One of the most common misunderstandings about Medicare opt-out is that it works like a menu. The practice opts out for concierge patients, bills Medicare for everyone else. Or the practice opts out for one service line but keeps billing Medicare for another.
CMS is clear that this is not how opt-out works.
CMS specifically says a provider cannot choose to opt out of Medicare for some Medicare patients and services but not for others. The opt-out applies to the provider. It is not a per-patient or per-service switch.
This article covers what mixed-status actually means under the rules, where the confusion comes from, and what the billing workflow needs to handle when a practice has opted-out and non-opted-out providers in the same group. It is not legal advice. Practices should confirm the details with their Medicare Administrative Contractor and counsel.
What CMS says about selective opt-out
The regulations and CMS guidance describe opt-out as a provider-level status. When a physician or practitioner opts out of Medicare:
- The provider agrees not to bill Medicare for covered services furnished to Medicare beneficiaries during the opt-out period, except in limited emergency or urgent-care situations.
- The provider uses private contracts with Medicare beneficiaries for covered services.
- Medicare payment is not made for the provider’s services during the opt-out period.
CMS does not provide a mechanism for a provider to be simultaneously opted out for some Medicare patients or services and opted in for others. The status applies to the provider across all Medicare beneficiaries and all Medicare-covered services.
Where the confusion comes from
The confusion typically comes from three places.
Concierge marketing language
Some concierge models describe a pathway where the physician offers a membership to some patients while continuing to bill Medicare for others. If the physician has not opted out of Medicare, they can bill Medicare for Medicare patients and collect membership fees separately for access-level services that Medicare does not cover. That is not opt-out. That is a concierge model where the physician is still enrolled in Medicare.
The problem arises when the practice assumes that opting out is required for the concierge model and files an opt-out affidavit, then tries to continue billing Medicare for non-member patients. Once opted out, the provider cannot selectively bill Medicare.
Services that are not covered by Medicare
A provider who is opted out may also furnish services that are definitively excluded from Medicare coverage. Those excluded services are a different category. The private-contract requirements apply to services that are covered or potentially covered by Medicare. If a service is clearly not a Medicare-covered service, the opt-out and private-contract rules may not apply to it.
But the distinction between “covered,” “potentially covered,” and “definitely excluded” is not always obvious at the point of service. A practice that assumes certain services are excluded without verifying may be making a billing decision based on a coverage assumption that turns out to be wrong.
Mixed-provider groups
The mixed-status that does exist under Medicare is at the provider level within a group. One physician can be opted out while another remains enrolled. CMS allows that. But each provider’s status applies fully to that provider. The opted-out physician cannot bill Medicare for any covered services. The enrolled physician can.
This is different from the practice “opting out for some things.” It is two providers with different statuses, each following their own rules. For more on this, see One Provider in Our Group Opted Out of Medicare - How Do We Bill?.
What happens when the practice gets this wrong
Claims submitted by an opted-out provider
If an opted-out provider’s service is billed to Medicare, whether by habit, EHR automation, or staff confusion, the claim is improper. CMS may deny the claim, and the practice may face compliance consequences depending on the circumstances.
Private contracts missing for some patients
If the practice treats opt-out as selective and does not use private contracts with all Medicare beneficiaries seen by the opted-out provider, the practice is furnishing covered services without the required agreements. That can affect the validity of the opt-out and the provider’s ability to collect from the patient.
Patient confusion
If the practice tells some Medicare patients they need to pay privately and tells others their Medicare will be billed, but the same provider is seeing both groups, the patients will be confused. Medicare beneficiaries who hear from other patients that the practice “takes Medicare” may challenge their private-pay charges.
Audit exposure
A billing pattern that shows the same provider submitting Medicare claims for some patients while using private contracts for others is a pattern that can attract scrutiny. The opt-out is supposed to be comprehensive for that provider during the opt-out period.
What the billing workflow should handle
If a practice has decided to use Medicare opt-out as part of a concierge, DPC, or cash-pay strategy, the billing workflow should enforce the provider-level rule:
- Flag the opted-out provider. The EHR and billing system should clearly identify which providers are opted out. Claims should not be generated for Medicare-covered services furnished by opted-out providers.
- Require private contracts for all Medicare beneficiaries. If the opted-out provider sees a Medicare beneficiary for a covered service, a private contract must be in place. No exceptions for “regular” patients or patients who have been coming to the practice for years.
- Separate provider-level billing pathways. In a mixed-provider group, the billing pathway should follow the rendering provider’s status, not the patient’s preference or the scheduler’s assumption.
- Train staff on the rule. The front desk, schedulers, and billing team should understand that opt-out is not selective. Every Medicare patient seen by the opted-out provider follows the private-contract pathway.
What to check
- Does the practice understand that opt-out applies to the provider, not to selected patients or services?
- Is the EHR preventing Medicare claims for services furnished by the opted-out provider?
- Does every Medicare beneficiary seen by the opted-out provider have a valid private contract?
- Are staff treating opt-out as a per-visit or per-patient decision?
- Is the billing system generating claims for the opted-out provider out of habit or automation?
If any of those answers are unclear, the practice may be operating in a mixed-status trap: assuming selective opt-out is possible when CMS does not allow it. For the full opt-out operational guide, see Medicare Opt-Out for Private Practices: The Complete Guide. For the 2-year cycle and deadline management, see The Opt-Out Affidavit and 2-Year Cycle.
How Neobill can help
Neobill works with practices managing Medicare opt-out, concierge, DPC, and hybrid billing models. The free audit reviews provider status, EHR billing controls, private-contract workflow, and claim patterns to identify whether the practice’s billing matches its actual Medicare status.