Medicare Participation: Make the Right Year-End Election

A Medicare participation election looks like paperwork until someone changes the practice-management system. Then it becomes a collection policy, a patient conversation, and potentially a compliance problem. For practices weighing their Medicare economics this fall, the important question is not simply whether next year’s payment rates cover their costs. It is whether participating, remaining enrolled as nonparticipating, or pursuing a valid opt-out arrangement would produce the financial and operational result the owners actually expect.

As of October 20, 2026, practices have a useful planning window before year-end participation decisions for 2027. The danger is treating three very different choices as interchangeable. Nonparticipating does not mean outside Medicare. Accepting assignment is not the same as participating. Opting out is not a switch a billing manager can flip when a claim pays poorly. Before leadership approves a change, the revenue cycle team should translate each option into allowed charges, payment routing, patient liability, enrollment requirements, and staff work. That exercise often changes the decision.

1. Define the decision before comparing the money

A participating physician or supplier agrees to accept assignment on all Medicare-covered services within the scope of the participation agreement. Accepting assignment means accepting the Medicare-approved amount as payment in full, with the beneficiary responsible only for applicable deductible and coinsurance. It does not eliminate those patient obligations, and it does not guarantee that every submitted claim is covered.

A nonparticipating physician remains enrolled in Medicare but has not entered into that participation agreement. For services where assignment is optional, the physician can accept assignment claim by claim. The lower nonparticipating fee schedule still applies when that physician accepts assignment; assignment alone does not restore participating payment rates.

Opting out is different. Eligible physicians and practitioners who properly opt out use private contracts with Medicare beneficiaries under specific federal requirements. That is not an annual participation election, and it cannot be accomplished simply by declining to submit claims.

Start by confirming the practice’s current status with its Medicare Administrative Contractor, or MAC. Do not infer it from a provider directory or one remittance. In a group, participation questions must be reconciled with the billing entity, individual enrollments, and reassignment arrangements. A physician’s preference does not automatically establish the status of claims billed through the group.

2. Nonparticipating does not mean unrestricted pricing

The central misunderstanding is that a nonparticipating practice can set any Medicare patient price it wants. For physician services subject to Medicare’s limiting-charge rules, it cannot.

The nonparticipating Medicare-approved amount generally equals 95% of the participating physician fee schedule amount. On an unassigned claim subject to the limiting charge, the federal ceiling is generally 115% of that reduced amount. Together, those rules produce a maximum charge equal to 109.25% of the participating fee schedule amount—not 115% of the participating amount.

That ceiling is a charge limit, not a collection forecast. The practice may take on more patient collection work, and Medicare payment on an unassigned claim generally goes to the beneficiary rather than the practice. Supplemental coverage can also affect how balances are processed; staff should verify the actual coordination rules instead of assuming that every secondary payer will send money directly to the office.

State law may impose additional restrictions. Certain services and practitioner categories also have different assignment or payment requirements. Before modeling a nonparticipating strategy, identify which services can legally be billed without assignment. Applying a single markup across the entire Medicare charge master is not a defensible implementation plan.

3. Follow one claim all the way to the patient balance

Consider a simplified illustration for a physician service with a participating Medicare-approved amount of $100. Assume the beneficiary has met the deductible, the service is covered, and no secondary coverage applies. These figures illustrate the basic participation rules before sequestration or other payment adjustments; they are not a forecast of a particular claim.

For a participating physician accepting assignment, the basic split is $80 from Medicare and $20 in beneficiary coinsurance. For a nonparticipating physician accepting assignment, the approved amount is $95. The corresponding basic split is $76 from Medicare and $19 from the beneficiary. Accepting assignment on that claim does not permit a charge above the $95 approved amount.

For a nonparticipating physician submitting an unassigned claim subject to the federal limiting charge, the maximum charge would be $109.25. Medicare’s basic benefit would be $76, generally paid to the beneficiary. The beneficiary’s ultimate out-of-pocket amount would be $33.25 without supplemental coverage: $19 in coinsurance plus $14.25 above the nonparticipating approved amount.

The practice’s theoretical revenue advantage over participating status is therefore $9.25 in this example, not $15. Whether that advantage survives depends on collections, payment timing, patient retention, and administrative cost. If leadership sees only the maximum charge, it has not yet seen the business case.

4. Identify the claims where assignment is not optional

A participation analysis needs a compliance filter before it needs a spreadsheet. Some Medicare services and practitioner categories require assignment regardless of a general preference for nonparticipating billing. Drugs and biologicals covered under Part B, for example, have mandatory-assignment requirements. Nonphysician practitioner rules also require separate review rather than a blanket application of physician limiting-charge logic.

Qualified Medicare Beneficiary protections are another essential stop. Providers may not bill people enrolled in the QMB program for Medicare Part A or Part B deductibles, coinsurance, or copayments. That prohibition applies even when the provider is not enrolled in Medicaid and even when the state Medicaid program pays little or nothing toward the cost sharing. Nonparticipating status does not create an exception.

Nor does a financial notice create permission to disregard Medicare’s billing limits. An Advance Beneficiary Notice of Noncoverage addresses potential liability in specified coverage situations. It is not a substitute for a private contract, a waiver of QMB protections, or authorization to exceed the limiting charge on a covered service.

Have compliance or qualified counsel review the proposed billing approach before anyone changes charge rules. The review should produce explicit exclusions that the billing system can enforce, not merely a general instruction to staff to be careful.

• Separate physician services from services and practitioner categories subject to mandatory assignment.
• Build a reliable process for identifying QMB status and preventing prohibited beneficiary bills.
• Check applicable state balance-billing restrictions.
• Distinguish coverage-related notices from assignment and participation decisions.

5. Model collected revenue, not the highest legal charge

Use the practice’s own service mix, payer mix, and collection history. A useful model compares participating collections, nonparticipating collections with assignment, and nonparticipating collections without assignment where permitted. Each scenario should include payment timing and the cost of collecting from patients.

Do not carry the current collection rate into a higher-liability scenario without testing it. A practice accustomed to collecting coinsurance after Medicare and a supplement have processed may struggle when beneficiaries receive Medicare reimbursement themselves. More upfront collection can also mean more refunds, calls, and reconciliation work.

Use the final 2027 Medicare Physician Fee Schedule amounts and applicable locality data when available, rather than building an irreversible decision around proposed rates. Keep the participation calculation separate from other payment adjustments so a favorable or unfavorable adjustment is not mistaken for the effect of the election.

If an outside team provides medical billing services, ask it to produce a claim-level scenario using actual procedures and recent payment behavior. A projection based only on total Medicare charges conceals too much variation. The deliverable should show expected net collections and days to cash, not simply a larger patient balance.

• Measure the additional collectible revenue after assignment restrictions and patient protections.
• Estimate added statement, call-center, refund, and collection costs.
• Stress-test slower payment and lower patient collection rates.
• Include possible changes in appointment demand and referral relationships.

6. Treat opting out as a separate legal and clinical project

Opting out deserves its own decision process. It is available only to eligible physicians and practitioners, not universally to every Medicare-enrolled supplier or entity. It requires a compliant affidavit and compliant private contracts with beneficiaries. Medicare generally does not pay for services furnished under those private contracts, subject to limited rules such as those involving emergency or urgent care.

An opt-out period generally lasts two years and automatically renews unless properly canceled. Participating physicians and practitioners also face special timing rules when initiating an opt-out. These requirements make it very different from an annual decision about whether to sign or terminate a participation agreement.

A practice cannot selectively opt out for one lucrative procedure while continuing ordinary Medicare billing for its other covered services. Nor should staff assume that a patient’s willingness to pay cash resolves the issue. Without a valid exception or properly established opt-out arrangement, Medicare claim-submission obligations and charge restrictions may still apply.

The review also needs to address group reassignment, services furnished in other settings, and any Medicare Advantage contractual implications. An Original Medicare participation election does not itself rewrite a Medicare Advantage contract. Before announcing a cash-pay transition, obtain advice tailored to the practitioner and the intended scope of services.

7. Make the enrollment record and billing system agree

An approved decision is only the beginning. Build an implementation record that identifies the legal billing entity, affected clinicians, Medicare identifiers, relevant MAC, intended status, and effective date. Resolve uncertainty about individual versus group participation before submitting documents.

CMS-460 is the Medicare Participating Physician or Supplier Agreement. Existing participants generally do not need to file a new agreement every year simply to remain participating. Practices seeking to change status should follow their MAC’s current annual-election instructions. Ending participation requires the appropriate notice; changing a field in practice-management software is not notice to Medicare.

For a change intended to take effect January 1, 2027, December 31, 2026, is generally the year-end election deadline. Confirm the contractor’s specific submission requirements, including how it treats receipt, postmarks, and acceptable delivery methods. Keep evidence of submission and obtain confirmation rather than relying on an assumption that paperwork was processed.

Whether handled internally or through payer enrollment support, one person should own the status reconciliation. That person needs access to both the enrollment documentation and billing configuration. Otherwise, enrollment staff can complete the administrative change while billers continue submitting claims under the old assumptions.

Test date-of-service handling carefully. A January submission for a December service should not automatically receive January’s participation treatment merely because it entered the clearinghouse after the new year.

8. Rewrite the patient conversation before sending statements

“We still take Medicare” is not an adequate explanation of nonparticipating status. Patients may reasonably hear that phrase as a promise that Medicare will pay the office and their financial responsibility will stay familiar. If payment routing or collection expectations are changing, explain those details before the visit.

Use separate scripts for participating billing, nonparticipating assigned claims, and nonparticipating unassigned claims. Staff should know whether the practice expects payment at the visit, who generally receives Medicare reimbursement, and how any supplemental insurance will be handled. Avoid promises about a supplement until benefits and processing rules have been verified.

The same precision belongs in estimates and statements. A covered-service balance should not be labeled “noncovered” merely because part of the charge exceeds the nonparticipating approved amount. Likewise, a patient account should not enter collections while staff are still determining whether QMB protections or a posting error apply.

Train clinicians as well as reception and billing staff. A clinician who tells a patient that Medicare will reimburse the full visit charge can undo an otherwise accurate financial explanation. Consistent language reduces surprise, but it also protects staff from having to defend contradictory promises after care has already been delivered.

9. Use the remaining weeks to make a controlled decision

The practical goal for late October is a verified starting point: current participation status, affected billing arrangements, service-specific restrictions, and actual collection performance. Leadership should not vote on a change while those facts remain unresolved.

In November, finish the financial scenarios and legal review, incorporating final payment information as it becomes available. Decide whether the expected gain is large enough to justify the operational burden. Remaining participating can be a deliberate financial choice, not evidence that the practice failed to negotiate with reality.

In December, complete any required election notice early enough to resolve submission problems. Finalize patient communications, system testing, staff education, and a January monitoring plan. The first review should inspect actual claims and statements rather than wait for month-end revenue totals.

Watch for incorrect assignment indicators, charges above applicable limits, payment routed differently than expected, and prohibited patient balances. Those errors can remain hidden inside apparently healthy gross revenue.

The strongest Medicare participation decision is the one the practice can explain on a single claim: what it may charge, who should pay, what the patient legally owes, and how much the office realistically expects to collect. If those answers are not clear, the election is not ready.