
A Medicare crossover claim, commonly known as a Medicare crossover, occurs when a Medicare insurance holder is also eligible for another benefit. In such cases, healthcare providers submit medical claims to Medicare only. After making its portion of the payment, Medicare automatically transfers these claims to the secondary payer, usually Medicaid. This means that Medicare beneficiaries with dual eligibility only have to file one claim for their services.
| Characteristics | Values |
|---|---|
| Definition | A Medicare crossover claim occurs when a Medicare insurance holder is also eligible for another benefit, such as Medicaid. |
| Who is eligible? | People with both Medicare and Medicaid are known as "dual eligibles" and account for about 20% of Medicare beneficiaries (12.1 million people). |
| Process | Healthcare providers submit medical claims to Medicare only. After making its portion of the payment, Medicare automatically transfers these claims to the secondary payer, usually Medicaid. |
| Benefits | Crossover claims reduce the administrative burden on healthcare providers, minimize the risk of errors, and increase the efficiency of the billing process. |
| Claim Submission | Medicare crossover information should be entered only for claims that were billed to Medicare first. |
| Claim Rejection | If your Medicaid crossover claims are getting rejected, it may be due to mismatched address information. Ensure that the addresses on file with both Medicare and Medicaid are the same. |
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What You'll Learn

Understanding Medicare crossover claims
Medicare crossover claims refer to the process where a Medicare insurance holder is also eligible for another benefit, often Medicaid. In such cases, healthcare providers submit medical claims to Medicare only. After making its portion of the payment, Medicare automatically transfers these claims to the secondary payer, usually Medicaid. This process is known as a crossover claim because the claim crosses over from Medicare to another insurer.
Medicare beneficiaries who are also eligible for Medicaid are known as "dual eligibles". This dual eligibility means that Medicare claims should automatically cross over to Medicaid, which would cover Medicare cost-sharing (deductibles, co-pays, and coinsurance). This process reduces the administrative burden on healthcare providers and minimises the risk of errors in the billing process.
The Coordination of Benefits Agreement (COBA) is a contract between Medicare, the Centers for Medicare and Medicaid Services (CMS), and other insurers. This agreement facilitates the sharing of payment information between Medicare and Medicaid or other insurers. The Benefits Coordination & Recovery Center (BCRC) typically oversees the entire crossover process on behalf of CMS.
To successfully bill Medicare crossover claims, healthcare providers should follow these steps:
- Submit a medical claim to Medicare after treating a Medicare beneficiary.
- Medicare processes the claim and determines its portion of the payment, which it pays to the healthcare provider.
- Medicare then transfers the processed claim to the secondary payer, usually Medicaid, through the COBA.
- The secondary insurer processes the claim and pays the remaining amount.
It is important to note that Medicare crossover claims only occur when Medicare is the primary payer. Additionally, Medicare crossover information should only be entered for claims that were billed to Medicare first.
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How to submit a crossover claim
A crossover claim is for patients eligible for both Medicare and Medicaid. In this case, Medicare pays part of the claim, and Medicaid covers the remaining deductible or coinsurance. Crossover claims occur when a Medicare insurance holder is also eligible for another benefit. In such cases, healthcare providers submit medical claims to Medicare only. After making its portion of the payment, the federal health insurance program automatically transfers these claims to the secondary payer.
To submit a crossover claim, you can either submit it electronically via the Medicare Administrative Contractor (MAC) or manually. Individual healthcare providers, like doctors and therapists, can use the CMS-1500 claim form to file manual claims. However, if you work in a hospital, nursing home, or rehabilitation center, use the UB-04 to submit the claim. After this, Medicare will process the claim and automatically send your claim to the secondary payer.
If your Medicaid crossover claims are getting rejected, it may be due to the address you have on file with Medicare and Medicaid. When Medicare crosses over your claim to Medicaid, these address fields are submitted: Master address, and Pay-to (or remit address) (if they are different on Medicare’s system). You can verify that you have the exact same addresses on file with both Medicare and Medicaid. If Medicaid does not have the same addresses in their file, Medicaid will reject the claim.
- Log in to the Provider Web Portal.
- On the Submit Professional Claim: Step 1 page, select "Crossover Professional" from the "Claim Type" drop-down and complete all applicable fields under the Provider Information, Member Information, and Claim Information sections. Do not check the "Include Other Insurance" box under the Claim Information section.
- On the Submit Professional Claim: Step 2 page, complete all applicable fields under the Diagnosis Codes section and then click "Add." Repeat until all diagnosis codes have been added, then click "Continue."
- On the Submit Professional Claim: Step 3 page, under the Medicare Crossover Details section, enter the associated Medicare crossover information for each service line. Click "Add" to repeat the process until all service detail lines have been added. Once complete, click "Submit."
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Reasons for crossover claim rejection
A crossover claim is when a Medicare insurance holder is also eligible for another benefit, such as Medicaid. In such cases, healthcare providers submit medical claims to Medicare only. After making its portion of the payment, Medicare automatically transfers these claims to the secondary payer.
Medicaid crossover claims may be rejected for the following reasons:
- Inconsistent Address Information: When Medicare crosses over your claim to Medicaid, address fields like Master Address and Pay-to (or remit address) are submitted. If the address details do not match those on file with Medicaid, the claim will be rejected. It is important to ensure that the addresses on file with both Medicare and Medicaid are identical and up-to-date, preferably using the ZIP+4 format.
- National Provider Identifier (NPI) Not Enrolled with Medicaid: The NPI used on your Medicare claim must be enrolled with Medicaid. If the NPI is not enrolled, the crossover claim will be rejected, and a notification of the rejection will be sent by Medicare.
- Medicare Denying Part of the Claim: If Medicare denies part of the claim, the paid portions will be crossed over to Medicaid. However, providers must resubmit an adjustment to Medicaid to include the denied lines.
- Duplicate Claims: If a provider submits a claim directly to Medicaid for a patient who also has Medicare, and the crossover claim from Medicare is processed first, the provider-submitted claim will be denied as a duplicate.
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The role of the Coordination of Benefits Agreement (COBA)
The Coordination of Benefits Agreement (COBA) is a contract between Medicare, the Centers for Medicare and Medicaid Services (CMS), and other insurers. It standardizes the way that eligibility and Medicare claims payment information is exchanged within a claims crossover context. COBA permits other insurers and benefit programs (known as trading partners) to send eligibility information to CMS and receive Medicare claims data for processing supplemental insurance benefits from CMS' national crossover contractor, the Benefits Coordination & Recovery Center (BCRC).
BCRC oversees the entire crossover process on behalf of CMS. After treating a Medicare beneficiary, a healthcare provider submits a medical claim to the federal health insurance program. Medicare then processes the medical claim and pays its portion of the service or treatment. Since Medicare is the primary payer, it then transfers the processed claim to the secondary payer, usually Medicaid, through the COBA. This automatic transfer of claims information to Medicaid or other insurance companies is known as a crossover claim.
The crossover process reduces the administrative burden of healthcare providers, minimizes the risk of errors, and increases the efficiency of the billing process. For example, a healthcare provider performing an appendectomy on a senior patient with Medicare can bill Medicare for $8,350. Medicare processes the claim and pays $6,250 according to the patient's plan. After paying its portion, Medicare sends the processed claim to the patient's secondary payer, which, in this case, is Medicaid. The secondary insurer then processes the claim and pays the remaining amount.
It is important to note that Medicare crossover claims only occur when Medicare is the primary payer. Additionally, the NPI used on the Medicare claim must be enrolled with Medicaid for the crossover claim to be processed. If the NPI is not enrolled, the claim will be rejected, and a notification of the rejection will be sent by Medicare.
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The process after treating a Medicare beneficiary
After treating a Medicare beneficiary, a healthcare provider submits a medical claim to the federal health insurance program. Medicare then processes the medical claim. The federal health insurance company determines its portion of the payment (from the patient’s insurance plan) and pays it to the healthcare provider. Since Medicare is the primary payer, it pays a significant amount of the provided service or treatment.
Medicare then transfers the processed claim to the secondary payer, usually Medicaid, through the Coordination of Benefits Agreement (COBA). This COBA is a contract between Medicare, the Centers for Medicare and Medicaid Services (CMS), and other insurers. Medicare claim crossovers only occur when Medicare is the primary payer.
The secondary insurer then processes the claim and pays the remaining amount. For example, the Medicaid program in New York receives processed Medicare claims from BCRC, which acts as a bridge between Medicare and Medicaid in the state.
If Medicare denies part of the claim, the paid portions (with PR codes) will be crossed over to Medicaid. Providers must resubmit an adjustment to Medicaid to include the denied lines. If your NPI is not enrolled with Medicaid, the crossover claim will be rejected, and you will receive a notification from Medicare about the rejection. Ensure that the addresses on file with both Medicare and Medicaid match. If they don’t, Medicaid may reject your crossover claim.
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