Medicare Assignment: What Does It Mean and How Does It Affect Your Costs?

What does Medicare assignment mean?

Assignment is an agreement between Medicare and a doctor, other health care provider, or supplier. By accepting assignment, the provider agrees to be paid directly by Medicare, accept the Medicare-approved amount for a covered service, and not bill you more than any required deductible, coinsurance, or copayment.

In plain language, assignment helps set the maximum Medicare-recognized price for covered care under Original Medicare. It does not mean the service is free, and it does not guarantee Medicare will cover every service your provider recommends.

How does accepting assignment affect your costs?

When a provider accepts assignment, your out-of-pocket costs are usually lower and more predictable. The provider agrees to charge you only your share of the Medicare-approved amount, such as the Part B deductible and coinsurance when they apply.

For many Medicare Part B services under Original Medicare, after you meet the Part B deductible, you typically pay 20% of the Medicare-approved amount if the provider accepts assignment. Medicare’s 2026 handbook lists the Part B deductible as $283 for 2026.

Providers who accept assignment also must submit your claim directly to Medicare and cannot charge you for submitting the claim.

What if a provider does not accept assignment?

A provider who does not accept assignment may still be enrolled in Medicare. These providers are often called non-participating providers. They can choose whether to accept the Medicare-approved amount for a particular service on a case-by-case basis.

If they do not accept assignment for a covered service, they may be able to charge more than the Medicare-approved amount. Medicare.gov says that in many cases, this extra charge cannot be more than 15% above the Medicare-approved amount. This is called the limiting charge.

You may also have to pay more at the time of service and wait for Medicare to process the claim, depending on the provider’s billing practices.

What if a provider has opted out of Medicare?

Some doctors and other providers choose to opt out of Medicare. If a provider has opted out, Medicare generally will not pay for items or services you get from that provider, except in emergencies.

Opted-out providers may ask you to sign a private contract. If you sign one, you usually agree to pay the provider directly under the contract terms. This is different from using a Medicare-enrolled provider who simply does not accept assignment.

Before signing a private contract, it can be helpful to ask questions about what Medicare will and will not pay.

How does assignment work with medical equipment suppliers?

Assignment is also important for durable medical equipment, often called DME. DME can include items such as walkers, hospital beds, oxygen equipment, and other medically necessary equipment used in the home.

If a DME supplier participates in Medicare, Medicare.gov says the supplier must accept assignment. This means the supplier can charge you only the coinsurance and Part B deductible for the Medicare-approved amount.

If a DME supplier does not participate in Medicare or will not accept assignment, you may be charged more. For rented equipment, ask whether the supplier will accept assignment for every rental month before you receive the equipment.

How can you check before getting care?

Before an appointment or equipment order, ask the office or supplier directly:

• Do you accept Medicare assignment for this service?
• Are you enrolled in Medicare?
• Will you bill Medicare directly?
• What will I owe after Medicare pays?
• If this is rented DME, will you accept assignment for all rental months?

You can also use Medicare’s Care Compare tool to look for Medicare-approved providers near you. If you have a Medicare Advantage plan, contact the plan because network rules and cost-sharing may be different from Original Medicare.

Official Sources