Deadline warning: An Eligibility Notice that mentions a data matching issue has a deadline. The Marketplace generally gives about 90 days from the notice date to send documents for income issues and about 95 days for citizenship or immigration issues. The exact date is printed on your notice, so use that date, not an estimate.
You enroll in a marketplace policy in January, selecting an affordable Silver plan supported by a $450 monthly Advance Premium Tax Credit (APTC). Two months into your coverage, you log into your portal or check your mailbox to find a stern document labeled “Eligibility Notice: Action Needed.”
The marketplace alerts you to a Data Matching Issue (DMI)—previously termed an “inconsistency.” The notice demands documentary proof for numbers you thought were settled during enrollment: your projected annual household income, your citizenship status, or your employer’s health benefit terms.
Most consumers make the mistake of setting the letter aside, assuming the exchange will resolve it automatically or that their monthly premium payments protect their policy. That assumption is risky. If the deadline passes without acceptable documents, the Marketplace can reduce or end your premium tax credit, or in citizenship and immigration cases end the enrollment itself. In this hypothetical, a $40 monthly premium would rise to the full $490 price, and if the higher bill goes unpaid the insurer can eventually cancel the policy.
Why Data Matching Issues Occur: The Federal Data Services Hub
When you submit an application on HealthCare.gov or a state-based exchange, your data does not sit in a silo. The exchange routes your inputs through the Federal Data Services Hub (FDSH) to run instantaneous cross-checks across multiple federal agencies:
- The IRS: Compares your projected Modified Adjusted Gross Income (MAGI) against your most recent federal income tax returns (often 1 to 2 tax years prior).
- The Social Security Administration (SSA): Validates name, date of birth, citizenship, and Social Security Number combinations.
- The Department of Homeland Security (SAVE): Verifies alien registration numbers, naturalization numbers, and lawful presence expiration dates.
- Equifax / Experian Workforce Solutions: Cross-checks real-time quarterly wage data reported by commercial employers.
A DMI is created when the information on your application cannot be confirmed, or differs from those data sources by more than the threshold the Marketplace uses that year. If you changed jobs, transitioned to freelance work, had hours cut, or separated from a spouse, the federal computers flag your application as an unverified discrepancy.
The DMI Resolution Matrix: Accepted Documentation by Inconsistency Type
Sending documents that do not match the issue can leave it unresolved. HealthCare.gov publishes the full list of accepted documents for each type of issue; the table below gives common examples, but follow the list in your own notice:
| Inconsistency Type | Federal Verification Window | Acceptable Evidentiary Proof | Outcome If Unresolved |
|---|---|---|---|
| Annual Household Income | 90 calendar days from notice date. | Recent paystubs (past 30 days), Schedule C from prior return, or signed employer profit/wage letter. | APTC eliminated or recalculated based on old IRS tax records; monthly bills surge. |
| Citizenship / Identity | 95 calendar days from notice date. | U.S. Passport, Certificate of Naturalization, or State Real ID + Official Birth Certificate. | Total termination of enrollment; member dropped completely from coverage. |
| Immigration Status | 95 calendar days from notice date. | Unexpired Permanent Resident Card (I-551), Employment Authorization (I-766), or I-94 record. | Total termination of enrollment for non-citizen family members. |
| Access to Employer Coverage | 90 calendar days from notice date. | Completed Appendix A (Employer Coverage Tool) signed by HR indicating cost exceeds affordability caps. | APTC revoked; employee classified as eligible for affordable group coverage. |
The Step-by-Step Playbook to Clear a DMI Fast
To ensure your documents pass manual review and permanently clear your marketplace file, execute this 4-step sequence:
Step 1: Check the Exact Wording of the Eligibility Notice
Log in to your account, open your Message Center, and review the PDF of your Eligibility Determination Notice. Locate the section labeled “What you need to do next.” It identifies the exact household member flagged and the specific category under dispute.
Step 2: Prepare a Written Attestation Letter for Income Shifts
If you are self-employed or experienced an income reduction, standard pay stubs do not exist. Draft a clear, signed Income Attestation Statement that provides context to the reviewer:
“My projected income for 2026 is lower than my 2024 IRS tax transcript because I left full-time employment in March 2026 to launch a freelance business. Attached please find my quarterly profit-and-loss statements, client invoices for the past 60 days, and bank records substantiating net monthly earnings of $2,800 ($33,600 annualized).”
Step 3: Upload Through Your Account When You Can
You can mail copies to the address on your notice, but uploading is usually faster and gives you an immediate record. To upload:
- Scan documents in clean, high-resolution PDF format (ensure all four corners and official seals are visible).
- Navigate to Application Details → Upload Documents.
- Select the matching DMI category from the drop-down menu and upload the files.
- Save the confirmation receipt number generated by the portal.
Step 4: Ask About More Time If the Deadline Is Close
If your deadline is approaching and you are still waiting on a document (for example, a birth certificate or a letter from an employer), call the Marketplace Call Center before the deadline, explain what you have requested and when, and ask whether an extension is available. The Marketplace has some flexibility to give more time when a person is making a good-faith effort, but it is not automatic, so note the date, the representative’s name, and what you were told.
After You Upload: How to Confirm the Issue Is Cleared
- Watch your Marketplace messages and mail. You should receive a notice saying the issue is resolved or that more documents are needed.
- Check your application status in your account every week or two until the issue no longer appears.
- Call if you hear nothing after a few weeks, and ask whether your documents were received and matched to the right person and issue.
- Look at your next premium bill. A sudden jump can mean your tax credit was changed.
If Your Tax Credit or Coverage Already Ended
Act quickly. Submit the documents anyway and call the Marketplace to ask what can be restored and from what date. If you disagree with the decision, you generally have the right to appeal an eligibility determination within the timeframe stated in your notice; see how to appeal a Marketplace subsidy determination. If you lose coverage, ask whether you qualify for a Special Enrollment Period, and keep paying the premium you are billed if you can while the issue is sorted out, since a lapse for non-payment is harder to undo.
A Hypothetical Example
This example is hypothetical. A rideshare driver estimates $30,000 of income on his application. His last tax return showed $52,000 from a job he has since left, so the Marketplace asks him to verify income. He uploads a short signed statement explaining the job change, a profit-and-loss summary for the current year, and recent platform earnings statements. Three weeks later he gets a notice that the issue is resolved and his tax credit continues. Had he ignored the letter, his credit could have been recalculated using the older, higher income.
Common Mistakes
- Uploading under the wrong person or category. Match each document to the household member and issue named in the notice.
- Sending unreadable photos. Make sure names, dates, and amounts are legible and nothing is cut off.
- Sending documents that do not show the current year’s income. An old return explains the past; the Marketplace wants support for this year’s estimate.
- Assuming one issue means all are cleared. A household can have more than one data matching issue.
- Not updating income later. If your income changes again, report it so you are not surprised at tax time. See what happens if you underestimate income.
Frequently Asked Questions
Does a data matching issue mean I did something wrong?
No. It means the Marketplace could not automatically confirm something on your application. It is common after job changes, name changes, or recent immigration status updates.
Do I still have coverage while the issue is open?
Generally yes. You usually keep your plan and financial help during the period you are given to send documents, as long as you pay your premiums.
Where can I get free help?
Marketplace Navigators and certified application counselors help at no cost, and licensed agents or brokers can also assist. Use the “Find Local Help” tool on HealthCare.gov. Our comparison of Navigators and brokers explains the difference.
Is the process the same in every state?
No. States that run their own marketplaces have their own portals, notices, and document lists. Follow the instructions from your state’s marketplace.
Will I get another notice before anything is cut off?
The Marketplace typically sends reminders, but do not rely on them. Use the deadline in the first notice.
The Bottom Line
A Data Matching Issue on HealthCare.gov is not an accusation of fraud—it is an automated reconciliation discrepancy between your current reality and federal historical records. Ignoring the notice, though, can cost you your financial help or your coverage. Identify exactly what was flagged, send the documents your notice lists before the deadline, keep proof of what you sent, and follow up until you see it resolved.