Guide

Billed, allowed, paid: the three-number anatomy of every claim

Summary

Every adjudicated claim carries three numbers: what you billed, what the payer's contract or fee schedule allows for that code, and what actually gets paid after patient responsibility. The gap between billed and allowed is a contractual write-off you agreed to when you joined the network, reported on the remittance as a specific adjustment — not a discount the payer invented and not money you're owed back.

By Gale Editorial · Updated 2026-07-26. Every figure cited to a dated source. How we write.

Why do payers pay so much less than I bill?

Because a claim carries three separate numbers, not one. The billed amount is your own charge, set on your fee schedule. The allowed amount is the maximum the payer's contract or fee schedule permits for that code, regardless of what you billed. The paid amount is the allowed amount minus whatever the patient owes — deductible, coinsurance, or copay. The gap between billed and allowed is a contractual write-off, not underpayment.

That write-off exists because joining a payer's network means agreeing to accept its allowed amount as full payment for covered services, so billing above it doesn't get you more — it just widens the write-off line on the remittance. Understanding which of the three numbers moved is the first step in reading remits correctly rather than reacting to the total as if it were one figure.

The billed amount: yours to set, mostly irrelevant to what you're paid

The billed charge is the number your own fee schedule sets for a code, and for an in-network claim it mostly doesn't determine payment as long as it sits at or above the allowed amount. Billing higher than the allowed amount doesn't recover more money on a contracted claim; billing at or below it can, in some cases, cap what you're even eligible to collect.

That asymmetry is why underpricing charges carries its own real risk: a billed amount set too low can become the ceiling on what a payer will pay, even when the actual allowed amount is higher. The safer default most practices use is billing consistently at or modestly above the highest allowed amount across their payer mix, so the billed figure never accidentally becomes the limiting number.

The allowed amount: where it actually comes from

For Medicare, the allowed amount comes directly from the Physician Fee Schedule, which sets payment for clinician services and is republished annually through rulemaking 1Ref 1Centers for Medicare & Medicaid Services (2026).Physician Fee Schedule.That the Medicare Physician Fee Schedule sets the allowed amount for clinician services and is updated annually through rulemaking, rather than negotiated per practice. As of July 2026.. It isn't negotiated per practice — it's a published national and locality-adjusted rate you can look up directly through CMS's own fee schedule search tool before you ever submit the claim 2Ref 2Centers for Medicare & Medicaid Services (2026).Physician Fee Schedule Search.That CMS publishes a public search tool where a clinician can look up the exact national and locality-adjusted allowed amount for a CPT/HCPCS code, letting the amount be verified rather than assumed..

Commercial payers work differently: each contract negotiates its own allowed amounts, often expressed as a percentage of the Medicare rate rather than a flat dollar figure. That means the same code can carry a different allowed amount in every contract you hold, which is exactly why your fee schedule needs to be built from what each payer actually allows, not from one assumed number.

Reading the write-off on the remittance

The gap between billed and allowed shows up on the remittance as a specific adjustment, most commonly the reason code meaning the charge exceeds the fee schedule or maximum allowable amount — the standard, X12-maintained list of codes explaining why a line paid differently than billed 3Ref 3X12 (2026).Claim Adjustment Reason Codes.That CARCs are the standard code list explaining why a claim or service line was paid differently than billed, including the contractual adjustment for a charge exceeding the allowed amount.. Seeing that adjustment on an in-network claim is expected, not a sign something went wrong.

When the adjustment needs more explanation than the reason code alone provides, a remark code supplies the specific detail behind it 4Ref 4X12 (2026).Remittance Advice Remark Codes.That RARCs supply the supplemental explanation on a remittance beyond the CARC, giving the specific detail behind a contractual adjustment when the reason code alone isn't enough to act on.. Reading both together, rather than just the dollar total, is what tells you whether a reduced payment is the ordinary contractual write-off or something that actually needs a closer look.

The paid amount: allowed minus patient responsibility

Once the allowed amount is set, the paid amount is what's left after patient responsibility comes out of it — the deductible, coinsurance, or copay the patient's plan assigns to that service. This is where the group code on the remittance matters: a contractual adjustment belongs to you and can't be billed to the patient, while a patient-responsibility amount is yours to collect from them, not to write off.

Confusing the two is a common, costly mistake. Writing off a patient-responsibility balance because it looks similar to the contractual adjustment above it gives away money you're actually owed; billing a patient for a true contractual write-off is a compliance problem with your own network agreement, not a billing choice.

Why this matters for how you set your billed charge

Because the allowed amount, not the billed amount, drives payment on a contracted claim, the billed figure's real job is to never accidentally become the limiting number. Many practices set their billed charge as a multiple of the highest Medicare-referenced allowed amount across their payer contracts, which keeps the write-off consistent and predictable rather than reactive.

The practical discipline is periodic, not one-time: rates change annually when the fee schedule updates, so a billed amount that comfortably cleared every allowed amount two years ago can quietly fall behind. Revisiting your fee schedule on a fixed cadence, rather than only when a payment looks off, keeps the billed number doing its job instead of becoming an afterthought.

Checking whether your allowed amount is actually right

The allowed amount on a remittance is only correct if it matches what the contract or fee schedule actually specifies for that code, in that locality, in that year — and it's worth verifying rather than assuming the payer's math is always right. For Medicare-referenced amounts, the fee schedule search tool gives you the number to check against directly 2Ref 2Centers for Medicare & Medicaid Services (2026).Physician Fee Schedule Search.That CMS publishes a public search tool where a clinician can look up the exact national and locality-adjusted allowed amount for a CPT/HCPCS code, letting the amount be verified rather than assumed..

Building out expected pay by code by payer turns this from a one-off check into a running comparison: once you know what each payer should allow for your most common codes, a remittance that pays less than expected is a signal worth investigating rather than a number you simply accept. That comparison is also the foundation for underpayments detection — most underpaid claims don't announce themselves, they just look like an ordinary write-off until someone checks the math.

Common questions

The billed amount is your own charge for the service, set on your fee schedule. The allowed amount is the maximum the payer's contract or fee schedule permits for that code, regardless of what you billed. On an in-network claim, the allowed amount — not your billed charge — is what actually determines payment, as long as your billed amount is at or above it.

No. That gap is a contractual write-off you agreed to when you joined the payer's network, reported on the remittance as a standard adjustment. It isn't an underpayment and it isn't something to appeal — it's the normal mechanics of an in-network contract, distinct from an actual denial or a genuinely incorrect allowed amount.

Directly from the Medicare Physician Fee Schedule, a published, annually updated rate you can look up by code, year, and locality through CMS's own search tool before you ever submit a claim. It isn't negotiated per practice the way a commercial contract is — it's the same published number for every clinician billing that code in that locality.

No, not on an in-network claim. Once your billed amount is at or above the allowed amount, billing higher only widens the contractual write-off line — it doesn't change what the payer pays. The real risk runs the other direction: billing below the allowed amount can cap what you're eligible to collect.

Compare the allowed amount on the remittance against what you expect that payer to allow for that code, based on the contract or the published fee schedule. If they match, the reduced payment is an ordinary contractual adjustment. If the allowed amount itself is lower than it should be, that's a genuine underpayment worth pursuing, not a write-off to accept.

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References

1.Centers for Medicare & Medicaid Services (2026). Physician Fee Schedule. Centers for Medicare & Medicaid Services (CMS). link ✓That the Medicare Physician Fee Schedule sets the allowed amount for clinician services and is updated annually through rulemaking, rather than negotiated per practice. As of July 2026.
2.Centers for Medicare & Medicaid Services (2026). Physician Fee Schedule Search. Centers for Medicare & Medicaid Services (CMS). link ✓That CMS publishes a public search tool where a clinician can look up the exact national and locality-adjusted allowed amount for a CPT/HCPCS code, letting the amount be verified rather than assumed.
3.X12 (2026). Claim Adjustment Reason Codes. X12. link ✓That CARCs are the standard code list explaining why a claim or service line was paid differently than billed, including the contractual adjustment for a charge exceeding the allowed amount.
4.X12 (2026). Remittance Advice Remark Codes. X12. link ✓That RARCs supply the supplemental explanation on a remittance beyond the CARC, giving the specific detail behind a contractual adjustment when the reason code alone isn't enough to act on.

https://www.gale.care/for-providers/cm-allowed-amount-vs-billed · 4 sources. Competitor details are cited to dated public sources and maintained as they change; figures are estimates, not commitments. Synthetic demonstration.

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