# Will My Medicare Patients Lose Coverage Over Citizenship Status in 2027?

> CMS says Medicare eligibility narrows by citizenship status, with terminations starting in 2027. Here's how practices can protect revenue now.

Source: https://webillhealth.com/will-my-medicare-patients-lose-coverage-citizenship-status-2027/  
Publisher: WeBill Health  
Last updated: November 12, 2026

CMS confirmed in the MLN Connects Newsletter for November 12, 2026 that Medicare eligibility will narrow to U.S. citizens and nationals, lawful permanent residents, Cuban and Haitian entrants, and COFA migrants under the Working Families Tax Cut legislation, with coverage terminations beginning no earlier than February 1, 2027.

## What exactly changed, and who is affected?

Medicare will only cover beneficiaries who are U.S. citizens or nationals, lawful permanent residents, Cuban and Haitian entrants, or COFA migrants, and who still meet every other eligibility rule such as age or disability status. The Social Security Administration will mail notices directly to patients whose immigration category no longer qualifies. Refugees and asylees who do not fall into one of those protected categories are among the people this change reaches, and CMS says those patients also will not qualify for Marketplace plan assistance once their Medicare eligibility ends, since the same immigration status test applies there too.

## When will coverage actually end?

CMS states terminations will happen no earlier than February 1, 2027, which gives practices a short window to identify which patients on the schedule could be affected before claims for January and February dates of service go out the door. Medicare Advantage organizations carry a separate duty to tell their network providers when an enrollee’s eligibility changes, so a practice working mainly with Medicare Advantage patients should confirm with each plan how that notice will reach the office.

## How can my practice check a patient’s eligibility before an appointment?

CMS points providers to the HIPAA Eligibility Transaction System, known as HETS, which returns up to four years of eligibility history including Part A, Part B, and Part D entitlement, Medicare Advantage plan details, and Medicare Secondary Payer status. Practices can query HETS directly, through their Medicare Administrative Contractor’s online portal, or through a clearinghouse or practice management system that already pulls HETS data on the practice’s behalf. CMS’s own guidance tells billing staff to use that eligibility response to prepare accurate claims, not to bill first and sort out eligibility questions later.

## What happens if I provide care to a patient who turns out to be ineligible?

A claim for a patient who has already lost Medicare eligibility gets paid in error, and an error like that is a candidate for recoupment once it surfaces, often months after the visit. CMS notes that a patient who loses Medicare over immigration status is not automatically eligible for Marketplace subsidies either, so a practice cannot assume the balance will simply shift to a different payer. Catching the change at check in protects the claim and the patient alike, since staff can point that patient toward employer coverage, a spouse’s plan, state social services, a community health center, or HealthCare.gov well before an appointment turns into care nobody ends up paying for.

## What this means for practices with 1 to 15 providers

A small Medicare caseload does not come with a compliance department to catch an eligibility change before it turns into a denied claim, so the check has to happen at the front counter. A few concrete steps for the next several months:

1. Run a HETS or clearinghouse eligibility check within 48 hours of every Medicare appointment between now and February 2027, not only at the start of the year.
2. Flag any patient record coded as a refugee, asylee, parolee, or other non permanent immigration category for a manual eligibility recheck before each visit, since a Social Security notice can arrive weeks ahead of any system update.
3. Train front desk staff to ask whether a patient has received a termination notice from Social Security, and to document the answer in the chart.
4. Build a short list of community health center and state social services referrals now, so staff have somewhere to send a patient who loses coverage partway through a course of treatment.

## Frequently asked questions

**Does this affect Medicare Advantage patients the same way?** Yes. The citizenship and immigration eligibility rule applies to Original Medicare and Medicare Advantage alike, but CMS places the job of notifying providers about an enrollee’s change in status on the Medicare Advantage organization, not on HETS.

**Will CMS take back money already paid for a patient who later loses eligibility?** CMS has not announced recoupment of claims paid before a patient’s termination date. The exposure described in this guidance looks ahead, tied to dates of service on or after a patient’s coverage actually ends.

**Do green card holders need to worry about this?** No. Lawful permanent residents, along with U.S. citizens and nationals, Cuban and Haitian entrants, and COFA migrants, remain eligible as long as they meet Medicare’s other standard requirements.

**What if a patient cannot get an appointment with Social Security before their next visit?** HETS reflects whatever eligibility status CMS already has on file, so a practice should rely on that system response and not wait for the patient to resolve the matter with Social Security directly.

A quick eligibility check at the front desk costs a minute. A denied claim costs a lot more to unwind. If a gap like this one could be slipping through intake, WeBill Health’s [Revenue Defense Audit](https://webillhealth.com/revenue-defense-audit/) can show you where.

## Sources

* [CMS, MLN Connects Newsletter for November 12, 2026](https://www.cms.gov/training-education/medicare-learning-network/newsletter/mln-connects-newsletter-november-12-2026)
* [CMS, Checking Medicare Eligibility (MLN8816413)](https://www.cms.gov/files/document/mln8816413-checking-medicare-eligibility.pdf)

WeBill Health is a specialty focused revenue cycle management partner for independent practices. Request a Revenue Defense Audit at https://webillhealth.com/form/