In this guide 8 sections
If a bill arrives even though you have Medicare and a supplement, it does not tell the whole story. Medicare may have processed the claim while the supplement has not, or the bill may include a cost your policy does not cover. Start with the Medicare Summary Notice, then compare the supplement’s statement and the bill for the same date of service.
What it is and when it comes
Medicare’s current MSN guidance says paper notices arrive at least twice a year when you have claims. If you choose electronic MSNs, Medicare emails you for any month with a processed claim. MSNs apply to Original Medicare Part A and Part B. If you have Medicare Advantage or Part D, check your plan’s Explanation of Benefits and contact the plan about its claims.
The sections
The examples below describe a typical Part B claim. Layouts vary by claim type; Part A notices organize hospital or facility stays differently. Follow the headings and notes on your own notice.
- Summary: the period covered and an overview of your claims. Check the deductible information and whether any claims were denied.
- Claims detail: one block per provider, with each service on its own line. For each line: the date, a description of the service, the amount the provider charged, the amount Medicare approved, the amount Medicare paid, and the maximum you may be billed. A footnote links to the claim notes.
- Notes: explanations of footnotes. This is where denial reasons and other messages appear.
- Appeal information: how and by when to appeal any claim on the notice.
- Definitions and contact information.
The columns, and which one matters
Reading a typical Part B claim line on the MSN
Amount provider charged
- What it is
- The amount submitted by the provider
- What to do with it
- It is not automatically your responsibility. Compare it with Medicare’s decision and the other payment columns.
Medicare-approved amount
- What it is
- The amount Medicare approves for the service
- What to do with it
- Use it to understand the claim’s cost-sharing; deductible and coverage rules vary by service.
Amount Medicare paid
- What it is
- Medicare’s payment on that claim
- What to do with it
- Check the claim notes if the payment is $0 or differs from what you expected.
Maximum you may be billed
- What it is
- The maximum you may owe for the listed claim after Medicare’s decision
- What to do with it
- Other coverage may pay some or all of this. Compare your supplement’s statement and any payments you already made before deciding what remains.
Service approved?
- What it is
- Yes or No
- What to do with it
- “No” means denied; check the footnote for why and consider the steps in our denial guide.
| Column | What it is | What to do with it |
|---|---|---|
| Amount provider charged | The amount submitted by the provider | It is not automatically your responsibility. Compare it with Medicare’s decision and the other payment columns. |
| Medicare-approved amount | The amount Medicare approves for the service | Use it to understand the claim’s cost-sharing; deductible and coverage rules vary by service. |
| Amount Medicare paid | Medicare’s payment on that claim | Check the claim notes if the payment is $0 or differs from what you expected. |
| Maximum you may be billed | The maximum you may owe for the listed claim after Medicare’s decision | Other coverage may pay some or all of this. Compare your supplement’s statement and any payments you already made before deciding what remains. |
| Service approved? | Yes or No | “No” means denied; check the footnote for why and consider the steps in our denial guide. |
The three checks
- 1.Did every service on the notice actually happen? Look at the dates and providers. A service you do not recognise may be a billing error or fraud. Call the provider first; if it is not resolved, report to 1-800-MEDICARE.
- 2.Does the bill match the same services and dates on the MSN? Check any secondary insurance payment and amounts you already paid. If a claim is still pending, ask the billing office whether it can hold the account during review; do not simply ignore the bill or its due date.
- 3.Was anything denied? Read the claim notes and the MSN’s appeal instructions. For an Original Medicare first-level appeal, Medicare says to file within 120 days of getting the MSN. Use the deadline shown on your notice, and do not let a billing-office review use up that time.
How Medigap claims are billed: Medicare first, then the supplement
Medicare explains that most Medigap policies receive Part B claim information directly from Medicare. Some insurers also do this for Part A claims. This forwarding is often called “crossover.” It is not automatic for every insurer or every claim. The Medigap insurer then pays according to your policy; the MSN itself does not show the supplement’s final payment.
- 1.Show the provider both your Medicare card and your Medigap card so its insurance information is current.
- 2.Ask your Medigap insurer whether crossover is set up and whether it has received the claim for the specific provider and date of service. Have the MSN available when you call.
- 3.If the insurer has no claim, ask it and the provider’s billing office what is needed to submit or correct it. Keep a record of the date, the person you spoke with and the next step.
- 4.Once both insurers have processed the claim, compare their statements with the provider’s bill. Ask for an explanation of any remaining balance, including the deductible or a benefit your policy does not cover.
If you have Medicaid or help paying Medicare costs
Medicaid and Medicare Savings Programs have different eligibility and benefit rules. Do not assume that every assistance category pays all Medicare cost-sharing. One specific protection matters: people enrolled in the Qualified Medicare Beneficiary (QMB) program cannot be billed for Medicare-covered Part A and Part B deductibles, coinsurance or copayments. If you have QMB and receive such a bill, tell the provider you have QMB and contact 1-800-MEDICARE if you need help resolving it.
See it sooner
You do not have to wait for a paper notice. Check processed Original Medicare claims in your secure Medicare account, or sign up for electronic MSNs. If you are helping a parent, use Medicare’s authorization process when access to their information is needed. Keep Medicare numbers, claim documents and account passwords out of public posts.
Keep it
Keep the MSN, the supplement’s statement, the bill, payment receipts and notes from your calls together while you resolve a question or appeal. Keep copies of what you submit and record the appeal deadline. Use secure storage rather than posting documents in a public group.
Questions families ask
Is the Medicare Summary Notice a bill?
No. It is a statement of what Medicare processed, approved and paid, and the maximum a provider may bill you. Bills come from providers. Use the MSN to check whether those bills are correct.
How often does the Medicare Summary Notice come?
Medicare’s current guidance says paper MSNs arrive at least twice a year when you have claims. If you choose electronic MSNs, Medicare emails you for any month with a processed claim. You can check processed Original Medicare claims in your Medicare account before a paper notice arrives.
What does “maximum you may be billed” mean?
It is the maximum you may owe for the services listed on the MSN after Medicare’s decision. Other insurance may pay part or all of it. It is not automatically the amount you still owe: check secondary payments, payments you already made and any applicable billing protections.
Does Medicare automatically send claims to my Medigap plan?
Most Medigap policies receive Part B claim information directly from Medicare, and some insurers also receive Part A claims this way. Ask your insurer whether crossover is set up and whether it received your particular claim. Payment still depends on your policy’s benefits.
Why did I get a bill if I have Plan G?
Plan G does not cover the Part B deductible. A bill can also arrive while a secondary claim is pending, concern a service the policy does not cover, or contain an error. Compare the MSN, your supplement’s statement and the provider’s bill, then ask the insurer and billing office to explain the remaining amount.
How long do I have to appeal an Original Medicare claim?
Medicare says you have 120 days after getting your Medicare Summary Notice to file a first-level appeal. Follow the instructions and deadline on the notice. A phone call to a billing office does not replace filing your appeal.
What should I do if I see a service on the MSN that my parent did not receive?
Ask the provider’s billing office to explain the service and date; an unfamiliar description does not by itself prove fraud. If you suspect a charge for a service that was not provided, report it to 1-800-MEDICARE. Keep the MSN and notes from the billing-office conversation.
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