Tomorrow, July 31, 2026, the interim final rule that CMS issued on June 1 to implement the Medicaid work requirements in Public Law 119-21 takes effect, and the comment period on it closes the same day. If you run a practice with a meaningful Medicaid population, this is the date the abstract policy debate of the last year turns into letters arriving at your patients' homes. States are required to complete their first round of outreach to affected enrollees between June 30 and August 31. Several states have already begun enforcing: Nebraska started on May 1, 2026, and Montana and Arkansas began on July 1. Iowa is scheduled for December 1. Every other expansion state must be running the requirement by January 1, 2027 unless it receives a good-faith extension, which the law allows through the end of 2028.
We are not going to argue the policy here. We are going to describe what changes for the people at your front desk and in your billing office, because in our experience the practices that lose the most money during eligibility changes are the ones that treat them as somebody else's problem until the denials arrive.
Key takeaways
- The rule takes effect July 31, 2026; states must implement by January 1, 2027, and several already have. Six-month renewals for expansion adults begin with renewals due on or after December 31, 2026.
- CMS itself projects about 2.3 million fewer Medicaid enrollees in fiscal 2027 and over 3 million a year after that, and it attributes a meaningful share of the losses to paperwork rather than actual non-compliance. Paperwork losses are the ones a practice can influence.
- Eligibility verification moves to the day before every visit. Address confirmation moves into the check-in script.
- Patients will ask your providers for letters documenting a qualifying condition. Decide now who writes them and how fast.
The timeline, in one table
| Date | What happens |
|---|---|
| June 1, 2026 | CMS issues the interim final rule (CMS-2454-IFC); published in the Federal Register June 3 |
| June 30 to August 31, 2026 | Window in which states must conduct initial outreach to enrollees about the requirement, by mail plus at least one other channel, with follow-up to people who enroll later |
| July 31, 2026 | Rule takes effect; comment period closes |
| December 31, 2026 | Six-month eligibility redeterminations begin applying to expansion adults at renewals due on or after this date |
| January 1, 2027 | Work requirements must be in place in every expansion state without an extension; retroactive coverage for expansion adults shortens |
| Through 2027 | States may accept self-attestation for some exemptions, including medical frailty, where they lack data to verify; documentation is required after the next renewal and by 2028 |
| Through December 31, 2028 | Good-faith extensions available to states that cannot implement on time |
Who is affected
Adults aged 19 to 64 enrolled through the ACA expansion group, or through certain 1115 waiver programs that provide comparable coverage. They must show at least 80 hours a month of work, community service, a work program or education (at least half-time), or monthly income of at least $580 in 2026 (80 hours at the federal minimum wage), or qualify for an exemption. States check compliance for one to three months before an application and at each renewal, and may check more often. An enrollee found non-compliant gets a notice and 30 calendar days to demonstrate compliance or an exemption before disenrollment.
The exemptions matter for your patient population: pregnant and postpartum individuals, people who are disabled or medically frail (a category that includes serious mental illness, substance use disorder and disabling physical conditions), parents and caretakers of children under 14 or of a disabled dependent, American Indians and Alaska Natives, former foster youth, veterans with a total disability rating, people already meeting SNAP or TANF work rules, people in drug or alcohol treatment, and people who are incarcerated. Whether a patient is exempt is the state's determination, not yours. But a physician's documentation of a qualifying condition is often what the patient needs to get the exemption, and that is where practices come in.
The scale
CMS's own regulatory impact analysis projects about 2.3 million fewer Medicaid enrollees in fiscal year 2027, rising to over 3 million a year thereafter. It estimates a 15 percent disenrollment rate among people subject to the requirement: about 9 percent for not meeting it and about 6 percent for administrative and paperwork reasons. A RAND study published February 26, 2026 projected 7.6 million fewer enrollees by 2034 across all provisions of the law, with about 5.3 million attributed to work requirements. The Congressional Budget Office estimated that the six-month redetermination requirement alone would add about 700,000 to the uninsured in 2034, and that roughly 70 percent of those people would lose coverage for procedural reasons rather than ineligibility. Whatever you think of the projections, the direction is not in doubt, and the procedural losses are the ones a practice can influence.
What changes at the front desk
- Eligibility verification at every visit. Annual or quarterly checks assumed twelve months of stable coverage. From the end of this year, expansion adults renew every six months and can be disenrolled between renewals for non-compliance. Run a 270/271 the day before every visit and read the result, not just the flag.
- Address and phone updates. The single biggest cause of procedural disenrollment during the 2023 to 2024 unwinding was mail that never arrived. Ask every Medicaid patient to confirm their mailing address with the state and with you. Put it in the check-in script: "Has the state got your current address? Their letters about this are going out now."
- A one-page handout per state. What the requirement is, who is exempt, where to report hours, the state's phone number, and the Marketplace as an option for people who lose eligibility. Have it reviewed by counsel or your state primary care association; it is information, not advice.
- Exemption documentation requests. Expect patients to ask for letters confirming a medically frail condition or a pregnancy. Decide now who writes them, what template is used and how quickly. This is clinical documentation, so it belongs with the provider, but the workflow belongs with the practice manager. A 48-hour turnaround is reasonable; a three-week turnaround costs the patient coverage.
- Self-pay and sliding fee conversations. When a patient shows inactive, the conversation at check-in should include what today costs, whether a payment plan is available, and how to reapply or enroll elsewhere. Decide your policy before December, not in the exam room in January.
A worked example
A community-based primary care practice sees 9,000 Medicaid visits a year, about 60 percent of them expansion adults, so roughly 5,400 visits. Apply CMS's 15 percent disenrollment estimate and about 810 visits a year, or 68 a month, will be for patients who have lost coverage since their last visit, many without knowing it. At a Medicaid allowed amount of about $95, that is roughly $6,500 a month of visits that will deny CO-27 if nobody checks the day before. The practice that checks turns most of those into a conversation at check-in: reapply, use the sliding fee, or call the Marketplace. The practice that does not check discovers them in a denial report six weeks later and sends statements that mostly go unpaid. Same patients, same visits, very different year-end.
What changes in billing
Retroactive eligibility for expansion adults shrinks from three months to one or two months for applications from January 1, 2027, so the old habit of holding a Medicaid claim for ninety days in case coverage comes through retroactively will work less often. Watch CO-27 and CO-31 denials by month; a rising count is your early warning. Set up a work queue for "Medicaid inactive at date of service" and review it weekly, because some of those patients will regain coverage and the claim can be resubmitted, and others need a statement or a financial assistance determination promptly rather than in six months. Managed care plans will also churn: a patient who loses and regains coverage may come back on a different MCO, so the day-before check needs to capture the plan, not only the state program.
Questions we hear
We are in a non-expansion state. Does any of this apply?
The work requirement applies to the expansion population, so its direct effect on you is small. The six-month redetermination provision is also aimed at expansion adults. Your Medicaid patients still face standard renewals, other provisions of the law touch eligibility verification generally, and the address-update advice still applies.
Should we help patients report their hours?
Practices are not enrollment agencies and should be careful about taking on that role. Pointing patients to the state portal, to a navigator or to a community organization is appropriate. Community health centers and PCMH-recognized practices often have care coordination staff who already do this; our PCMH transformation team helps practices build it into the care management workflow.
Where can we get help with the eligibility workflow?
Day-before verification, the inactive-coverage queue and the front-desk script are part of what our medical billing service sets up for practices with a Medicaid population. Whatever you decide, decide before December.
What to do this month
- Pull your Medicaid visit volume and estimate the expansion adult share. Multiply by 15 percent to size the problem.
- Add the address-confirmation question to the check-in script this week, while the state letters are going out.
- Find out your state's implementation date and whether it has applied for an extension; your state primary care association will know.
- Draft the exemption documentation template and agree the turnaround with your providers.
- Confirm your eligibility vendor returns plan-level detail and set the day-before check as the default for every Medicaid appointment.
