What Is the Allowed Amount? Billed vs Allowed vs What You Owe

The Number That Decides Everything

The allowed amount is the price your insurer and your provider have agreed on for a service. Not what the provider charges. Not what the insurer pays. The agreed price that everything else is calculated from.

Almost every confusing medical bill comes down to not knowing this. The charge is a sticker price that nobody with insurance pays. The allowed amount is the real one, and your share is a slice of it.

One Service, Four Numbers

Line on your EOB	What it means	Example
Billed charge	The provider’s list price	$400
Allowed amount	The contracted price	$250
Contractual adjustment	Written off, never billable to you	$150
Plan paid / you owe	The allowed amount split between you and the plan	$200 / $50

The $150 adjustment is the part people miss. The provider agreed to accept $250 as full payment in exchange for being in the network. They cannot come back for the remaining $150, and a bill that tries to is a billing error, not a debt.

Where the Allowed Amount Comes From

For in-network care, it comes from the contract between the provider and your insurer — a negotiated fee schedule listing a price per service code. The provider agreed to those prices to be listed in the network and receive the patient volume that comes with it.

For Medicare, it comes from the Medicare Physician Fee Schedule, which is published and adjusted for your geographic area. For Medicaid, the state sets it. For commercial plans it is privately negotiated, which is why the same service has a different allowed amount at two practices across the street from each other.

Out of network, there is no contract and therefore no agreed price. Your plan applies its own allowable, which is usually lower, and the provider has not promised to accept it. The difference can be billed to you — that is balance billing, and it is the single most expensive difference between in-network and out-of-network care. The No Surprises Act restricts it in specific situations, but not everywhere.

How Your Share Is Calculated From It

Once the allowed amount is set, your cost sharing applies to that figure, in order:

Deductible first. Unmet deductible means you pay the allowed amount in full until it is satisfied.

Copay, if the plan uses one — a flat amount tied to the visit type.

Coinsurance on what is left — a percentage of the balance after the deductible, not of the whole allowed amount.

Out-of-pocket maximum caps it. Once reached, the plan pays 100% of allowed amounts for the rest of the year.

Work your own numbers through the patient responsibility calculator or, if it is a straight percentage split, the coinsurance calculator.

When the Allowed Amount Looks Wrong

It sometimes is. A claim processed at the wrong rate, against the wrong contract, or with the wrong network status produces an allowed amount lower than it should be — and nothing on the remittance flags it.

For patients: compare the EOB against the bill. If the practice is billing you more than the EOB says you owe, query it before paying. How to read your EOB walks through it line by line.

For practices: compare the allowed amount against your contracted fee schedule, not against your charge. The underpayment calculator shows what a small per-claim gap costs across a year, and it is usually more than expected. Note that CO-45 is the normal contractual adjustment, not an underpayment — the two get confused constantly.

What to Take From This

If you only remember one thing: the billed charge is not a real number for anyone with insurance. The allowed amount is where your bill actually starts, your share is a portion of it, and the gap between charge and allowed is somebody else’s write-off, not your debt.

Frequently Asked Questions

What is the allowed amount on a medical bill?

The price your insurer and provider have contracted for a service. It is not the provider's list price and not what the plan pays — it is the agreed figure that both the plan's payment and your share are calculated from.

What is the difference between the billed amount and the allowed amount?

The billed amount is the provider's list price. The allowed amount is what they agreed to accept under their network contract. The difference is the contractual adjustment, which is written off and cannot be billed to you.

Do I have to pay the difference between the billed and allowed amount?

Not for in-network care. The provider agreed to accept the allowed amount as payment in full, so the difference is written off. Out of network there is no such contract, and the provider may bill you the difference — that is balance billing, restricted in some situations by the No Surprises Act.

How is the allowed amount decided?

For in-network care, by the contract between provider and insurer — a negotiated fee schedule per service code. Medicare uses its published Physician Fee Schedule adjusted for geography, states set Medicaid rates, and commercial rates are privately negotiated, which is why the same service can have different allowed amounts at two nearby practices.

How do I calculate what I owe from the allowed amount?

Apply your cost sharing to the allowed amount in order: remaining deductible first, then any copay, then coinsurance as a percentage of what is left after the deductible — not of the full allowed amount — capped by your out-of-pocket maximum.

What Is the Allowed Amount?