Medicare Payment in 2026: Audit the Split Fee Schedule

A Medicare claim can clear every edit, arrive with a clean remittance, and still deserve a second look. That is especially true in 2026, when the Medicare Physician Fee Schedule no longer operates with one conversion factor for every clinician. Practices that loaded a single Medicare rate table in January may now be comparing payments against the wrong benchmark—or overlooking changes that a conversion-factor update alone cannot explain.

For practice managers closing the third quarter, this is a timely reconciliation problem, not an abstract payment-policy debate. The 2026 fee schedule combines separate conversion factors for qualifying Advanced Alternative Payment Model participants and other clinicians with code-level valuation changes, including an efficiency adjustment affecting many non-time-based services. A practice-wide statement that “Medicare rates went up” is not enough to predict what an individual service should pay.

The useful response is a focused audit: establish which Medicare payment methodology applies, rebuild expected reimbursement from the correct inputs, and separate genuine underpayments from ordinary differences between allowed charges and deposited cash. Done before year-end, that work also produces a cleaner starting point for contract negotiations and the next fee-schedule update.

1. What changed—and why one rate table is no longer enough

Under the final 2026 Medicare Physician Fee Schedule, CMS uses different conversion factors for clinicians who are qualifying APM participants, commonly called QPs, and clinicians who are not. The statutory annual updates differ: 0.75 percent for QPs and 0.25 percent for non-QPs. Both conversion factors also reflect other applicable adjustments, including the temporary 2.5 percent increase enacted for 2026 and budget-neutrality changes.

Those percentages are components of the calculation, not promises about the increase on every claim. A conversion factor translates geographically adjusted relative value units into dollars. If a service’s relative value units change, its payment can move differently from the conversion factor. Site of service, modifiers, and other payment rules further affect the result.

This distinction matters operationally because many billing systems treat “Medicare” as one payer record with one expected-payment schedule. That setup may be insufficient when clinicians within the same organization fall under different conversion factors. The payer name can remain the same while the applicable pricing input differs.

For this audit, start with Original Medicare professional claims paid under the Physician Fee Schedule. Do not mix in hospital outpatient facility claims or assume that Medicare Advantage follows the same pricing automatically. Keeping the initial population narrow makes a discrepancy easier to diagnose.

2. Verify QP status instead of inferring it from participation

Participation in an accountable care organization or another payment model does not, by itself, establish that a clinician receives the QP conversion factor. Qualifying status is a specific CMS determination under the Advanced APM framework. It is not interchangeable with joining a model, signing a participation agreement, or being told that the organization is pursuing value-based care.

Use the CMS Quality Payment Program participation information and applicable CMS instructions to verify the determination relevant to the payment year. QP determinations and their payment consequences operate on a lag; current model participation should not be substituted for the status governing a current claim. Partial QP status should not be treated as full QP status without checking the applicable rules.

Build a controlled roster that connects the clinician’s identifier to the status used in payment reconciliation. Record who checked it, when it was checked, and the source supporting the determination. A screenshot or saved source record is more useful than an undocumented spreadsheet entry labeled “APM: yes.”

Keep enrollment data beside this roster, but do not confuse the two. An accurate rendering NPI and valid reassignment are necessary claim inputs; they do not establish QP status. Conversely, correcting the fee-schedule classification will not fix a claim submitted with the wrong rendering clinician. Give those problems separate owners and separate resolution paths.

• Confirm the rendering clinician’s identity and the payment year being reviewed.
• Verify the applicable QP determination through CMS information, not a marketing description of the model.
• Map that determination to the correct expected-payment calculation.
• Preserve the evidence and establish a process for resolving discrepancies with the Medicare Administrative Contractor.

3. Rebuild expected payment at the service-line level

A useful Medicare benchmark is not last year’s payment plus a percentage. At its core, the Physician Fee Schedule calculation combines work, practice expense, and malpractice relative value units, applies the relevant geographic adjustments, and multiplies the result by the applicable conversion factor. Additional payment rules may then change the payable amount.

Use CMS fee-schedule files and relevant Medicare Administrative Contractor resources for the service date under review. Validate that your software vendor has implemented the applicable conversion-factor distinction. Also check whether later file revisions affect the services in your sample; a rate table described simply as “2026 Medicare” does not tell you which version it contains.

The place of service deserves particular attention. Facility and nonfacility practice expense values can produce materially different professional allowances. A claim for a physician’s office service should not be tested against a hospital outpatient professional rate just because the code and clinician match.

Modifiers require the same discipline. Professional and technical components, bilateral services, assistant-at-surgery rules, multiple-procedure reductions, and other adjustments can make a simple code-to-price lookup misleading. Build these rules into the benchmark or identify affected lines for manual review. Otherwise, the audit will generate a large queue of differences that are correct payments rather than recoverable balances.

• Match the code, service date, locality, place of service, and applicable conversion factor.
• Distinguish facility from nonfacility pricing and global services from separately billed components.
• Apply relevant modifier and payment-policy adjustments.
• Keep the source file version with the calculation so another reviewer can reproduce it.

4. Account for the efficiency adjustment before alleging an underpayment

The conversion-factor split is only part of the 2026 story. CMS also finalized a 2.5 percent efficiency adjustment to work relative value units and corresponding intraservice physician time for many non-time-based services. The policy reflects CMS’s position that efficiencies can develop over time in services whose valuations are not routinely refreshed.

This is not a universal 2.5 percent reduction to every Medicare service, nor is it simply a 2.5 percent cut to the total allowed charge for every affected code. The adjustment targets specified valuation inputs, and CMS excluded categories of services. Evaluation and management services, for example, are excluded. Determine a code’s treatment from the final CMS files rather than applying a blanket reduction across a specialty.

The practical consequence is that a higher conversion factor can coexist with a smaller-than-expected increase—or a decrease—for a particular service. A procedural practice and an office-visit-heavy practice therefore should not expect their Medicare revenue to move in parallel, even if their clinicians have the same QP classification.

Review the practice’s highest-volume and highest-dollar codes individually. Calculate the change in the applicable allowance, then weight that change by actual service volume. This produces a service-mix view of payment pressure. It also prevents staff from appealing correctly priced claims because someone budgeted a uniform increase across the entire charge master.

5. Separate the allowed amount from the bank deposit

The most common analytical mistake in payment reconciliation is comparing the full expected allowance with the payer’s cash payment. Medicare’s payment and the beneficiary’s responsibility are not the same thing. Deductible, coinsurance, coordination of benefits, sequestration, and applicable payment adjustments can all affect the amount received without establishing a fee-schedule pricing error.

Start with the adjudicated service line and explain each movement from the expected allowance to the payment. Identify the amount assigned to the beneficiary or another payer, the contractual adjustment, and any separately identified reduction. Where applicable, distinguish a Merit-based Incentive Payment System adjustment from the underlying fee-schedule allowance.

Then reconcile the remittance to the actual deposit. Provider-level adjustments, recoveries, and other offsets may affect cash without belonging to the current service line being tested. A deposit that is smaller than the sum of expected claim payments can indicate an offset rather than an underpriced procedure.

This is also where automatic posting rules can conceal problems. If the system writes every difference between charges and payment into a contractual adjustment, the account can look settled while a pricing discrepancy disappears. Preserve enough detail to distinguish a valid contract adjustment from patient responsibility, a payment reduction, a recovery, and an unexplained variance. Zero balance is an accounting state, not proof of correct reimbursement.

6. Read Medicare-linked contracts before updating other payers

The Medicare fee schedule often serves as a commercial contracting reference, but that does not make every Medicare change automatically binding on every payer. A Medicare Advantage agreement or commercial contract may use a specified year’s schedule, a proprietary derivative, a fixed conversion factor, or a percentage of a defined Medicare allowance.

The two-conversion-factor structure creates a question worth answering in writing: which reference does the agreement use? A contract stating “a percentage of Medicare” may need closer interpretation than a contract that identifies a particular schedule, year, locality, and update mechanism. Do not assume the QP rate carries into a contracted payer’s calculation merely because it applies to the clinician’s Original Medicare claims.

Review amendments, incorporated reimbursement policies, and the payer’s published implementation instructions alongside the core agreement. Where the language is unclear, request clarification through the contracting channel and preserve the response. A call-center representative’s claim-status explanation is not necessarily an authoritative contract interpretation.

Practices using external medical billing services should ask for separate expected-payment tables for Original Medicare and each Medicare-linked agreement. Outsourcing should not collapse distinct reimbursement methods into one convenient benchmark. Require the vendor to show both the contractual basis and the calculation behind any proposed recovery.

• Which Medicare schedule and year does the agreement reference?
• Does it incorporate annual updates automatically or require an amendment?
• How does it address the applicable conversion factor, locality, and site of service?
• Which payer-specific reductions or exclusions apply after the reference amount is calculated?

7. Run a targeted fourth-quarter audit, not a random claim hunt

As September closes, begin with a sample designed to expose configuration errors. Include clinicians from each applicable QP classification, major service categories, relevant places of service, and several payment dates. Add both straightforward lines and lines subject to modifier-based adjustments. This tests the logic of the payment system rather than merely counting exceptions.

Prioritize by potential impact. High-volume codes can create substantial cumulative leakage from small per-line errors. High-dollar procedures can justify investigation even when the affected claim count is low. A repeated difference across one clinician’s claims may point to status mapping; a difference isolated to one location may point to locality or facility pricing.

Classify each variance before expanding the sample. Useful categories include an incorrect internal benchmark, a claim-data problem, an apparent payer pricing error, a posting error, and a contract-interpretation issue. These categories require different remedies. Sending all of them to an appeal team wastes time and makes recovery reports unreliable.

Give the project a short initial cycle: validate the sources, test a manageable sample, identify repeatable patterns, and expand only where the evidence supports it. If outside billing audit support is involved, require reproducible calculations and a documented distinction between confirmed recoverable amounts and unresolved estimates. A large spreadsheet labeled “underpayments” is not a recovery result.

8. Match the correction route to the actual defect

Once a variance is validated, choose the appropriate correction mechanism. Incorrect claim information may call for a correction or reopening, depending on the circumstances and contractor instructions. A disputed payment determination may require an appeal. A misunderstanding of the organization’s QP status requires investigation of the underlying status and payment implementation, not repeated resubmission of an unchanged claim.

For Original Medicare, an initial redetermination request generally must be filed within 120 days after receipt of the initial determination. Other correction routes have their own conditions and time limits. Do not assume that a payer inquiry, spreadsheet submission, or vendor ticket preserves appeal rights.

Build an evidence packet concise enough for another person to evaluate without reconstructing the account. It should identify the service line, explain the applicable pricing method, show the expected and actual amounts, and state precisely what needs correction. Avoid broad allegations that the payer “used the wrong Medicare rate” when the actual issue is a facility designation or modifier.

Track money through to posting. A favorable response is not the same as a recovered payment, and a replacement remittance may affect beneficiary responsibility or secondary billing. Reconcile the revised transaction, correct downstream balances, and confirm that the underlying configuration changed when the problem was systemic.

• Record the determination date, applicable deadline, and chosen correction route.
• Attach the claim and remittance details plus the authoritative pricing source.
• Show a service-line calculation rather than an unsupported total.
• Verify the eventual adjustment, cash receipt, and any necessary secondary-claim correction.

9. Make the audit a payment-control process

The durable fix is a better-controlled expected-payment system. Assign responsibility for clinician-status verification, CMS file updates, contract interpretation, posting rules, and variance resolution. These tasks may sit with different people, but they need one documented handoff process.

Monitor explained and unexplained variances separately. Track confirmed underpayments, recoveries actually posted, aging against correction deadlines, and recurring configuration defects. Do not reward the team for generating the largest theoretical recovery total; reward it for resolving valid exceptions and preventing their return.

For the next budget cycle, separate finalized payment policy from proposed changes and temporary provisions. The additional statutory increase for 2026 should not be treated as a permanent annual assumption. Model future reimbursement only after identifying which inputs continue and which remain uncertain.

The 2026 Medicare changes make a familiar lesson harder to ignore: a paid claim is not necessarily a correctly paid claim. Before year-end, test the benchmark itself. That is where a focused reconciliation project can protect revenue without turning every remittance into an appeal.