Medicare Skilled Nursing Rehab and the 100 Days in the DC Metro: What the Clock Actually Covers (2026 Guide)

By DC Senior Advisor Care Team · October 30, 2026

Why Medicare skilled nursing rehab 100 days in the DC metro rarely means a hundred days

The phone call almost always comes on a Tuesday afternoon, somewhere around day fourteen. A social worker at a rehab facility in Silver Spring or Alexandria explains, politely and quickly, that your mother's Medicare coverage ends Friday. You had been told she had a hundred days. What families discover in that moment is that Medicare skilled nursing rehab 100 days in the DC metro is a ceiling, not a promise — the outer limit of what Part A will pay inside a single benefit period, and nothing like a scheduled course of treatment. The average Medicare-covered stay in a skilled nursing facility runs closer to three or four weeks than to fourteen. Coverage lasts exactly as long as a facility can document that your parent needs daily skilled care, and it stops the day that documentation stops supporting it.

That gap between the number families hear and the number they get is where most of the damage happens. A discharge from MedStar Washington Hospital Center, Suburban Hospital or Inova Fairfax sets a clock running that nobody at the bedside explains in full, and the decisions that determine whether Medicare pays at all were often made days earlier, upstairs, in how the hospital classified the admission. Understanding four things — the qualifying stay, the daily-skilled-care test, the day-21 cost shift and the appeal window — is what separates families who use the benefit well from families who get a surprise invoice for twelve thousand dollars.

The three-day rule, and the observation status that quietly cancels it

Traditional Medicare pays for a skilled nursing stay only after a qualifying inpatient hospital stay of at least three consecutive days, and the day of discharge does not count toward those three. The catch is that time spent in a hospital bed is not the same thing as being an inpatient. If your father is held under observation status — monitored in the emergency department or on a floor while physicians decide whether to admit him — those hours are billed under Part B as outpatient care, and they do not count toward the three days, no matter how many nights he slept there. Families at MedStar Georgetown, George Washington University Hospital, Holy Cross, Virginia Hospital Center and Inova Alexandria run into this every week.

Federal rules require the hospital to hand over a Medicare Outpatient Observation Notice, usually called the MOON, within 36 hours when observation care passes 24 hours, and a staff member must explain it out loud. Treat that piece of paper as a financial alarm, not paperwork. Ask directly: is he admitted as an inpatient, and starting when? If the answer is observation and a rehab stay looks likely, ask the attending physician whether an inpatient admission is clinically justified, and ask the case manager to document the request. There is no formal appeal of observation status itself, which is precisely why the conversation has to happen while he is still in the building. One more wrinkle worth knowing: Medicare Advantage plans are not bound by the three-day rule, and many waive it — but they substitute prior authorization, so a plan can approve the rehab stay in principle and still deny the specific facility or the length of stay.

What Part A pays, and what changes on day 21

Inside a benefit period, the cost structure is blunt. Days 1 through 20 of a covered skilled nursing stay carry no coinsurance at all. Beginning on day 21, Medicare charges a daily coinsurance — a figure in the low-to-mid two hundreds per day that CMS resets every January — and it runs through day 100. After day 100, Part A pays nothing for skilled nursing care in that benefit period. A Medigap supplement typically picks up that days 21-100 coinsurance, which is the single most valuable thing a supplement does for a rehab stay; without one, a family looking at eighty coinsurance days is looking at roughly sixteen to seventeen thousand dollars.

The benefit period itself is the piece families misread most often. It opens on inpatient admission and closes only after your parent has gone 60 consecutive days without inpatient hospital or skilled nursing care. Two rehab stays six weeks apart therefore share one hundred-day allowance, so a February stay in Rockville can shorten what is available after a May fall in Arlington. Ask the facility's business office, in writing, how many benefit days have already been used before you assume a full hundred are waiting. And note what the benefit does not cover at all: a long-term custodial bed. Medicare pays for rehabilitation, not for the fact that someone can no longer safely live alone. When the skilled need ends, the bill converts to private pay at DC-metro nursing home rates of roughly $10,000 to $14,000 a month, or to Medicaid if your parent qualifies.

The daily skilled care test, and the improvement myth

Coverage requires a physician order, a Medicare-certified bed, and daily skilled care: skilled nursing seven days a week, or skilled therapy at least five days a week. That is why a weekend without therapy, a refused session, or a note reading "patient at baseline" can end a stay faster than any medical change. Participation is documentation. If your mother is sleeping through morning therapy because of a medication timing problem, that is a fixable issue worth raising with the nurse manager immediately rather than a reason for coverage to lapse.

The myth to discard is the idea that your parent must keep improving to keep coverage. Under the settlement in Jimmo v. Sebelius, Medicare coverage does not depend on improvement; skilled care that maintains a resident's condition or slows decline is covered when the services themselves require skilled personnel. Facilities still say "she's plateaued, so Medicare is cutting her off," because old habits die hard in rehab billing offices. When you hear it, say plainly that maintenance therapy is covered under Jimmo and ask for the clinical reason the skilled need has ended. In practice that one sentence buys more days than any amount of arguing about how hard your mother is trying.

The two-day notice and the fast appeal nobody uses

Before coverage ends, the facility must give you a Notice of Medicare Non-Coverage at least two calendar days before the last covered day. Those two days are not a courtesy — they are an appeal window. Call the Beneficiary and Family Centered Care Quality Improvement Organization whose phone number is printed on that notice, by noon of the day before coverage is set to end, and request an expedited review. The resident stays in place, and Medicare continues paying while the review runs. The reviewer is an outside physician panel, decisions usually come within 72 hours, and a meaningful share of these fast appeals succeed, mostly because the facility's documentation turns out to be thinner than its confidence. If your parent is on a Medicare Advantage plan, the fast-appeal route runs through the plan first and then to an independent review entity; the notice will say which.

If the appeal fails or you skip it, ask the facility for a demand bill — a formal claim submitted to Medicare so a contractor rather than the facility decides the coverage question. Keep the long-term care ombudsman program for your parent's jurisdiction in your contacts while all of this plays out; ombudsmen are free, independent, and unusually effective on discharge disputes. And verify the facility itself before anyone moves in: nursing homes are licensed by DC Health's Health Regulation and Licensing Administration in the District, by the Maryland Department of Health's Office of Health Care Quality as comprehensive care facilities, and by the Virginia Department of Health in Arlington, Alexandria and Fairfax. Inspection records are public in all three, and the gap between the tour and the survey report is often wide.

Planning for day 101 starting on day 3

The families who come through a rehab stay intact are the ones who treat discharge planning as a parallel project from the first week. By day three, you should know three things: how many benefit days are available, what the therapy team believes the functional ceiling looks like, and what home would need to look like for a safe return. If the answer is in-home help, DC-metro agency rates run roughly $30 to $40 an hour, which is affordable for a few hours a day and not for round-the-clock care. If it is assisted living, expect $5,500 to $8,500 a month, with memory care at $7,500 to $11,000 and the top of those ranges concentrated in upper Northwest DC, Bethesda and Chevy Chase, Friendship Heights and McLean, while Prince George's County and the outer suburbs run lower. Adult day programs at $85 to $120 a day are the option families forget, and often the one that makes a return to Hyattsville or Wheaton work.

Start the public-benefit conversation in the same week, because eligibility work takes longer than the rehab stay. In the District, long-term care Medicaid runs through the Department of Health Care Finance, with home and community-based services under the Elderly and Persons with Physical Disabilities Waiver, and the DC Department of Aging and Community Living at (202) 724-5626 is the front door for everything else. In Montgomery and Prince George's counties, it is Maryland Medical Assistance, with the Community Options Waiver and Community First Choice funding care at home; reach Montgomery County Aging and Disability Services at 240-777-3000, the Prince George's County Aging and Disabilities Services Division, or Maryland Access Point at 1-844-MAP-LINK. In Northern Virginia, Virginia Medicaid under the Cardinal Care umbrella covers nursing facility care through DMAS, the Auxiliary Grant helps with assisted living, and the Arlington Area Agency on Aging, Alexandria's Division of Aging and Adult Services and the Fairfax Area Agency on Aging handle intake. Veterans should ask about VA benefits in the same breath: the Washington DC VA Medical Center at 50 Irving Street NW, (202) 745-8000, and the VA Caregiver Support Line at 1-855-260-3274 are both worth a call before day 100 arrives.

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Common questions

Does Medicare really cover skilled nursing rehab for 100 days in the DC metro?

One hundred days is the maximum per benefit period, not an entitlement, and Medicare skilled nursing rehab 100 days in the DC metro only runs that long when a facility can document a continuing need for daily skilled care the entire time. Most covered stays end well before day 100 — often within three to five weeks — because the skilled need resolves. Days 1 through 20 carry no coinsurance; days 21 through 100 carry a daily coinsurance that CMS resets each January and that a Medigap policy usually absorbs. After day 100, Part A pays nothing for skilled nursing in that benefit period, and the bill converts to private pay or Medicaid. The clock also resets only after 60 straight days with no inpatient or skilled nursing care.

My father spent four nights at Virginia Hospital Center but was never admitted. Will Medicare pay for rehab?

Probably not under traditional Medicare, and this is the single most expensive surprise in DC-metro discharge planning. Part A requires a qualifying inpatient stay of three consecutive days, and the discharge day does not count. Nights spent under observation status are billed as outpatient care under Part B and do not count toward the three days regardless of how long they lasted. The hospital must give you a Medicare Outpatient Observation Notice, the MOON, within 36 hours once observation passes a day, and explain it verbally. Ask the case manager directly whether your father is inpatient and from what date, and ask the attending physician to document whether inpatient admission is clinically warranted — while he is still in the hospital. If he is on a Medicare Advantage plan, the three-day rule may be waived, but prior authorization will apply instead.

The rehab facility in Silver Spring says my mother has plateaued and Medicare is ending. Can I challenge that?

Yes, and you should do it immediately. First, plateauing is not a lawful basis for termination on its own: under the Jimmo v. Sebelius settlement, Medicare covers skilled care that maintains a condition or slows decline, not only care that produces improvement. Second, the facility must hand you a Notice of Medicare Non-Coverage at least two calendar days before the last covered day, and that notice carries the phone number for the Beneficiary and Family Centered Care Quality Improvement Organization. Call by noon of the day before coverage ends to request an expedited review. Your mother stays put, Medicare keeps paying during the review, and decisions typically arrive within 72 hours. If the appeal fails, ask for a demand bill so Medicare rather than the facility decides. Maryland's Office of Health Care Quality and the local long-term care ombudsman are both worth looping in.

What happens financially when the 100 days run out and my parent still cannot go home?

The stay becomes custodial care, which Medicare never covers, and the rate changes the same week. DC-metro nursing home care runs roughly $10,000 to $14,000 a month, assisted living $5,500 to $8,500, memory care $7,500 to $11,000, and in-home agency care $30 to $40 an hour, with Bethesda, Chevy Chase, McLean and upper Northwest DC at the top of those ranges. Long-term care Medicaid is the usual answer, and it is jurisdiction-specific: the Department of Health Care Finance and the EPD Waiver in the District, Maryland Medical Assistance with the Community Options Waiver and Community First Choice in Montgomery and Prince George's counties, and Virginia Medicaid through DMAS under Cardinal Care in Arlington, Alexandria and Fairfax, where the Auxiliary Grant also helps with assisted living. Applications take weeks, so start them during the rehab stay rather than after it.