Utah · Medigap for retirees who could self-insure
Do I Really Need Supplemental Insurance With Medicare?
Nobody makes you buy it. But Original Medicare on its own has no yearly out-of-pocket limit, and the six-month window to buy a supplement without health questions does not reopen. Here is what "I can afford it" actually has to cover, in 2026 numbers, for a Utah household deciding at 65.
The bottom line
- No, not by law. Original Medicare works without a supplement. The question is whether you want a ceiling on what it leaves you.
- What it leaves you has no ceiling. Medicare.gov: "There's no yearly limit on what you pay out-of-pocket, unless you have supplemental coverage, like a Medicare Supplement Insurance (Medigap) policy, or you join a Medicare Advantage Plan."
- The 2026 pieces: $1,736 per hospital benefit period (more than once a year is possible), $434 a day for hospital days 61–90, $217 a day for skilled nursing days 21–100, and $283 then usually 20% of everything on the Part B side.
- The real issue is the door, not the bill. The Medigap Open Enrollment Period is six months from Part B; after it, "your options to buy a Medigap policy may be limited and the policy may cost more." Utah's birthday rule helps people who already hold a policy, not people who skipped one.
- Who can genuinely skip it: people with retiree, employer, TRICARE For Life or federal coverage that pays after Medicare — they already have a supplement by another name.
- Middle paths exist. High-deductible Plan G ($2,950 in 2026), Plan K ($8,000 limit) and Plan L ($4,000 limit) are standardized ways to buy the ceiling without the full premium.
This question comes from a particular kind of person, and I want to answer it for that person. Not someone stretching a Social Security check — someone who ran the numbers, saw a Medigap premium of a few thousand dollars a year for life, and thought: I have the savings, I am healthy, why would I pay an insurance company to cover a bill I could write a check for? It is a fair question. It deserves an answer that respects the math instead of a lecture about peace of mind. So here is what Original Medicare actually leaves you in 2026, what a bad year looks like in those terms, and the one fact that turns a math problem into a decision about time.
What Original Medicare leaves you, in 2026
Everything below is from Medicare.gov's Medicare costs page, confirmed against the CMS fact sheet that set the 2026 figures. The left column is what you pay; the right column is the sentence Medicare.gov uses about the ceiling.
| Service | Your share in 2026 | The ceiling |
|---|---|---|
| Hospital admission (Part A) | $1,736 per benefit period, then $0 a day for days 1–60 | None on the number of benefit periods — "you may pay the deductible more than once in a year." |
| Long hospital stay (Part A) | $434 a day for days 61–90; $868 a day for the 60 lifetime reserve days | "After day 150: You pay all costs." |
| Skilled nursing after a qualifying stay (Part A) | $0 for days 1–20, then $217 a day for days 21–100 | "Days 101 and beyond: You pay all costs." |
| Doctors, outpatient care, Part B drugs (Part B) | $283 once a year, then "usually 20%" of the Medicare-approved amount | "There's no yearly limit on what you pay out-of-pocket." |
| Hospital outpatient copays (Part B) | A copay per service, never more than $1,736 for a single service | "Your total copayment for all outpatient services may be more than the inpatient hospital deductible." |
Sources: Medicare.gov — Medicare costs (2026); Medicare.gov — Inpatient or outpatient hospital status affects your costs for the outpatient copay rule; CMS — 2026 Medicare Parts A & B Premiums and Deductibles (fact sheet).
Two rows carry the risk. The Part B row is the one people underestimate, because "20%" sounds like a copay and is actually a share of the whole year: the surgeon, the anesthesiologist, the outpatient surgery center, every scan, every physical therapy visit, and — this is the part that turns a bad year into a very bad one — drugs given in a clinic rather than picked up at a pharmacy, which are Part B, not Part D. Chemotherapy infusions, many biologics for rheumatoid arthritis or Crohn's, and injections for macular degeneration all land here at 20% with no annual cap. The Part A row is the one people overestimate on a single admission and underestimate over a year: $1,736 is manageable once, and Medicare.gov's point is that "you may pay the deductible more than once in a year."
A bad year, in those numbers
This is a stated assumption, not a statistic and not a quote: a year in which someone is admitted twice in separate benefit periods, spends 40 days in a skilled nursing facility after the second stay, and runs up $120,000 of Medicare-approved Part B charges across a surgery, a course of infusions, imaging and rehab. Original Medicare's share, using only the figures in the table:
| What happened | The arithmetic | You pay |
|---|---|---|
| Two hospital admissions in separate benefit periods | 2 × $1,736 | $3,472 |
| Skilled nursing, 40 days after the second admission | 20 × $217 | $4,340 |
| Part B: surgeon, oncology infusions, imaging, therapy on $120,000 of Medicare-approved charges | $283 + 20% of $120,000 | $24,283 |
| Total, Original Medicare alone | $32,095 |
Illustration on stated assumptions; the $120,000 is a chosen figure, not a measured one. Cost sharing from Medicare.gov. A Medicare Supplement Plan G would leave the $283 and pay the rest; Plans K and L would stop at their 2026 limits per Medicare.gov's benefit chart.
Roughly $32,095, and the year could have been bigger — the assumption stops the Part B charges at $120,000, and nothing in the rules does. For a household with seven figures in retirement accounts, that is not ruin. It is a withdrawal, taxable if it comes from an IRA, in a year that also pushes income into a higher Medicare premium tier two years later. The honest self-insurer's case is that most years are not this year, and that a couple of decades of skipped premiums may exceed one such bill. That case is real. It just is not the whole case.
The fact that changes the problem
Self-insuring would be a clean expected-value bet if you could buy the policy later, when the odds changed. You mostly cannot. Medicare.gov puts it this way: "The best time to buy a Medigap policy is during your Medigap Open Enrollment Period. This is the 6-month period that starts the first day of the month you're 65 or older and signed up for Part B. After this period, your options to buy a Medigap policy may be limited and the policy may cost more." Outside that window, and outside a handful of guaranteed-issue events, a Medicare Supplement application in Utah can ask health questions, and a company can decline or rate you on the answers.
That makes the decision at 65 a decision about the person you will be at 75. Someone who skips the policy and stays healthy wins the bet every year, until the year a diagnosis arrives — which is precisely the year the policy would pay for itself and precisely the year the application is hardest to get through. The premium is not really buying this year's 20%. It is buying the right to keep the ceiling in place in a year you cannot yet see.
Utah's Medigap birthday rule is often cited as the reason this does not matter here, and it is worth being exact about what it does. Utah Code §31A-22-620(3)(g) requires an issuer, for 60 days from an enrollee's birthday each year, to let "an enrollee that is enrolled in one of the issuer's Medicare supplement insurance plans" choose "a comparable or lower tier plan" without medical underwriting. The precondition is in the sentence: you have to be enrolled in a plan already. The rule is a door between plans, for people inside the building. It is not a door in from the street, and it will not rescue a self-insurer who wants a policy after the six months have passed. We walked through the rule's actual scenarios here.
Who really can skip it
The people for whom the answer is a clean "no, you don't need one" already have something that pays after Medicare. If that is you, the supplement question is answered by the coverage you have, not by this article.
- Retiree or employer coverage that coordinates with Medicare — a former employer's plan, a spouse's active-employer plan, PEHP or URS coverage in Utah's public sector. These typically pay some or all of what Medicare leaves. Read the plan document for how it pays once Medicare is primary; we compared PEHP's Medicare supplement with individual Medigap earlier this year.
- TRICARE For Life — military retirees with Parts A and B have TRICARE paying after Medicare, and a Medigap policy is generally redundant. The Utah details.
- Federal retirees keeping FEHB or PSHB — same structure, a plan that pays after Medicare, and usually no reason to add a supplement on top.
- A Medicare Advantage plan — not a supplement, a replacement for how you get Parts A and B, with its own yearly out-of-pocket maximum. You cannot pair it with Medigap. It is the other way to buy a ceiling, at the cost of a network and plan rules, and the choice between the two is its own article.
If none of those describe you and you are on Original Medicare alone, you are the person Medicare.gov's sentence is about. There is no ceiling, and the only question is whether you want to buy one.
Buying the ceiling without the full premium
The self-insurer's instinct is sound in one respect: paying a full premium to cover small, predictable bills is inefficient. Medicare's standardized plans include three built for exactly that instinct, and Medicare.gov's benefit chart gives their 2026 numbers.
- High-deductible Plan G. "You must pay up to $2,950 in 2026 for Medicare-covered costs (coinsurance, copayments and deductibles) before your policy pays anything." You self-insure the first $2,950; the policy owns everything past it — including the $32,095 year above. We ran the break-even yesterday for Colorado; the federal numbers are the same in Utah.
- Plan K and Plan L. They pay a percentage of most cost sharing rather than all of it, and then "pay 100% of covered services for the rest of the calendar year after you meet your out-of-pocket yearly limit" — $8,000 for K and $4,000 for L in 2026. A defined worst case, with a lower premium than the plans that leave you nothing.
- The HSA angle for higher-income households. IRS Publication 969 bars using HSA money for "premiums for a Medicare supplemental policy, such as Medigap," but Medicare deductibles, coinsurance and copayments are qualified medical expenses. A retiree with a large HSA who picks a high-deductible or K/L plan gets to pay the layer they kept — the $2,950 or the $4,000 — with pre-tax dollars, while the layer they gave to the insurer is capped. That is a cleaner structure than either self-insuring everything or paying a full premium with after-tax money. Confirm it with your tax advisor; that is their lane.
What none of these change is the timing. High-deductible G, K and L are Medigap plans, and the six-month open enrollment applies to them exactly as it applies to standard Plan G. Buy the cheap ceiling at 65 and Utah's birthday rule will later let you move to a comparable or lower-tier plan each year; skip it and there is nothing to move from.
Why the answer is sharper in rural Utah
Grand County has one hospital — Moab Regional Hospital, a critical access facility per the CMS hospital file — and no oncology infusion center, cardiac catheterization lab or joint-replacement program of its own. The bad year in the table above does not happen in Moab; it happens in Grand Junction or Salt Lake City, three to four hours away, and the 20% is 20% of a tertiary hospital's approved charges. Per CDC PLACES, 33.3% of Grand County adults live with high blood pressure and 11.2% with diabetes, the two conditions most likely to produce the admissions and the specialist years that fill the Part A and Part B rows. Self-insuring in a place where serious care means travel is self-insuring the biggest bills, not the small ones.
The same logic runs across rural Utah — Carbon, Emery, San Juan, Kane, the Uintah Basin. If your care would be delivered in a regional center, the no-ceiling row is the one to price, and it is the one that a supplement, of whatever size, exists to close.
What I would do
If you are turning 65 with the savings to self-insure, I would not talk you out of the instinct — I would have you spend it on the right layer. Buy a ceiling during the six months when nobody can ask about your health, size the deductible to what you are comfortable writing a check for, and pay that layer from an HSA if you have one. Skip the supplement only if something you already have pays after Medicare. And I would decide it this fall, not next year, because the one thing money cannot buy back is the enrollment window.
How we know all this: the Medicare On Main Data Desk frames every article with public data. The "no yearly limit on what you pay out-of-pocket" sentence, the $1,736 Part A deductible per benefit period, the "more than once in a year" sentence, the $434 and $868 daily hospital amounts, the $217 skilled nursing coinsurance, the $283 Part B deductible and the "usually 20%" coinsurance are quoted from Medicare.gov's Medicare costs page and confirmed against the CMS fact sheet on 2026 Medicare Parts A and B premiums and deductibles, which also sets the $202.90 standard Part B premium. The single-service outpatient copay cap and the "total copayment ... may be more" sentence are from Medicare.gov's hospital-status page. The 6-month Medigap Open Enrollment Period and the "may be limited and the policy may cost more" sentence are from Medicare.gov's When can I buy Medigap page. The $2,950 high-deductible amount and the $8,000 / $4,000 Plan K and L limits are from Medicare.gov's Medigap benefit chart. The birthday-rule language is quoted from Utah Code §31A-22-620(3)(g). The HSA rule is from IRS Publication 969. The bad-year table is an illustration on stated assumptions, not a measurement. Hospital data is from the CMS Hospital General Information dataset; county chronic-condition prevalence is CDC PLACES County Data 2023. No Medigap premium, rate, company or product is stated or endorsed. This is education, not financial, tax or enrollment advice — review your own situation with a licensed agent or Medicare.gov, and the HSA and withdrawal questions with your tax advisor.
Frequently asked questions
Do I really need supplemental insurance with Medicare?
No law requires it, and some people genuinely don't — anyone with retiree, employer, TRICARE For Life or federal-employee coverage that pays after Medicare already has a supplement in everything but name. For everyone else the honest answer is that Original Medicare by itself has, in Medicare.gov's words, "no yearly limit on what you pay out-of-pocket." Part B leaves you 20% of every Medicare-approved outpatient charge with no ceiling, and Part A charges the $1,736 hospital deductible per benefit period, more than once a year if you are admitted more than once. A supplement — Medigap — is how you put a ceiling on that. Whether you buy one is a decision about risk, not about whether you can pay a routine bill.
What happens if you have Medicare but no supplemental insurance?
You pay the pieces Original Medicare leaves: the $283 Part B deductible, then usually 20% of the Medicare-approved amount for doctors, outpatient surgery, imaging, therapy and drugs given in a clinic, plus $1,736 for each hospital benefit period, $434 a day for hospital days 61–90 and $217 a day for skilled nursing days 21–100. In a quiet year that is a few hundred dollars. In a year with a cancer diagnosis or a bad fall it is whatever 20% of the year's approved charges turns out to be, and nothing stops the meter. Medicare.gov notes one small cap — a single hospital outpatient copay "can't be more than the inpatient hospital deductible" — and immediately adds that the total of all of them can be.
Can I self-insure instead of buying Medigap?
You can, and for someone with real savings the arithmetic in a normal year favors it — the premiums you skip are certain and the 20% you owe is usually small. The reason it is still a hard call is that the decision is not reversible on your terms. Medicare.gov says your Medigap Open Enrollment Period is "the 6-month period that starts the first day of the month you're 65 or older and signed up for Part B," and after it "your options to buy a Medigap policy may be limited and the policy may cost more." A diagnosis at 72 is exactly when you would want the policy and exactly when a company can decline you. Self-insuring is a bet that you will never want to change your mind after the window closes.
Is Medigap worth it if I'm healthy?
Healthy is when it costs the least to buy and is easiest to be approved, which is a different question from whether you will use it this year. Nobody buys a supplement for the year they are healthy; they buy it during the 6-month open enrollment because that is the one time the application has no health questions in most cases. Utah's birthday rule does not change that — the statute lets "an enrollee that is enrolled in one of the issuer's Medicare supplement insurance plans" move to a comparable or lower-tier plan each year without underwriting, which helps people who already hold a policy and does nothing for someone who has none.
What is the least expensive way to cap Medicare costs without a full Medigap plan?
Medicare standardizes several middle paths, and Medicare.gov's benefit chart lists their numbers for 2026: high-deductible Plan G leaves you the first $2,950 of Medicare-covered coinsurance, copayments and deductibles and pays everything after; Plan K has an out-of-pocket limit of $8,000 and Plan L of $4,000, after which the plan pays 100% for the rest of the calendar year. A Medicare Advantage plan is the other route — it has its own yearly out-of-pocket maximum in exchange for a network and plan rules. Which one fits is a comparison, not a slogan; we do not quote premiums here because they vary by company, age and where you live.
Does Medicare On Main charge for help deciding?
No. Brian Penner is an independent, licensed Medicare advisor with 22+ years of experience — paid by the carriers, not by you. We serve all of Utah from our Moab office at 880 S Main St; call (435) 260-3200. Walking through what Original Medicare leaves you, and which of the standardized plans puts a ceiling on it, is free, local and no-pressure. We do not offer every plan available in your area, and we'll say so when Medicare.gov or 1-800-MEDICARE is the better next call.
Sources
- Medicare.gov — Medicare costs (2026) — the no-yearly-limit sentence and every 2026 Part A and Part B figure.
- CMS — 2026 Medicare Parts A & B Premiums and Deductibles (fact sheet) — the same figures, from CMS.
- Medicare.gov — Inpatient or outpatient hospital status affects your costs — the outpatient copay cap and its limit.
- Medicare.gov — When can I buy Medigap? — the 6-month Medigap Open Enrollment Period.
- Medicare.gov — Compare Medigap Plan benefits — high-deductible G, Plan K and Plan L amounts for 2026.
- Utah Code §31A-22-620 — Medicare Supplement Insurance Minimum Standards Act — subsection (3)(g), the birthday rule and its "enrolled in one of the issuer's ... plans" precondition.
- IRS Publication 969 — Health Savings Accounts — the Medigap-premium exclusion and qualified medical expenses.
- CMS Hospital General Information (data.cms.gov) · CDC PLACES, 2023 — via the Medicare On Main Data Desk — Grand County's hospital and chronic-condition prevalence.
