High-Deductible Plan G: 2026 Guide
By Tyler Dalton, PharmD, Licensed Medicare Agent Published Updated
High-Deductible Plan G is standard Plan G with a waiting line: you pay the first $2,950 of Medicare-covered cost sharing in 2026, and after that it covers everything Plan G covers. In exchange, the premium is a fraction of standard Plan G's. It is catastrophic protection for people who can comfortably self-fund a bounded deductible.
How High-Deductible Plan G works
HD-G is a standardized Medicare Supplement plan with exactly one difference from standard Plan G: an annual deductible, set at $2,950 for 2026, that you satisfy before the plan pays benefits. Until you reach it, you pay the cost sharing Original Medicare leaves behind. Once you reach it, HD-G behaves identically to Plan G for the rest of the calendar year, covering the Part A deductible, hospital and skilled nursing coinsurance, the 20% Part B coinsurance, and Part B excess charges.
You keep everything else people buy Medigap for: any doctor or hospital in the country that accepts Medicare, no networks, no referrals, and standardized benefits that never change underneath you.
How the deductible accumulates
The deductible is not a bill you pay the insurance company. It fills up as you pay Medicare-covered cost sharing during the year. Spending that counts includes the Part A hospital deductible ($1,736 per benefit period in 2026), Part A coinsurance, the Part B annual deductible ($283), and your 20% share of Part B services. One significant hospital stay gets you most of the way there on its own: the Part A deductible alone covers well over half of the $2,950.
One quirk carried over from standard Plan G: the $283 Part B deductible counts toward your $2,950, but it is never reimbursed by the plan, since Plan G benefits exclude it. In a worst-case year, your total Medicare-covered cost sharing is capped at the $2,950 deductible.
HD-G versus standard Plan G
| Feature | High-Deductible Plan G | Standard Plan G |
|---|---|---|
| Monthly premium | Much lower | Higher, for first-dollar-style coverage |
| Annual deductible | $2,950 in 2026 | None beyond the $283 Part B deductible |
| Coverage after the deductible | Identical to Plan G | Identical to HD-G |
| Worst-case Medicare cost sharing per year | $2,950 | $283 |
| Provider access | Any Medicare-accepting provider | Any Medicare-accepting provider |
| Best fit | Healthy, cash-reserved, premium-averse | Maximum predictability, frequent care |
The math framing, without invented numbers
Premiums vary by carrier, age, and rating structure, so the honest comparison uses your actual quotes. The framework is simple: take standard Plan G's annual premium minus HD-G's annual premium. That difference is what you save every year by choosing HD-G. Compare it against your worst-case extra exposure, which is the gap between the $2,950 HD-G deductible and the $283 you would have paid under standard G anyway. If the annual premium savings cover a meaningful share of that gap, HD-G wins in most years and loses only modestly in bad ones, and the savings compound in every healthy year. If the premium difference at your age is small, standard G's certainty is cheap and probably worth it. Our Medicare calculators can run this comparison with real quotes.
Who HD-G fits
- People with cash reserves. The plan only works if a $2,950 year is an annoyance, not an emergency. An earmarked savings cushion equal to one deductible makes the whole strategy sound.
- Healthy enrollees who resent premiums. If you use little care, most years you pay the low premium plus a few small bills and keep the difference.
- People who want catastrophe insurance, not bill insurance. HD-G is built for the year that goes wrong, and it caps that year at a known number while preserving full Medigap doctor freedom.
- Budget-minded shoppers comparing against Medicare Advantage. HD-G offers a low-premium option that keeps any-Medicare-doctor access, a combination Advantage plans cannot match, though Advantage may still win for someone who values built-in drug coverage and extras.
The risks, stated plainly
First, you will pay real bills early in a bad year, and some people find that harder in practice than on paper; if a deductible would make you delay care, this is the wrong plan. Second, the deductible resets every January, so back-to-back rough years mean paying it twice. Third, CMS adjusts the deductible annually, so it will drift upward over time. Fourth, switching to standard Plan G or Plan N later usually requires underwriting in Alabama, so buy HD-G only if you are content to keep it after your health changes.
Availability and enrollment
HD-G arrived in 2020 as the successor to High-Deductible Plan F, which, like standard Plan F, closed to people newly eligible for Medicare on or after January 1, 2020. HD-G itself is open to any Medigap-eligible buyer. Not every carrier offers it in every Alabama county, so the shopping pool is smaller than for standard G. The purchase rules are standard Medigap: your 6-month open enrollment window, starting when you are 65 or older with Part B, is when carriers must issue the plan without health questions. Dalton Insurance Agency can pull HD-G availability and pricing for your county and put it next to standard G and Plan N so the decision is arithmetic instead of guesswork.
Frequently asked questions
- Do my premiums count toward the HD-G deductible?
- No. Only out-of-pocket spending on Medicare-covered cost sharing counts: the Part A hospital deductible, Part A coinsurance, the Part B deductible, and the 20% Part B coinsurance you pay before the plan starts helping. Premiums, dental bills, and prescription costs under your Part D plan do not count.
- Does the $2,950 deductible reset every year?
- Yes, it runs on the calendar year and resets each January 1. CMS also adjusts the high-deductible amount annually, so the figure can change from year to year; $2,950 is the 2026 amount. Budgeting for HD-G means being ready to cover the full deductible in any single year.
- Is High-Deductible Plan G risky?
- It is bounded risk, which is the key point. Your exposure to Medicare-covered cost sharing is capped at the deductible, $2,950 in 2026, and after that HD-G pays like standard Plan G. Compare that to Original Medicare alone, where the 20% coinsurance has no ceiling at all. The plan fits people who can absorb the deductible without strain.
- Do I still need a Part D drug plan with HD-G?
- Yes. HD-G, like every Medigap plan, covers medical cost sharing only. You add a standalone Part D plan for prescriptions, which in 2026 can charge at most a $615 deductible and caps your covered drug spending at $2,100 out of pocket.
- Who is allowed to buy High-Deductible Plan G?
- Anyone eligible for Medigap can buy High-Deductible Plan G where a carrier offers it. The plan was introduced in 2020 alongside the rule that closed Plan F and High-Deductible Plan F to people newly eligible on or after January 1, 2020. The best time to buy is your 6-month Medigap open enrollment window, when no health questions apply.
- Can I switch from HD-G to standard Plan G later?
- Only by applying, and in Alabama that generally means medical underwriting once your original 6-month window has passed. The carrier can approve you, charge more, or decline based on health history. Treat the HD-G decision as durable rather than assuming you can trade up after a diagnosis.
Want to see whether HD-G beats standard G at your age?
Talk through your options with Tyler Dalton, PharmD, Licensed Medicare Agent. Consultations are free, and you keep the final say on every decision.