Starting January 1, 2027, Illinois will require most adults in its Medicaid expansion program to either document 80 hours of work in the previous month or prove they are too sick to work. The state plans to rely heavily on medical billing codes to determine who qualifies as too sick. But for many cancer patients, the codes lag behind their actual condition, creating a dangerous gap in coverage.
The federal government mandated the work requirement, but states have broad discretion in how they implement it. The most challenging part is figuring out how to identify who is truly unable to work from claims data alone. On July 30, a federal judge declined to block the rule while a multistate lawsuit proceeds, leaving states to build their systems now. Illinois' approach illustrates the high stakes of getting this wrong.
The law exempts people who are "medically frail," a category meant to protect those with serious health conditions that prevent employment. Cancer treatment often qualifies. The problem is how states identify these patients. Illinois, like most states, will use billing codes from healthcare claims. These codes work well for someone actively undergoing chemotherapy, but they fail at both ends of the cancer journey: before a diagnosis is confirmed and after treatment ends but monitoring continues.
Consider a woman who has an abnormal mammogram. She is a patient before she has a diagnosis. In the weeks between the imaging and a pathology report, she undergoes additional scans, a biopsy, and specialist visits. The cancer code only appears at the end of that process. Until then, her records show only fragments: screening, abnormal finding, follow-up. But she is not simply waiting for a code; she is waiting to learn if she has cancer.
If her Medicaid renewal falls during this window, the system sees no confirmed diagnosis and therefore no exemption. She is told to prove she is working or too sick, but the record cannot yet show that. The gap is not just a paperwork delay; it directly affects her access to care at a critical moment.
There is a second, even more troubling trap. Illinois has a separate Medicaid pathway for breast and cervical cancer treatment, but state rules explicitly bar people who are already on Medicaid from using it. So a woman already enrolled through the expansion program cannot switch to that pathway once diagnosed. She remains in the expansion group, subject to the work requirement, throughout surgery and chemotherapy. This is not a brief window of exposure; it is a standing threat for the entire course of treatment.
Arkansas already tried a similar work requirement in 2018. In the first seven months, about 18,000 people lost coverage—one in four of those subject to the rule. A study in the New England Journal of Medicine found no increase in employment; people lost coverage because they could not navigate the reporting requirements, not because they were unemployed. By early 2019, only about one in ten had regained coverage.
The federal law is settled, but implementation is not. States are already making different choices: some screen for medical frailty at application, others build hardship exemptions or set longer compliance periods. Illinois does not need to rewrite federal policy to protect cancer patients. It needs to decide where to place the burden of proof.
What would protection look like? States could shield patients from the moment they receive abnormal screening results, so they are not asked to prove illness during the weeks the record cannot yet show it. They could add a grace period when a diagnosis is documented but the claim has not caught up. They could accept letters from free or community clinics that do not bill Medicaid, ensuring the poorest patients are not invisible. They could keep survivors covered while they are still being monitored.
None of these changes would alter the federal requirement; all are within state power. The Centers for Medicare and Medicaid Services projects that 2.3 million people will lose Medicaid in the first year of these rules nationwide. No vote in Springfield will revisit the federal law, but in administrative offices over the coming months, officials will decide which diagnoses count, when exemptions begin, and how much proof patients must produce before the system believes they are sick. Cancer does not wait for a billing code to catch up, and neither should the states now deciding what counts as proof of illness.
