ACA Subsidy Verification: Green Card Holders Face Delays

The Centers for Medicare & Medicaid Services has proposed ACA subsidy verification rules that would stop premium help from flowing to marketplace enrollees until their eligibility is confirmed, including their citizenship or immigration status. For green card holders and the small group of other immigrants who still qualify for subsidies, the change means that a status record the government cannot match electronically would no longer come with a grace period of subsidized coverage, starting with 2028 plans.

The proposal, published in the Federal Register on Oct. 27, does not change who is eligible. It changes when the money arrives. That matters for immigrant households, because a status check that fails to match is a standard trigger for a document request, and today an unresolved check does not cost anyone their subsidy.

The calendar makes this pressing. Open enrollment for 2027 coverage begins Nov. 1 under a separate cutoff that already limits subsidies to green card holders, Cuban and Haitian entrants and citizens of the three Compact of Free Association nations. Comments on the new verification proposal are due Nov. 27, and the first annual verification window would open Aug. 1, 2027.

How ACA subsidy verification would work for immigrants

Today, when a marketplace cannot confirm a person’s status through DHS’s SAVE system, it opens a data matching issue and allows 95 days to submit documents such as a green card or Form I-94. Advance premium tax credits and cost-sharing reductions continue during that period.

The proposed rule would end that cushion. Marketplaces could not authorize either form of help for an applicant with an open citizenship or lawful presence issue until it is resolved and the person is found eligible. Enrollees verified later would get the help retroactively for the months they were covered, CMS says. New enrollees would see coverage and assistance start from the date their eligibility is verified, although CMS would let them pick a “contingent” plan that takes effect only once they qualify.

The proposal also adds a yearly checkpoint. Between Aug. 1 and Dec. 31, enrollees would have to provide or confirm U.S. citizenship or eligible noncitizen status, along with income, household size, residence and other coverage, before the marketplace could renew their subsidy. Anyone who skips that step would be automatically re-enrolled for the next year without financial help.

The authority comes from Section 71303 of the 2025 tax and spending law, Public Law 119-21, which amended the tax code so that, from Jan. 1, 2028, a month does not count toward the premium tax credit unless the marketplace has verified the enrollee’s eligibility. Treasury has separately proposed adding lawful presence and citizenship to the verified items in a parallel IRS rule.

Where the delays are likely to land

The people most exposed are those whose records lag behind their actual status. That would include newly approved permanent residents whose cards are still in the mail, conditional residents relying on a USCIS receipt notice that extends an expired card while a Form I-751 is pending, and Compact of Free Association migrants, whose status is not shown on a green card at all. Each can be fully eligible and still trip a data match. A current enrollee in that position would pay the full premium until the paperwork clears and then recover the credit; a new applicant would wait for coverage or assistance to begin.

The proposal’s reach goes well beyond immigrants. CMS estimates the rule would leave 332,500 fewer people enrolled on the exchanges each year and raise premiums by about 0.4 percent, Becker’s Payer Issues reported, figures also reported by the Healthcare Financial Management Association. The proposal itself estimates that about half of all marketplace applicants or enrollees could get a residency data matching issue alone.

CMS presents the change as a way to keep subsidies away from improper and fraudulent enrollments and to spare enrollees large repayments at tax time. The agency also acknowledges, according to HFMA’s review of the rule, that more people may lose coverage and that this “may impose greater burdens on the healthcare system.” Because Section 71303 is written into the tax code, the open question in the comment period is likely to be how the verification is carried out, such as the length of windows and the data sources accepted, rather than whether it happens.

Dates on the calendar

Nov. 1, 2026: Open enrollment for 2027 coverage begins under the new eligible-noncitizen limits.
Nov. 27, 2026: Comments due on the proposal (docket CMS-2026-3367).
Aug. 1, 2027: First pre-enrollment verification window for 2028 coverage would open.
Jan. 1, 2028: Section 71303’s verification requirement takes effect.

This article is for general information and is not legal advice.

Sources

Vasanth Vaidyanathan, Esq.

Administrator

Vasanth Vaidyanathan is an immigration attorney with over 20 years of experience focused exclusively on U.S. immigration and nationality law. He holds a LL.M. from California Western School of Law, San Deigo and advises individuals and businesses on employment and family-based immigration matters, including H-1B, PERM, EB categories, and adjustment of status. He has also been a featured speaker at immigration seminars across the U.S. To reach Vasanth visit: https://www.vnathan.com/

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