Medicare Advantage Out-of-Pocket Maximum: What It Actually Costs When Your Parent Gets Sick

The $0 premium is the number that gets your parent to say yes. The out-of-pocket maximum is the number that matters when something goes wrong.

Every Medicare Advantage plan has a Maximum Out-of-Pocket limit — the MOOP — which caps what a member pays in covered medical costs in a calendar year. In 2026, CMS allows Medicare Advantage plans to set that cap as high as $9,350 for in-network care, and up to $14,000 if the plan includes out-of-network coverage. Once your parent hits the MOOP, the plan pays 100% of covered costs for the rest of the year.

That sounds like protection. It is — but adult children need to understand what sits between the $0 premium and the $9,350 ceiling, because the gap is where real families get caught.

How the Out-of-Pocket Maximum Actually Works

The MOOP is a ceiling, not a floor. Your parent won't automatically pay $9,350. They pay only what they accumulate through daily copays, coinsurance, and deductibles as they use care. The MOOP is simply the point where the meter stops.

The structure looks like this for a typical Medicare Advantage HMO in 2026:

• Primary care visit: $0–$10 copay
• Specialist visit: $30–$50 copay per visit
• Inpatient hospital: $350–$500 per day for days 1–6, then $0
• Emergency room: $100–$120 copay (waived if admitted)
• Skilled nursing facility (SNF): $0 for days 1–20, then $150–$200/day for days 21–100
• Outpatient surgery: 10–20% coinsurance

The math adds up fast. A five-day hospital stay at $400/day hits $2,000. Add the physical therapy and SNF stay after discharge, a few specialist follow-ups, and an MRI — and a single serious illness can push a parent past $5,000 in out-of-pocket costs within a few months.

What "No-Premium" Plans Actually Cost

No-premium Medicare Advantage plans — plans with a $0 monthly plan premium on top of the Part B premium — represent the majority of plans enrolled today. In 2026, approximately 60% of Medicare Advantage plans carry a $0 plan premium.

The appeal is real. A healthy 66-year-old who visits the doctor twice a year and takes no expensive medications might spend under $100 total in a $0-premium plan. That's a better deal than paying $120–$180/month for a Medigap supplement.

But the trade-off is exposure. The no-premium plan passes cost back to the member through that copay-and-coinsurance structure instead. When your parent is healthy, that friction is minimal. When your parent is sick, it accelerates.

Here's an honest cost comparison for a parent with a serious illness in 2026:

In a bad health year, Original Medicare with a Medigap Plan G frequently costs less than a $0-premium Medicare Advantage plan — and provides better access to specialists and hospitals, with no prior authorization friction.

In-Network vs. Out-of-Network MOOP: The Hidden Split

Most Medicare Advantage plans set separate MOOP limits for in-network and out-of-network care. The in-network MOOP might be $5,500. The combined in- and out-of-network MOOP might be $9,350. These are different numbers — and they don't accumulate toward the same bucket.

If your parent sees a specialist who turns out to be out-of-network (a common surprise), those costs count toward the combined MOOP, not the lower in-network cap. This is why the network check matters before enrollment, not after.

For PPO plans specifically: out-of-network care is available but often charged at 30–40% coinsurance instead of fixed copays. A $20,000 surgery billed out-of-network at 40% coinsurance = $8,000 before the MOOP kicks in.

HMO plans generally don't cover out-of-network care at all except in emergencies. If your parent's specialist is out of network in an HMO, the plan pays nothing — that bill falls entirely on your parent, and it doesn't count toward any MOOP.

How to Compare Plans on Out-of-Pocket Cost

When using Medicare.gov's Plan Finder, the default sort is by premium. That's the wrong sort for most families evaluating a parent with any chronic condition.

Sort by "Estimated Total Drug + Premium Cost" first. Then check these three fields for each plan under consideration:

1. In-network MOOP — the maximum your parent pays for in-network covered care in a year
2. Out-of-network MOOP — only relevant for PPOs
3. Hospital daily copay structure — specifically days 1–6, because that's where hospitalizations concentrate their cost

Also check: does the plan have a separate deductible before cost-sharing kicks in? Some plans add a $0 in-network deductible but charge $500+ for out-of-network care before coverage begins.

The Plan Finder shows a star-rated quality score for each plan. CMS recommends avoiding plans with fewer than 3.5 stars. In 2026, plans with 4+ stars tend to have lower denial rates for prior authorization — which affects how quickly your parent gets the care they need, not just how much it costs.

The MOOP Doesn't Cover Everything

A critical point that surprises families: the out-of-pocket maximum only counts costs for covered services from in-network providers. It does not include:

• Part D prescription drugs — Part D has its own $2,100 out-of-pocket cap in 2026, which is separate from the medical MOOP
• Non-covered services — dental, vision, and hearing under the base Medicare Advantage benefit are often included as extras, but specific procedures within those categories may not be
• Out-of-network costs in an HMO — if the plan simply doesn't cover out-of-network, those bills don't accumulate toward any cap
• Balance billing from non-participating providers — though this is rare under Medicare rules

In a catastrophic year, your parent could theoretically hit the $9,350 medical MOOP and the $2,100 drug cap simultaneously — $11,450 total, not counting any non-covered service costs, on top of the Part B premium they're paying regardless.

When the MOOP Argument Favors Medicare Advantage

There are cases where the Medicare Advantage out-of-pocket structure works in your parent's favor:

Healthy seniors with low utilization. If your parent is in good health, rarely needs specialist care, and takes generics only, the $0 premium combined with low annual copays typically beats the fixed premium cost of a Medigap plan. A healthy person might spend $200–$500 total in a $0-premium MA plan vs. $2,000+ in Medigap premiums.

Plans with low MOOP limits. Not all MA plans set their MOOP at the maximum allowed. Some plans in competitive markets set their in-network MOOP at $3,500–$5,000. For these plans, the catastrophic protection is closer to what Medigap provides. Use the Plan Finder to find the lowest available MOOP in your parent's county.

The strategic caveat. The challenge is that health status changes. A parent who is healthy at 65 and joins a $0-premium MA plan may develop a serious condition at 72. At that point, switching to Medigap requires passing medical underwriting in most states — and a 72-year-old with diabetes and heart disease will often be denied or charged premiums that make the switch financially impossible. The lower cost today can become a trap later.

What This Means for Your Decision

The out-of-pocket maximum should anchor your plan comparison, not the premium. Specifically:

• If your parent has any chronic condition — diabetes, heart failure, COPD, cancer history — model a scenario where they use significant care and compare total annual cost across plans, including the MOOP
• If your parent is in excellent health at 65, a $0-premium plan with a reasonable MOOP can save real money year over year
• If your parent values access to any specialist without referral or prior authorization, Original Medicare + Medigap provides that at the cost of a higher fixed premium
• If your parent lives in a state with the Medigap birthday rule (California, Oregon, Idaho, Illinois, Nevada, Louisiana, Kentucky, Maryland), they have an annual window to switch Medigap plans without underwriting — which gives them more flexibility if they want to try an MA plan first

Sorting out the right answer for your parent's specific health profile, medications, doctors, and risk tolerance is exactly the kind of analysis that takes hours to do correctly — and where a mistake can cost thousands per year.

Our Medicare Enrollment Guide walks you through this cost comparison framework step by step, with scenario modeling for healthy, chronic, and catastrophic health profiles, a plan comparison worksheet, and a checklist of every question to ask before your parent signs up for any Medicare Advantage plan.

Get the Medicare Enrollment Guide