Medicare 100 Day SNF Benefit: 2026 Costs, Day by Day

Take Medicare's 2026 inpatient hospital deductible — $1,736 — and divide it by eight.

That is the whole secret of the number families meet on day 21 of a skilled nursing stay. $217.00 a day is not a rate the facility set, not a figure a caseworker picked, and not a percentage of anything the facility actually charges. It is an eighth of a deductible, carried over from the hospital side of Part A by a regulation written in 1983, and it changes every January whether anyone in the building mentions it or not.

The 100 days below run in order: what has to happen before day 1, what "covered in full" means for days 1 through 20, what starts on day 21, and what does not arrive on day 101. Every dollar figure is a 2026 figure with a citation under it. For where SNF coverage sits among the four payers generally, the wider map is in who pays for long-term care.

One number, divided by eight

The rule that builds the whole cost table is 42 CFR 409.85. Paragraph (a)(2): for each day from the 21st through the 100th, the coinsurance is one-eighth of the applicable inpatient hospital deductible. Paragraph (b) promises that the specific amounts will be published in the Federal Register "no later than October 1 of the preceding year" — a promise worth smiling at, since the notice that set the 2026 amounts, 90 FR 52075, was published on 19 November 2025.

That notice fixes four numbers for 2026, and the SNF line is the only one most families will ever meet:

The arithmetic checks: $1,736 ÷ 8 = $217. The other lines are the same deductible cut into quarters and halves. One number moves and the whole column moves with it.

Run day 21 through day 100 at the 2026 rate and the maximum a beneficiary can owe in coinsurance for one benefit period is 80 × $217 = $17,360. That figure is worth writing down before an admission, not after, because it is the size of the hole that Medigap, retiree coverage, or a checking account is going to be asked to fill.

The counter needs a qualifying stay before it starts

None of the 100 days exist until the entry conditions are met, and the conditions are counted in a particular way.

42 CFR 409.30(a)(1) requires at least 3 consecutive calendar days as a hospital inpatient, "not counting the date of discharge," and paragraph (b)(1) requires admission to the SNF within 30 calendar days after that discharge. The Medicare Benefit Policy Manual, Chapter 8, section 20.1, spells out the count: the day of admission is counted as a hospital inpatient day, the day of discharge is not, and the 3 days can even be totaled across more than one hospital.

The trap inside this rule has its own name — observation status. Medicare.gov's SNF page states it flatly: time spent "at the hospital under observation or in the emergency room before you're admitted doesn't count toward the 3-day qualifying inpatient hospital stay, even if you're there overnight." A person can sleep in a hospital bed for four nights and have zero qualifying days on paper. The word that matters on the hospital paperwork is inpatient, and it is worth asking the hospital directly, each day, which status is on the chart.

Days 1 through 20: covered, not free

42 CFR 409.61(b) gives the shape of the benefit in three sentences. Up to 100 days are available in each benefit period after discharge from a hospital. For the first 20 days, Medicare pays for all covered services; for the 21st through the 100th, it pays everything except the daily coinsurance.

Notice what the Medicare.gov cost page adds to that. Its line for days 1–20 reads: "You pay $0 each day after you pay the $1,736 deductible." The Part A deductible is charged once per benefit period, and in the normal sequence — hospital first, SNF second — it was already paid against the hospital stay. So for most families the first 20 SNF days really do produce no Part A charge. But the deductible belongs to the benefit period, not to the hospital, and a statement that shows it against the SNF stay is showing the same $1,736, not a second one.

"All covered services" is also narrower than the phrase sounds. It reaches the semi-private room, meals, skilled nursing and therapy, and most items the facility furnishes under consolidated billing — and it does not reach a private room chosen for comfort, a television rental, or anything the plan of care does not include. When the first monthly statement lands, the line-by-line anatomy is covered in reading a skilled nursing facility bill.

Day 21: the meter starts, and three details change who feeds it

From the 21st day, $217.00 per day in 2026 is the beneficiary's responsibility. Three qualifications sit in the rules, and each one has moved a real bill.

The coinsurance cannot exceed the actual charge. 42 CFR 409.85(c): if the actual charge to the patient for the day is less than the published coinsurance, the actual charge is the coinsurance. Rare in practice at 2026 facility rates, but it is in the regulation, not in the facility's discretion.

A liability finding wipes it. The Medicare General Information, Eligibility, and Entitlement Manual, Chapter 3, section 10.2, states that a beneficiary is not responsible for the coinsurance for a stay if the provider has been determined liable because the care was not medically necessary or was custodial. Coinsurance attaches to covered days; a day ruled non-covered with provider liability is a different animal.

Someone else may be paying the line. Many Medigap policies pay some or all of the SNF coinsurance — the plan's own benefit chart is the document to check, since the standardized plans treat this line differently. A Medicare Advantage enrollee is not using this table at all: MA plans set their own SNF cost-sharing in the Evidence of Coverage, and the numbers on this page do not apply to them.

The only charge that changes price on January 1 by itself

42 CFR 409.85(a)(4) ties the coinsurance to "the calendar year in which the services were furnished." Not the year the stay began. A resident on coinsurance days in late December 2025 owed $209.50 for each of them; on 1 January 2026, without any decision by anyone in the building, the same bed in the same benefit period began costing $217.00 a day — a $7.50 daily increase, about $232 more across a 31-day month.

No letter announces this. It simply appears as a different figure on the next statement, and a family comparing December's statement to January's can mistake it for a billing error in either direction. It is the one line on a SNF bill that changes price with no reassessment, no rate letter, and no signature.

Day 101 arrives without a letter

Here is the part of the benefit that the notice system does not cover, and it is documented in an odd place — the manual that tells facilities when not to send notices.

When Medicare coverage ends early — the facility decides the care is no longer skilled, no longer daily — the resident gets a Notice of Medicare Non-Coverage two days ahead, and that notice opens a QIO fast appeal with a noon-next-day deadline. The mechanics and the phone call are in filing a fast appeal of a skilled nursing discharge.

Exhaustion is not that. The Medicare Claims Processing Manual, Chapter 30, section 261, uses it as the textbook example of coverage ending with nothing required in anyone's hands: "A beneficiary exhausts the 100 day benefit in a SNF. In this instance, the NOMNC should not be delivered. The SNFABN is not required in this situation." A facility may issue a notice voluntarily, as a courtesy. Nothing obliges it to.

The consequence is structural. The fast appeal runs on the NOMNC; with no NOMNC, there is nothing to fast-appeal, because no coverage decision was made — the days were simply used. On day 101 the facility's private rate applies, which CareScout's 2025 survey puts at a national median of $9,581 a month for a semi-private room, and the question stops being a Medicare question at all. It becomes the question the payer map exists to answer: Medicaid eligibility, a long-term care policy's trigger, or private funds.

One caution about the count itself. The 100 days belong to a benefit period, and under 42 CFR 409.61(c) they renew only when a new benefit period begins — which, under 42 CFR 409.60, takes 60 consecutive days with no inpatient hospital or SNF care. They do not reset in January, and a mid-stay hospital trip does not necessarily buy a fresh set. How that clock actually resets deserves its own article.

Three dates worth writing inside the admission folder

Everything above compresses into three dates a family can compute on the day of admission, before any statement exists.

1. The day the count starts — the SNF admission date, provided the 3-day inpatient stay and 30-day window at 42 CFR 409.30 were met. Ask the hospital to confirm inpatient status in writing before discharge, not after.
2. Day 21 — admission date plus 20. From that morning, $217.00 a day in 2026 accrues to someone other than Medicare. If a Medigap plan is supposed to catch it, this is the week to confirm the claim is set up.
3. Projected day 100 — admission date plus 99. No one is required to mark it for you. The facility's business office can state in writing how many benefit days remain; the Medicare Summary Notice and the beneficiary's Medicare.gov account track the count, and 1-800-MEDICARE or a SHIP counselor can read it back for free.

Most stays never reach the third date — coverage usually ends earlier, on a skilled-care determination, which is a fight with a form and a deadline attached. But for the stays that do run long, day 100 is the quietest deadline in the whole system, and the only one that arrives with no paper at all.

Sources

Every figure and quoted phrase above was checked against the source on 3 September 2026. The eCFR sections were read at title 42's issue date of 13 August 2026.

• 42 CFR 409.61 (up to 100 days per benefit period; all covered services for the first 20 days; daily coinsurance for days 21 through 100; renewal of the full 100 days each benefit period at paragraph (c)); 409.85 (coinsurance equal to one-eighth of the inpatient hospital deductible; the calendar-year rule at (a)(4); the actual-charge exception at (c); the October 1 publication promise at (b)); 409.30 (3 consecutive calendar days not counting the date of discharge, and the 30-calendar-day admission window); 409.60 (benefit period definition and the 60-day rule).
• CMS, Medicare Program; CY 2026 Inpatient Hospital Deductible and Hospital and Extended Care Services Coinsurance Amounts, 90 FR 52075 (19 November 2025): the $1,736 deductible and the $434 / $868 / $217 daily coinsurance amounts for 2026.
• Medicare.gov, Skilled nursing facility (SNF) care: the 2026 cost lines ("You pay $0 each day after you pay the $1,736 deductible," "You pay $217 each day," "You pay all costs") and the observation-status warning quoted above.
• Medicare Benefit Policy Manual (Pub. 100-02), Chapter 8, section 20.1 (Rev. 10880): the day of admission counted but not the day of discharge, stays totaled across hospitals, and observation and emergency room time excluded from the qualifying stay.
• Medicare Claims Processing Manual (Pub. 100-04), Chapter 30, section 261 (Rev. 2711): the benefit-exhaustion example — NOMNC should not be delivered, SNFABN not required, voluntary issuance permitted as a courtesy.
• Medicare General Information, Eligibility, and Entitlement Manual (Pub. 100-01), Chapter 3, section 10.2: the one-eighth / one-fourth / one-half coinsurance fractions and the provider-liability exception.
• CareScout Cost of Care Survey 2025 (fielded July–November 2025): the $9,581 national median monthly rate for a semi-private nursing home room.

This page is general information, not legal, medical, or financial advice. See the terms.