Medicaid applicants in South Dakota, North Carolina, Michigan and Wisconsin have until Dec. 31 to file under the old rule that lets the program pay for medical bills from before the application date. After that, the look-back shrinks to as little as one month. Anyone with an unpaid hospital, nursing home or doctor bill from this fall is on a short clock.

The change comes from the 2025 federal law known as H.R. 1, and each state is writing it into its own program. The details differ by state and by who is applying, but the date is the same everywhere: Jan. 1, 2027.

What past-bill coverage means

Medicaid normally starts paying from the month a person applies. Retroactive coverage reaches back before that month. If the applicant met every Medicaid rule during those earlier months, the program pays approved bills from them, even though the application came later.

That matters most to families who wait. A parent lands in the hospital, then moves to a nursing home, and the paperwork gets pushed aside while relatives sort out the finances. Under current rules in these four states, a late application can still pull those earlier bills back into coverage. After Jan. 1, much less of that history will count.

Who has to decide before January

The families most affected are those caring for an older parent or spouse who may need nursing home or home care and has not yet applied. Anyone in North Carolina, South Dakota, Michigan or Wisconsin who is sitting on a recent medical bill and might qualify for Medicaid has to decide whether to file by Dec. 31, because the three-month look-back disappears on Jan. 1. The state Medicaid office makes the eligibility call, not the family, so an application is the only way to find out.

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Where each state stands

North Carolina’s Medicaid site is the clearest on the deadline. It says anyone who applies by Dec. 31, 2026 can have approved costs covered for up to three months before the application. Starting Jan. 1, adults 19 through 64 who do not have a disability get up to one month. Children, adults 65 and older, and people with a disability get up to two months.

South Dakota’s Department of Social Services lists the same three-month window today and cuts it from Jan. 1, 2027. Adults covered under Medicaid expansion drop to one month. Adults and children in every other coverage group drop to two months. The department says the change reaches all Medicaid and children’s health insurance applicants.

In Michigan, Bridge Michigan reported in July that applicants can now get about 90 days of retroactive coverage. The same report says the Healthy Michigan Plan, the state’s expansion program, goes back only 30 days once the new rules start on Jan. 1, 2027. The report does not say how the limit will apply to Michigan’s other Medicaid programs.

Wisconsin’s Department of Health Services says members will be able to receive retroactive coverage for two months instead of three beginning Jan. 1, 2027. The page notes the state is still waiting on federal guidance and does not break the change out by group.

How the dates play out

The cutoff is the application date, not the date of the care. A bill from early October still falls inside the three-month window for an application filed by Dec. 31. The same application filed in the first week of January would reach back only one or two months, depending on the state and the applicant, and an October bill would drop out.

The new limits also differ by group. In North Carolina and South Dakota, the shortest window falls on working-age adults. In North Carolina that means adults 19 through 64 without a disability, and in South Dakota it means expansion adults. Older adults, children and people with disabilities keep two months in North Carolina. A family applying for a parent in a nursing home is therefore looking at two months in those two states if the application slips into January, versus three if it is filed in December.

Retroactive coverage is not automatic. The applicant must have met Medicaid’s income and other rules during each month being covered, and the state decides which bills are approved costs. Filing early does not guarantee that every bill is paid. It keeps the longest possible look-back available while the state checks.

South Dakota applicants use the BEES customer portal at eaportal.sd.gov, and the Department of Social Services lists 605-773-3165 for questions. North Carolina, Michigan and Wisconsin each run their own application routes through their state Medicaid or health departments, and each state’s page carries the sign-up details.

Nursing home care is where the stakes run highest. A single month in a facility can cost thousands of dollars, and Medicaid’s retroactive coverage can turn an unpaid bill into a covered one. Families weighing a January filing in place of a December one are weighing exactly that money against whatever reason made them wait.

A Medicaid application for long-term care also opens a financial review. Caseworkers look at assets and at transfers made in the past, so families who plan to apply for a parent usually want to understand those rules before the application goes in, not after.

Applying for a parent’s Medicaid before January?

The risk is waiting past Dec. 31 and watching a three-month look-back shrink to one or two, or filing in a rush without knowing how Medicaid treats money a family has already moved. Both mistakes are hard to undo once the application is in.

Protect Your Savings From Care Costs is a 10-page guide that covers Medicaid’s 5-year look-back before you give anything away, plus how the at-home spouse is protected, with the 2026 numbers. It also includes a care-plan worksheet to fill in with your family.

Get the look-back guide and care-plan worksheet before the January Medicaid cut →

This article was produced with AI assistance and edited for accuracy against the sources linked above.