How to Fix an Unauthorized ACA Plan Switch in 2026: Spot the Signs, Restore Coverage, and Recover From a Rogue Broker

You go to refill a prescription you've taken for years and the pharmacist says it's no longer covered. Or your primary care office calls to say your insurance shows you out-of-network. Or a welcome packet arrives from a carrier you've never heard of. None of these look like fraud at first — they look like a billing error. They're not. In the first six months of 2024 alone, more than 200,000 ACA Marketplace consumers reported to CMS that they had been enrolled in or switched between plans without their permission, and complaints have continued through 2025 and into 2026.

The fix is straightforward — once you know what you're looking at. CMS now resolves unauthorized plan-switch cases in about a week on average, and the new 2026 Marketplace Integrity and Affordability rule finally gives the agency teeth: mandatory audio-recorded consent, model consent forms, three-way calls for unfamiliar brokers, and the power to immediately suspend a broker's Marketplace access. The piece most people get wrong isn't the rescue call — it's the 1095-A and tax cleanup after.

Here's the 2026 playbook: the warning signs that get missed, the exact calls to make in order, the documents that move your case faster, the tax fallout, and how to harden your account so it doesn't happen again.

"Unauthorized agent or broker activity" — UABA in CMS-speak — covers two related scams. In an unauthorized enrollment, a rogue agent uses your name, date of birth, and ZIP code to sign you up for a Marketplace plan you never asked for, then collects monthly commissions. In an unauthorized plan switch, you already have a Marketplace plan, and a broker moves you to a different one (usually one with a $0 premium for low-income enrollees, where commissions are highest). Either way, the broker doesn't need your password — they only need to be "associated" with your application, which historically was easy to do without your knowledge.

Most victims don't find out until coverage breaks. Common discovery moments:

• A pharmacy says your medication isn't covered or now has a $200 copay instead of $10.
• A doctor's office calls to say they're not in your network — even though they were last month.
• You get a 1095-A in January for a plan you don't recognize, or two 1095-As when you only had one plan.
• An eligibility notice from HealthCare.gov shows up in your inbox outside Open Enrollment.
• You see a different premium drawn from your bank, or your auto-pay suddenly fails because the policy number changed.
• A claim comes back denied with the reason "no coverage on date of service."

You can confirm in five minutes. Log into HealthCare.gov, open My Plans & Programs, and look at the active policy. If the carrier, plan name, premium, or member ID don't match what you chose, you have a UABA case. While you're there, check the Application Details section for any agent or broker name you don't recognize — that's the person who switched you.

The 2021-2025 enhanced premium tax credits created a large pool of $0-premium enrollees. For brokers paid on a per-member-per-month basis, those enrollees were free commissions: no premium friction with the consumer, no chargebacks. Bad actors paired stolen or list-bought identity data with Enhanced Direct Enrollment platforms to enroll people in bulk. CMS's 2024 mid-year actions — the requirement that unassociated agents do three-way calls or have the consumer self-submit — slowed but didn't stop the wave.

The 2026 final rule moves the goalposts in three important ways. First, the model CMS consumer consent form is now mandatory, not optional — and for phone enrollments it must be backed by an audio recording using a CMS-provided script. Second, CMS has standing authority to immediately suspend an agent's Marketplace access if their activity poses an "unacceptable risk" to eligibility accuracy or operations. Third, the enhanced subsidies expired December 31, 2025, which both reduces the pool of $0-premium plans (the highest-commission targets) and makes the consumer's pain point louder — a switched plan now usually means a real change in what they pay.

Order matters here. The Marketplace freezes further changes once a UABA case is opened, so making that call first protects you from a second switch while you're sorting out the first.

1. Call the Marketplace Call Center

The number is 1-800-318-2596 (TTY 1-855-889-4325), 24/7. Tell the representative you want to report "unauthorized agent or broker activity" and ask them to open a casework ticket. Have ready: your Social Security number, the carrier and member ID of the plan that suddenly appeared, and your original plan's carrier and member ID if you have it. Ask explicitly for the case number and the casework email address — you'll need both.

2. Notify both carriers in writing

Send a one-paragraph email to member services at the carrier you were moved to, stating the policy was opened without your consent and that you have an open Marketplace UABA case (cite the case number). Send a similar email to your original carrier letting them know you expect to be reinstated retroactive to the switch date. Email — not phone — because you want a timestamp and a paper trail.

3. Report the broker

File a complaint with the HHS Office of Inspector General at oig.hhs.gov/fraud or 1-800-447-8477. Include the broker's name and National Producer Number (NPN) if you have them. Also file with your state's Department of Insurance — state regulators have license authority that federal agencies don't, and they move faster on suspensions.

4. Document everything in one folder

Create a folder (digital is fine) with: every eligibility notice and 1095-A in your HealthCare.gov account, screenshots of the unfamiliar plan, bank statements showing the changed premium, EOBs and pharmacy receipts from the affected months, the original broker emails or text messages, and a one-page timeline of when you noticed each thing. Most cases resolve without you needing to send this folder — but the cases that drag out are the ones where consumers can't find their original 1095-A six months later.

5. Lock down the account

While you're logged in, change your HealthCare.gov password, turn on two-factor authentication, and remove any associated agent or broker from your application. From the dashboard, go to My Profile → Account Settings to remove broker associations. This single step prevents a re-switch within hours of fixing the first one.

Per CMS's 2025 operational reporting, unauthorized plan-switch cases now resolve in about 7 days on average from receipt, and unauthorized-enrollment cases in about 5 days. The actual sequence:

• Day 1-2: Marketplace casework reviews the application history, identifies the broker, and pulls any consent documentation (or finds the absence of it).
• Day 3-5: The Marketplace administratively reverses the change. Your original plan is reinstated retroactive to the switch date. The bogus plan is terminated retroactive to its start.
• Day 5-7: Both carriers receive updated 834 enrollment files. The wrong-plan carrier voids any claims it paid; your original carrier reprocesses claims from the affected months.
• Within 30 days: A corrected 1095-A is generated showing only the months you were on your original plan. The bogus plan's 1095-A is voided or zeroed out.

If you paid out-of-pocket for care during the affected months because providers were out-of-network on the wrong plan, you have timely filing protection. Most carriers extend the claim filing deadline for UABA-affected months — but you need to submit those claims to your reinstated carrier with a brief cover letter and the EOB from the wrong carrier showing the original date of service. Pharmacy overcharges usually require a separate refund request through the pharmacy benefits manager (PBM) listed on your original plan card.

This is the step most articles skip and most consumers don't realize matters. The premium tax credit you reconcile on Form 8962 is calculated using the benchmark plan and APTC amounts shown on your 1095-A. If you have two 1095-As for the same months (one from the legitimate plan, one from the bogus plan), the IRS expects you to reconcile both — and the bogus 1095-A almost always has a different second-lowest-cost Silver benchmark, which means a different premium tax credit calculation.

With the APTC repayment cap gone in 2026, the consequences are real. A wrong 1095-A could show you receiving thousands more in subsidy than you actually got, triggering a repayment when you file. Two things to do:

• Don't file until you have a corrected 1095-A. If April 15 is approaching and the Marketplace hasn't reissued, file an extension on Form 4868 — that protects you from late-filing penalties without forcing you to file with wrong numbers.
• Run your reconciliation both ways. Once you have the corrected 1095-A, calculate Form 8962 using both forms (separately) and confirm the numbers match what you actually paid. The HealthCalc ACA Subsidy Calculator can give you a fast sanity check on what your true premium tax credit should be at your income.

You were enrolled, period — you never had an ACA plan before

This is the cleanest case to resolve. Tell the Marketplace you have no record of ever applying. They'll void the application from the start date, the carrier will refund any premiums, and there's no 1095-A to reconcile because the policy is treated as never existing. You may still want to file an identity-theft affidavit with the IRS (Form 14039) and place a fraud alert with one of the credit bureaus — the data used to enroll you came from somewhere, and that "somewhere" may also be used for other identity-theft attempts.

You were switched within the same insurer

Easier than a cross-carrier switch — the insurer can usually reinstate the original plan without claims rework, and your network typically didn't change. Make sure to confirm the cost-sharing reduction (CSR) tier hasn't shifted: an unauthorized switch from a Silver CSR plan to a Bronze plan looks small on paper but dramatically raises your deductible and out-of-pocket max.

You were switched across carriers and used the new plan

The most paperwork-heavy case. The Marketplace reverses the enrollment, your old carrier reinstates, and claims paid by the new carrier are recouped — but in practice, the new carrier negotiates with the old one to transfer the claims to the right policy. From your side, the important thing is to not let any provider send you a bill while this is sorting out. If a provider calls about an unpaid balance, send them the UABA case number and tell them to hold the bill pending resolution. Most will.

Five habits cover most of the vulnerability:

• Use one trusted broker — or none. If a broker handled your enrollment last year and you were happy, use the same one. Get their NPN and write it down. If you didn't use a broker, don't add one — go straight through HealthCare.gov or your state's exchange.
• Two-factor authentication. Turn on 2FA on HealthCare.gov. The setup is in My Profile → Account Settings. This single step blocks most account takeovers.
• Treat unsolicited outreach as suspicious by default. Legitimate ACA assistance is not advertised by cold call, text message, or social-media DM. CMS and HealthCare.gov never reach out to you unprompted to "increase your subsidy" or "give you free benefits." If someone offers either, it's a scam.
• Set up insurer email alerts. Most carriers offer notifications for any change in member status. Turn them on. If your status changes without you logging in, you get an email the same day.
• Quarterly account check. Log into HealthCare.gov four times a year, even if nothing has changed. Confirm the active plan, the broker association, and the projected income on file. This is the fastest way to catch a switch before claims get tangled up.

Once the case is resolved, three quick checks confirm everything is back where it should be:

• Plug your correct household income into our ACA Subsidy Calculator and compare the estimated APTC to what's on your corrected 1095-A.
• Use the Plan Cost Calculator to project total annual costs (premium + likely usage) on your reinstated plan and confirm it's the same one you originally chose.
• If your prescription costs shifted during the affected months, the Drug Cost Finder can show what those drugs should have cost on your original plan — useful for any pharmacy refund request you submit.
• For HSA-eligible Bronze or Silver plans, our HSA vs FSA Calculator can help confirm the contribution limits attached to the right plan tier.

Unauthorized ACA plan switches are real, they're still happening in 2026, and most consumers don't notice until a pharmacy or doctor's office surfaces the problem weeks later. The good news: the new audio-consent rule, immediate broker suspensions, and CMS's faster casework process all make 2026 the year where these cases actually resolve quickly. The Marketplace will reinstate your original plan retroactive to the switch date in about a week if you make the first call promptly and document the rest.

Five-minute action list: log into HealthCare.gov, confirm the active plan matches what you chose, turn on two-factor authentication, save your original 1095-A somewhere you can find it next April, and if anything looks off, call 1-800-318-2596 the same day. The case opens faster than the broker can switch you a second time.