the most consequential and least reversible of all four. You have exactly six months from your Part B start date to enroll in any Medigap plan without answering a single medical question. Miss it, and insurers in most states can deny you outright, impose waiting periods, or surcharge your premium based on your health history. That window doesn't reopen — not during AEP, not during MA OEP, not ever, unless you live in one of a handful of states with continuous guaranteed-issue protections.
The Senate OOP Cap Proposal: What It Means — and What It Doesn't Mean Yet
Senate Democrats, including Finance Committee members led by Sen. Ron Wyden, have introduced legislation to add a hard annual out-of-pocket spending cap to Original Medicare. The proposal targets the most fundamental structural gap in Medicare design: Medicare Advantage enrollees have a legally mandated maximum out-of-pocket ceiling, while beneficiaries in straight Original Medicare face unlimited exposure.
Here's the current financial landscape in 2026 across all three paths:
Original Medicare — No Medigap:
- Part A deductible: $1,676 per benefit period (not per calendar year — two hospitalizations mean two deductibles)
- Part B coinsurance: 20% of all covered outpatient costs, with no annual ceiling
- Skilled nursing facility coinsurance: $209.50/day for days 21–100
- Total annual exposure: theoretically unlimited
Medicare Advantage (average plan, 2026):
- Monthly premium: $0–$50 (many plans still carry $0 after Part B)
- In-network MOOP: up to $9,350 in 2026 (CMS-set maximum; many plans set theirs lower)
- Combined in/out-of-network MOOP: up to $14,000
Original Medicare + Medigap Plan G:
- Annual Part B deductible: $257 (the only cost Plan G doesn't cover)
- Everything else: $0 coinsurance, zero exposure beyond that single deductible
- Monthly Medigap premium: $150–$221 for a 65-year-old, based on Toravine's analysis of 3,570 rows of medigap rate data across markets and ages
The Senate proposal is designed to close the exposure gap for Original Medicare-only enrollees — and if it passes with a meaningful cap (estimates have ranged from $2,000 to $3,500 annually), it dramatically changes the value proposition of Medigap. Why pay $178–$221/month for Plan G if Original Medicare itself caps your risk at $2,500?
But here's the problem: the bill hasn't passed, faces significant GOP opposition, and has no implementation timeline. You cannot make your 2026 enrollment decision based on legislation that remains in proposal stage. And if you delay Medigap enrollment while waiting to see what Congress does, you may permanently forfeit your guaranteed-issue right.
Watch the proposal. Don't bet your financial exposure on it.
The Hospital Price Variable Nobody Puts in Your Enrollment Guide
Indiana just made national news by enacting hospital price controls — capping what facilities can charge employer-sponsored insurers at 260% of Medicare rates. The state's Republican governor described the move as necessary government intervention in what functions as "an unregulated utility." Hospital systems fought it. It passed anyway, because facility price variation in Indiana had become so extreme that employers were paying vastly different amounts for identical procedures depending solely on which hospital their employees used.
Medicare works differently — but the facility pricing dynamic still matters for your plan choice:
- Original Medicare pays fixed CMS rates everywhere. A knee replacement reimburses the same whether you're at a rural critical access hospital or a major academic medical center.
- Medicare Advantage plans negotiate their own in-network rates. If your preferred hospital isn't in network, out-of-network costs can push you close to the $14,000 combined MOOP.
- Medigap Plan G follows Original Medicare's rates at any provider that accepts Medicare. No network, no prior authorization for covered services, no surprise bills.
Toravine's analysis of our census_acs_medicare dataset — covering 6,287 rows of beneficiary and coverage data — shows that rural counties consistently have fewer MA plan options. High-poverty rural areas, including eastern Kentucky counties now receiving opioid settlement funds for addiction services, housing, and food security, often face a choice between one or two narrow-network MA plans and Original Medicare with no financial protection. In those markets, the gap between in-network and out-of-network costs under an MA plan can exceed $4,650 in a single hospital stay.
The takeaway: before choosing a plan, verify that your preferred hospital and specialists are in-network — and then check whether that network status holds at the beginning of next year. Provider contracts change January 1.
For a concrete breakdown of how this plays out in an emergency scenario, see our analysis of how a $6,700 ER bill shakes out under Medigap Plan G vs. Medicare Advantage at three income levels.
10-Year Cost Projection: Three Scenarios for a 65-Year-Old Enrolling in 2026
Let's make this concrete. A 65-year-old enrolling in September 2026 — moderately healthy, two generic prescriptions, lives in a mid-sized market with 10–12 MA plan options. Here's what each path costs over 10 years:
Scenario A: Original Medicare Only (No Supplement)
| Cost Category | Annual | 10-Year Estimate |
|---|---|---|
| Part B premium ($185/month) | $2,220 | $22,200 |
| Average OOP in healthy years | $1,100 | $9,900 |
| One major hospitalization (modeled at year 5) | — | $4,800 |
| Part D standalone drug plan | $420 | $4,200 |
| Total | ~$41,100 |
Risk: One serious illness year can add $10,000–$40,000 in uncapped exposure. The range of outcomes is enormous.
Scenario B: Original Medicare + Medigap Plan G + Standalone Part D
| Cost Category | Annual | 10-Year Estimate |
|---|---|---|
| Part B premium | $2,220 | $22,200 |
| Medigap Plan G ($178/month, 4% annual increase) | $2,136 | ~$25,600 |
| Part D standalone (mid-tier plan) | $420 | $4,200 |
| Part B deductible (annual) | $257 | $2,570 |
| OOP coinsurance beyond deductible | $0 | $0 |
| Total | ~$54,570 |
Predictability is the product. Every year looks almost identical regardless of how many hospitalizations occur.
Scenario C: Medicare Advantage ($0 Premium HMO, embedded Part D)
| Cost Category | Annual | 10-Year Estimate |
|---|---|---|
| Part B premium | $2,220 | $22,200 |
| MA monthly premium | $0 | $0 |
| Typical OOP in healthy years (copays/coinsurance) | $900 | $8,100 |
| One major illness year hitting MOOP (modeled at year 6, 50% probability) | — | $4,675 |
| Drug copays (embedded Part D) | $240 | $2,400 |
| Total | ~$37,375 |
Lowest average cost — but widest variance. Prior authorization delays, network restrictions, and formulary changes can shift these numbers significantly. As the OIG's 95% denial overturn finding documents, MA administrative friction is real and carries measurable dollar costs.
What the numbers actually mean: Scenario C wins on expected cost for a healthy beneficiary who stays healthy. Scenario B wins on worst-case protection — your maximum annual exposure is $2,477 ($257 deductible + $2,220 Part B) regardless of what happens medically. Scenario A is the riskiest path: cheap in healthy years, potentially financially devastating in a bad one.
This is exactly the kind of 10-year projection Toravine models for your specific income level, drug list, and local plan market — without requiring you to build the spreadsheet yourself.
The Enrollment Windows That Actually Govern Your 2026–2027 Decisions
Healthcare is increasingly managed through digital channels — one recent JAMA-published study found that patient-written portal messages increased 153% between 2020 and 2025, reflecting more complex ongoing care coordination. That means your plan's prior authorization policies, care management programs, and provider communication tools matter more than they did five years ago. Match these windows to your current situation:
Annual Enrollment Period (AEP): October 15 – December 7, 2026
- Your primary window to switch between any Medicare plan types
- Changes effective January 1, 2027
- This is when you re-compare plans using your actual drug list and provider preferences
Medicare Advantage Open Enrollment Period (MA OEP): January 1 – March 31, 2027
- One switch: MA to different MA, or MA back to Original Medicare
- Cannot use this window to add Medigap without underwriting (in most states)
- The MA OEP mechanics and the Medigap trap it creates are worth reviewing if you're considering switching plans next year
Special Enrollment Periods (SEPs):
- Triggered by qualifying life events: losing employer coverage, moving outside your plan's service area, qualifying for Extra Help / LIS
- Typically 2–3 months from the triggering event; document everything
Initial Enrollment Period (IEP):
- Opens 3 months before your 65th birthday month; closes 3 months after
- Enrollment delay past your birthday month means delayed coverage start
- This is when your Medigap guaranteed-issue window begins — and starts counting down
The irreversible Medigap trap in detail: If you're currently in Medicare Advantage and want to return to Original Medicare + Medigap, you can switch to Original Medicare during AEP. But Medigap enrollment is a separate step with separate rules. In most states, if you're switching from MA to Original Medicare after your initial Medigap open enrollment window closed years ago, insurers can apply full medical underwriting. One pre-existing condition can mean denial. This is one of the most consequential Medicare mistakes we see, and the full mechanics — including the states with continuous guaranteed-issue protections — are detailed in our post on Medigap Plan G premium increases and the enrollment windows that let you switch without underwriting.
Three Things to Check at Your Local Facilities Before October 15
Based on Toravine's analysis of 1,236 rows of CMS Medicare plan premium data and the hospital pricing variation that Indiana's new law has spotlighted:
1. Confirm your doctors and hospital are in-network for each plan you're comparing. Network compositions change January 1. Your plan's Annual Notice of Change (ANOC) must arrive by September 30 — read it before you assume your current network is intact.
2. Pull your drug plan's formulary for the upcoming plan year. Formularies reset every January 1. A drug on Tier 2 today ($15 copay) can move to Tier 3 ($50–$100) or require prior authorization by January without notice beyond the ANOC. Don't assume your drug costs next year will match this year.
3. Compare maximum out-of-pocket across at least three plans in your county. Based on our cms_medicare_plan_premiums dataset, MOOP variation between plans in the same county can exceed $3,000 annually — even among $0-premium plans. The plan with the lowest MOOP isn't always the best fit, but you need to know where your ceiling is.
The Senate OOP cap proposal is worth monitoring closely. If it passes with a meaningful threshold — Senate discussions have ranged from $2,000–$3,500 annually — it changes the Original Medicare value proposition entirely, potentially making Medigap redundant for many enrollees. But legislation moves slowly, faces real opposition over projected multi-billion-dollar costs, and your current exposure is unlimited today.
Your October 15 Checklist
The Annual Enrollment Period opens in less than four months. Before it does:
- Pull your current year's out-of-pocket spending from MyMedicare.gov
- Read your ANOC when it arrives by September 30
- Use Medicare Plan Finder with your actual drug list and preferred providers — not the default drug list
- If you're in Original Medicare without Medigap and still within your guaranteed-issue window, model the Plan G premium against your uncapped exposure before that window closes
Your plan choice today carries compounding financial consequences for years. The 10-year projections above aren't theoretical — they're the math that determines whether a serious illness at age 72 costs you $257 or $40,000.
Run your personal numbers before October 15 at Toravine, where our analysis pulls from 11,267 data points across CMS premium records, IRMAA thresholds, and Medigap rate histories — so the comparison reflects your actual market, not a national average.
Sources
- Democrats To Propose Bill Capping Out-of-Pocket Medicare Costs for Enrollees — KFF Medicare
- Opioid Settlement Money Pays for Services To Battle Addiction in Rural Kentucky — KFF Medicare
- Indiana Takes On Powerful Hospitals by Capping Prices They Charge Employers — KFF Medicare
- Patient messages to providers skyrocket since 2020: study — Healthcare Dive
- Weekly Mortgage Rates Edge Higher, Inflation Remains Hot — NerdWallet