How to Report Medicare Fraud

Where to report Medicare fraud

Report Medicare fraud to the Office of Inspector General (OIG) at the U.S. Department of Health and Human Services. They investigate fraud involving Medicare, Medicaid, and other federal health programs. You can report online, by phone, or by mail — you do not need to be a Medicare member to report.

The fastest route is the OIG's online form at oig.hhs.gov/fraud. You can also call the OIG hotline at 1-800-HHS-TIPS (1-800-447-8477) to speak with someone directly. If you prefer to write, mail your report to the Office of Inspector General, U.S. Department of Health and Human Services, 330 Independence Avenue SW, Washington, DC 20201.

Your state's Medicaid fraud control unit also investigates fraud involving state health programs. You can find your state unit through the National Association of Medicaid Fraud Control Units website, or by calling your state's Attorney General office.

Key Takeaways

• Report Medicare fraud to the Office of Inspector General by visiting oig.hhs.gov/fraud, calling 1-800-HHS-TIPS, or mailing a written report.
• You can report anonymously, and you do not need to provide your name or contact information if you prefer not to.
• Have specific details ready: the provider's name and address, dates of service, what happened, and any documents you have (bills, receipts, explanation of benefits).
• The OIG investigates but does not always notify you of the outcome — investigations can take months or longer.
• If you suspect fraud by a specific Medicare plan or insurance company, you can also report directly to that plan's compliance department.

What information to have before you report

Gather as much detail as you can about what happened. Write down the provider's name (the doctor, hospital, clinic, or supplier), their address, and phone number. Note the dates when you received the service or when the fraudulent charge appeared on your bill.

Describe what you believe happened — for example, "I was billed for a service I never received," or "The provider charged me for a more expensive procedure than what was actually done." Include any specific amounts if you remember them. Bring copies of relevant documents: your Medicare bill, the explanation of benefits letter, receipts, or any written communication with the provider.

If you have Medicare Advantage or a supplemental insurance plan, also note the plan name. The more specific you can be, the easier it is for investigators to look into your report.

How the investigation process works

After you report, the OIG reviews your information to decide whether to investigate. They prioritize cases involving large amounts of money, patterns of fraud affecting many people, or schemes that target vulnerable seniors. A single suspicious charge may not trigger an investigation, but it becomes part of a larger pattern the OIG tracks.

If they decide to investigate, they may contact you for more details, interview the provider, and request medical records. This process is confidential — the provider is not told who reported them. Investigations typically take several months to over a year, depending on complexity.

The OIG does not always notify you of the outcome. If fraud is confirmed and the provider is prosecuted or fined, that information may become public record, but you may not hear about it directly. If you want to know the status of your report, you can contact the OIG and reference any case number they gave you.

Reporting fraud on your Medicare bill or explanation of benefits

If you spot something wrong on your Medicare bill or explanation of benefits letter, start by contacting Medicare directly at 1-800-MEDICARE (1-800-633-4227). They can clarify whether a charge is legitimate or investigate a billing error.

Medicare will also flag suspicious patterns in their own data. If they find evidence of fraud, they may contact you or the provider. You can also report directly to your Medicare Advantage plan or supplemental insurance company — they have their own fraud investigation teams and may act faster on claims within their own plans.

Keep copies of everything: your bills, explanation of benefits letters, receipts, and any written communication with providers or insurers. These documents support your report and help investigators understand what happened.

Reporting fraud by a specific Medicare plan or insurance company

If you believe your Medicare Advantage plan, supplemental insurance company, or prescription drug plan is committing fraud, you can report to that company's compliance or fraud department. Call the customer service number on your insurance card and ask to speak with the compliance officer or fraud hotline.

You can also report to your state's insurance commissioner, who oversees insurance companies operating in your state. The National Association of Insurance Commissioners website has a directory of state insurance offices. State insurance commissioners investigate complaints about unfair practices, billing errors, and fraud by insurers.

Additionally, you can report to the Centers for Medicare and Medicaid Services (CMS) at 1-800-MEDICARE. CMS oversees all Medicare plans and can investigate complaints about plan practices.

What happens if you report anonymously

You can report Medicare fraud without giving your name. The OIG accepts anonymous reports through their online form and by phone. Anonymous reports are taken seriously and investigated the same way as named reports.

The trade-off is that investigators cannot contact you for follow-up questions or to tell you what they found. If you think you might want updates or need to provide more information later, consider giving your contact details. You can ask the OIG to keep your identity confidential even if you provide your name — they will not share it with the provider or the public.

Protecting yourself while reporting

Reporting fraud does not put your Medicare coverage at risk. Medicare cannot cancel or reduce your benefits because you reported fraud. You are protected by law from retaliation.

If you are concerned about a provider's reaction, report anonymously or ask the OIG to keep your name confidential. Do not confront the provider directly or accuse them of fraud — let investigators handle it. If a provider threatens you or retaliates after you report, contact the OIG again and describe what happened.

Be cautious about sharing your report details with others. Scammers sometimes pose as investigators and call people claiming to follow up on fraud reports. Medicare and the OIG will never call you unexpectedly asking for personal information, passwords, or money.

Frequently Asked Questions

Can I report fraud if I'm not on Medicare myself?

Yes. The OIG investigates fraud involving any federal health program. If you witness fraud affecting someone else — a family member, friend, or even someone you read about — you can report it. You do not need to be directly harmed by the fraud to report it.

What if I'm not sure if something is fraud or just a billing mistake?

Report it anyway. The OIG sorts out whether something is intentional fraud or an honest error. Start by calling Medicare at 1-800-MEDICARE to ask about the charge — they can often clarify immediately. If you still think something is wrong, report to the OIG and describe what you observed.

Will reporting fraud affect my relationship with my doctor?

Reporting fraud to the OIG is confidential. Your doctor will not know you reported them unless you tell them. You are protected by law from retaliation. If you are concerned, you can report anonymously or ask the OIG to keep your identity confidential.

How long does it take to hear back after I report?

The OIG does not always send a response or update. If your report triggers an investigation, it can take months or years. If you provided your contact information, you can call the OIG and ask about your report's status using any case number they gave you.

What if the provider is still billing Medicare after I reported them?

Investigations take time, and the OIG may not stop a provider immediately. If you see ongoing fraudulent charges, report again with the new dates and amounts. You can also contact Medicare directly to dispute each charge on your bill or explanation of benefits.