Opt-out attaches to you, not to your practice
Summary
Medicare opt-out attaches to a clinician's individual NPI, not to a practice or a place of work, so opting out for a private practice reaches every setting that clinician works in, hospital shifts included. The affidavit identifies one NPI and a clinician only ever holds one. The hospital job can continue; what cannot continue is the hospital billing Medicare for services that clinician personally furnishes.
By Gale Editorial · Updated 2026-09-02. Every figure cited to a dated source. How we write.
Can you opt out for the private practice and stay enrolled for the hospital?
No. Medicare opt-out is an election made by a person, and the affidavit that carries it must identify that person by national provider identifier 1Ref 1Centers for Medicare & Medicaid Services (Code of Federal Regulations) (2026).42 CFR § 405.420 — Beneficiary's agreement with the physician or practitioner not to bill Medicare.That the opt-out affidavit must identify the physician or practitioner by NPI, and that during the opt-out period the clinician agrees not to bill Medicare and not to permit any entity acting on their behalf to submit a claim for services they personally furnish.. An individual is eligible for only one Type 1 NPI, ever 2Ref 2Noridian Healthcare Solutions, LLC (Medicare Administrative Contractor for CMS) (2026).National Provider Identifier (NPI) - JE Part B.That an individual clinician is eligible for only one Type 1 NPI, so no second identifier exists for a second job or role, and that every claim submitted to Medicare must carry an NPI or it is unprocessable.. There is no second identifier to enroll the hospital half of the week under, so the election reaches every setting the clinician works in.
The affidavit does more than promise that you will not bill Medicare. It also commits you not to permit any entity acting on your behalf to submit a claim to Medicare for a service you personally furnish during the opt-out period 1Ref 1Centers for Medicare & Medicaid Services (Code of Federal Regulations) (2026).42 CFR § 405.420 — Beneficiary's agreement with the physician or practitioner not to bill Medicare.That the opt-out affidavit must identify the physician or practitioner by NPI, and that during the opt-out period the clinician agrees not to bill Medicare and not to permit any entity acting on their behalf to submit a claim for services they personally furnish.. On an employed shift, the entity submitting the claim is the employer, and the service is one you personally furnished.
But nothing in the rule stops you from working the shift. It stops the claim that normally follows it.
That changes what you are asking an employer for. You are asking whether the hospital can bill Medicare for the professional work you personally do there while your affidavit is in force, which is a question about claim routing rather than about your schedule.
How your hospital shifts reach Medicare
Through your NPI, by way of a form your employer filed. An individual practitioner assigns Medicare billing rights to an enrolled organization or group practice using form CMS-855R, the reassignment of benefits 3Ref 3Noridian Healthcare Solutions, LLC (Medicare Administrative Contractor for CMS) (2026).Medicare Provider Enrollment Systems: NPPES, I&A, and PECOS.That form CMS-855R is the reassignment of benefits by which an individual practitioner assigns Medicare billing rights to an enrolled organization or group practice, which is how an employer bills Medicare for an employed clinician's work.. Every claim submitted to Medicare must carry an NPI or it is unprocessable 2Ref 2Noridian Healthcare Solutions, LLC (Medicare Administrative Contractor for CMS) (2026).National Provider Identifier (NPI) - JE Part B.That an individual clinician is eligible for only one Type 1 NPI, so no second identifier exists for a second job or role, and that every claim submitted to Medicare must carry an NPI or it is unprocessable.. The hospital's claim for your Tuesday shift is therefore a claim submitted on your behalf, under your number.
Many employed clinicians sign that form once at onboarding and never see it again. Ask the enrollment office for a copy before you decide anything, since it names which organization bills Medicare for your work and under which identifier.
Forming a professional entity for the private practice does not hand you a second individual number. NPI-1 and NPI-2 is the pairing to look up if that idea is still in play, and the short version is that an organizational number identifies the organization while an individual is eligible for one Type 1 NPI 2Ref 2Noridian Healthcare Solutions, LLC (Medicare Administrative Contractor for CMS) (2026).National Provider Identifier (NPI) - JE Part B.That an individual clinician is eligible for only one Type 1 NPI, so no second identifier exists for a second job or role, and that every claim submitted to Medicare must carry an NPI or it is unprocessable.. The affidavit is filed against that individual one 1Ref 1Centers for Medicare & Medicaid Services (Code of Federal Regulations) (2026).42 CFR § 405.420 — Beneficiary's agreement with the physician or practitioner not to bill Medicare.That the opt-out affidavit must identify the physician or practitioner by NPI, and that during the opt-out period the clinician agrees not to bill Medicare and not to permit any entity acting on their behalf to submit a claim for services they personally furnish..
The three routes, and what each one costs
Three, and only one of them keeps Medicare money flowing through both settings. You can stay enrolled and leave the reassignment alone. You can opt out, which reaches both settings at once and ends the hospital's ability to bill Medicare for services you personally furnish 1Ref 1Centers for Medicare & Medicaid Services (Code of Federal Regulations) (2026).42 CFR § 405.420 — Beneficiary's agreement with the physician or practitioner not to bill Medicare.That the opt-out affidavit must identify the physician or practitioner by NPI, and that during the opt-out period the clinician agrees not to bill Medicare and not to permit any entity acting on their behalf to submit a claim for services they personally furnish.. Or you can keep the job and move your hospital duties to work that generates no Medicare claim under your number.
| Route | The hospital side | The private practice side | What gets filed |
|---|---|---|---|
| Stay enrolled | Unchanged; the reassignment already on file keeps the claims flowing 3Ref 3Noridian Healthcare Solutions, LLC (Medicare Administrative Contractor for CMS) (2026).Medicare Provider Enrollment Systems: NPPES, I&A, and PECOS.That form CMS-855R is the reassignment of benefits by which an individual practitioner assigns Medicare billing rights to an enrolled organization or group practice, which is how an employer bills Medicare for an employed clinician's work. | Unchanged by this election | Nothing new |
| Opt out | The hospital cannot bill Medicare for services you personally furnish 1Ref 1Centers for Medicare & Medicaid Services (Code of Federal Regulations) (2026).42 CFR § 405.420 — Beneficiary's agreement with the physician or practitioner not to bill Medicare.That the opt-out affidavit must identify the physician or practitioner by NPI, and that during the opt-out period the clinician agrees not to bill Medicare and not to permit any entity acting on their behalf to submit a claim for services they personally furnish. | A private contract signed with each Medicare beneficiary before each non-emergency service 4Ref 4Noridian Healthcare Solutions, LLC (Medicare Administrative Contractor for CMS) (2026).Opt Out of Medicare - JE Part B.That each opt-out period lasts two years and renews automatically unless cancelled on time, and that a private contract must be signed with each Medicare beneficiary before non-emergency services are furnished. | The affidavit, filed within 10 days of your first private contract 5Ref 5Centers for Medicare & Medicaid Services (Code of Federal Regulations) (2015).§ 405.410 Conditions for properly opting-out of Medicare..That the affidavit must be filed within 10 days after the clinician signs their first private contract with a Medicare beneficiary, that the two-year opt-out period begins on the date the affidavit is signed, and that a participating physician instead opts out at the start of a calendar quarter, with the affidavit filed at least 30 days before it begins. |
| Opt out and reshape the role | Only duties that produce no Medicare claim under your NPI | Same as opting out | The affidavit, plus whatever the employer requires in writing |
The first route is the default, and plenty of clinicians build private-pay work without touching it. The comparison that decides it is participation, non-par, opt-out, and that belongs on its own page. Whichever you choose, the rule itself is narrow: while an affidavit is in force, the hospital cannot bill Medicare for the services you personally furnish there 1Ref 1Centers for Medicare & Medicaid Services (Code of Federal Regulations) (2026).42 CFR § 405.420 — Beneficiary's agreement with the physician or practitioner not to bill Medicare.That the opt-out affidavit must identify the physician or practitioner by NPI, and that during the opt-out period the clinician agrees not to bill Medicare and not to permit any entity acting on their behalf to submit a claim for services they personally furnish..
The third route is the one people underestimate. Duties that generate no professional Medicare claim under your NPI can mean administrative time, teaching, or committee work rather than billed patient care. Whether such a role exists at your organization is a contract question, and the federal opt-out rules do not answer it.
What a private contract does to the money
It takes Medicare out of the transaction on both sides. Medicare's fee schedule and limiting charge place no cap on what you may charge under a private contract 6Ref 6Centers for Medicare & Medicaid Services (Code of Federal Regulations) (2026).42 CFR § 405.415 — Terms of a private contract.That Medicare fee-schedule and limiting-charge caps do not apply to what may be charged under a private contract, that the beneficiary waives the right to submit a Medicare claim for the service, and that Medicare pays nothing toward it.. In the same document the beneficiary gives up the right to submit a Medicare claim for that service, and Medicare pays nothing toward it 6Ref 6Centers for Medicare & Medicaid Services (Code of Federal Regulations) (2026).42 CFR § 405.415 — Terms of a private contract.That Medicare fee-schedule and limiting-charge caps do not apply to what may be charged under a private contract, that the beneficiary waives the right to submit a Medicare claim for the service, and that Medicare pays nothing toward it.. The fee is yours to set and the patient's to pay in full.
The contract is per patient and it runs ahead of the service. A private contract has to be signed with each Medicare beneficiary before you furnish a non-emergency service to that person 4Ref 4Noridian Healthcare Solutions, LLC (Medicare Administrative Contractor for CMS) (2026).Opt Out of Medicare - JE Part B.That each opt-out period lasts two years and renews automatically unless cancelled on time, and that a private contract must be signed with each Medicare beneficiary before non-emergency services are furnished.. That ordering makes intake the control point: the contract belongs in the new-patient packet, signed at or before the first non-emergency visit.
But the cost lands on the patient, and it lands in full. Someone who has paid into Medicare for decades is being asked to pay you outside the program and to give up their own claim for that visit 6Ref 6Centers for Medicare & Medicaid Services (Code of Federal Regulations) (2026).42 CFR § 405.415 — Terms of a private contract.That Medicare fee-schedule and limiting-charge caps do not apply to what may be charged under a private contract, that the beneficiary waives the right to submit a Medicare claim for the service, and that Medicare pays nothing toward it.. Pricing a practice around that is a business decision worth running with your accountant before the affidavit is signed, because the affidavit commits you to a two-year period from the day it is signed 5Ref 5Centers for Medicare & Medicaid Services (Code of Federal Regulations) (2015).§ 405.410 Conditions for properly opting-out of Medicare..That the affidavit must be filed within 10 days after the clinician signs their first private contract with a Medicare beneficiary, that the two-year opt-out period begins on the date the affidavit is signed, and that a participating physician instead opts out at the start of a calendar quarter, with the affidavit filed at least 30 days before it begins..
The clock: ten days, two years, and automatic renewal
Two dates and a renewal. The affidavit has to be filed within 10 days after you sign your first private contract with a Medicare beneficiary, and the two-year opt-out period starts on the date the affidavit itself is signed 5Ref 5Centers for Medicare & Medicaid Services (Code of Federal Regulations) (2015).§ 405.410 Conditions for properly opting-out of Medicare..That the affidavit must be filed within 10 days after the clinician signs their first private contract with a Medicare beneficiary, that the two-year opt-out period begins on the date the affidavit is signed, and that a participating physician instead opts out at the start of a calendar quarter, with the affidavit filed at least 30 days before it begins.. Each period then renews automatically for another two years unless it is cancelled on time 4Ref 4Noridian Healthcare Solutions, LLC (Medicare Administrative Contractor for CMS) (2026).Opt Out of Medicare - JE Part B.That each opt-out period lasts two years and renews automatically unless cancelled on time, and that a private contract must be signed with each Medicare beneficiary before non-emergency services are furnished.. The renewal needs no action to happen and does need action to stop.
That is the sequence for a clinician who is not a participating physician. A participating physician opts out at the start of a calendar quarter instead, with the affidavit filed at least 30 days before that quarter begins 5Ref 5Centers for Medicare & Medicaid Services (Code of Federal Regulations) (2015).§ 405.410 Conditions for properly opting-out of Medicare..That the affidavit must be filed within 10 days after the clinician signs their first private contract with a Medicare beneficiary, that the two-year opt-out period begins on the date the affidavit is signed, and that a participating physician instead opts out at the start of a calendar quarter, with the affidavit filed at least 30 days before it begins..
Both dates belong in the calendar the day the first contract is signed. The filing window is short enough that a practice that starts seeing Medicare beneficiaries before the paperwork is ready will miss it.
Anyone opting out mid-career with a Medicare-heavy panel has a sequencing problem stacked on top of this one. The order that matters here is narrow: the first private contract you sign starts the filing window, and the affidavit you sign starts the two years 5Ref 5Centers for Medicare & Medicaid Services (Code of Federal Regulations) (2015).§ 405.410 Conditions for properly opting-out of Medicare..That the affidavit must be filed within 10 days after the clinician signs their first private contract with a Medicare beneficiary, that the two-year opt-out period begins on the date the affidavit is signed, and that a participating physician instead opts out at the start of a calendar quarter, with the affidavit filed at least 30 days before it begins..
Emergency and urgent care is the only Medicare channel left
The carve-out is narrower than a moonlighting schedule. Medicare's definitions in this subpart tie emergency care services to what is necessary to prevent death or serious impairment of health, with urgent care services defined alongside them 7Ref 7Centers for Medicare & Medicaid Services (Code of Federal Regulations) (2026).42 CFR § 405.400 — Definitions.The subpart's definitions of emergency care services, tied to what is necessary to prevent death or serious impairment of health, and of urgent care services alongside them, establishing how narrow the exception is.. For services that qualify, an opted-out clinician bills Medicare directly and collects no more than the Medicare limiting charge, or, for a non-physician practitioner, the deductible and coinsurance 8Ref 8Centers for Medicare & Medicaid Services (Code of Federal Regulations) (2015).§ 405.440 Emergency and urgent care services..That an opted-out clinician furnishing emergency or urgent care to a beneficiary with no private contract bills Medicare directly for it without signing a private contract, and may collect no more than the Medicare limiting charge, or for a non-physician practitioner the deductible and coinsurance.. No private contract is signed for those services.
The exception is defined by the service, not by the department it happens in. An opted-out clinician furnishing emergency or urgent care to a beneficiary who has no private contract in place bills Medicare for that encounter 8Ref 8Centers for Medicare & Medicaid Services (Code of Federal Regulations) (2015).§ 405.440 Emergency and urgent care services..That an opted-out clinician furnishing emergency or urgent care to a beneficiary with no private contract bills Medicare directly for it without signing a private contract, and may collect no more than the Medicare limiting charge, or for a non-physician practitioner the deductible and coinsurance.. A scheduled outpatient session does not become an emergency service because a hospital owns the building it happens in.
The charge cap rides along with the exception. Whatever a private contract lets you charge in your own office has no bearing on what you may collect for an emergency service billed to Medicare 8Ref 8Centers for Medicare & Medicaid Services (Code of Federal Regulations) (2015).§ 405.440 Emergency and urgent care services..That an opted-out clinician furnishing emergency or urgent care to a beneficiary with no private contract bills Medicare directly for it without signing a private contract, and may collect no more than the Medicare limiting charge, or for a non-physician practitioner the deductible and coinsurance..
What to get in writing before the affidavit is signed
Three answers, all from other people, before anything is signed. Ask the employer's enrollment office which claims it submits under your NPI, and get a copy of the reassignment on file 3Ref 3Noridian Healthcare Solutions, LLC (Medicare Administrative Contractor for CMS) (2026).Medicare Provider Enrollment Systems: NPPES, I&A, and PECOS.That form CMS-855R is the reassignment of benefits by which an individual practitioner assigns Medicare billing rights to an enrolled organization or group practice, which is how an employer bills Medicare for an employed clinician's work.. Ask compliance or credentialing how the organization handles an employed clinician who is opted out elsewhere. Then ask a health care attorney what your employment agreement and the medical staff bylaws actually say about outside practice.
Counsel earns its fee at four specific triggers:
- Your employment agreement or the medical staff bylaws address outside practice, exclusivity, or Medicare participation
- The enrollment office cannot say which of your services the organization bills, or says it depends on the service
- You are already inside an opt-out period and the offer requires Medicare-billed work
- The role includes emergency department coverage, where the definition and the charge cap both apply 8Ref 8Centers for Medicare & Medicaid Services (Code of Federal Regulations) (2015).§ 405.440 Emergency and urgent care services..That an opted-out clinician furnishing emergency or urgent care to a beneficiary with no private contract bills Medicare directly for it without signing a private contract, and may collect no more than the Medicare limiting charge, or for a non-physician practitioner the deductible and coinsurance.
Federal opt-out rules say nothing about employment contracts, so the employer's own documents govern that half and an attorney reads them. What the rules settle is the identifier: one Type 1 NPI per clinician 2Ref 2Noridian Healthcare Solutions, LLC (Medicare Administrative Contractor for CMS) (2026).National Provider Identifier (NPI) - JE Part B.That an individual clinician is eligible for only one Type 1 NPI, so no second identifier exists for a second job or role, and that every claim submitted to Medicare must carry an NPI or it is unprocessable., one affidavit attached to it 1Ref 1Centers for Medicare & Medicaid Services (Code of Federal Regulations) (2026).42 CFR § 405.420 — Beneficiary's agreement with the physician or practitioner not to bill Medicare.That the opt-out affidavit must identify the physician or practitioner by NPI, and that during the opt-out period the clinician agrees not to bill Medicare and not to permit any entity acting on their behalf to submit a claim for services they personally furnish., and no second number to split the week between.
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- 1.Centers for Medicare & Medicaid Services (Code of Federal Regulations) (2026). 42 CFR § 405.420 — Beneficiary's agreement with the physician or practitioner not to bill Medicare. Electronic Code of Federal Regulations (eCFR), National Archives / GPO — Title 42, Part 405, Subpart D. linkThat the opt-out affidavit must identify the physician or practitioner by NPI, and that during the opt-out period the clinician agrees not to bill Medicare and not to permit any entity acting on their behalf to submit a claim for services they personally furnish.
- 2.Noridian Healthcare Solutions, LLC (Medicare Administrative Contractor for CMS) (2026). National Provider Identifier (NPI) - JE Part B. Noridian Medicare Portal, Jurisdiction E Part B. link ✓That an individual clinician is eligible for only one Type 1 NPI, so no second identifier exists for a second job or role, and that every claim submitted to Medicare must carry an NPI or it is unprocessable.
- 3.Noridian Healthcare Solutions, LLC (Medicare Administrative Contractor for CMS) (2026). Medicare Provider Enrollment Systems: NPPES, I&A, and PECOS. Noridian Medicare Portal, Jurisdiction E Part B. link ✓That form CMS-855R is the reassignment of benefits by which an individual practitioner assigns Medicare billing rights to an enrolled organization or group practice, which is how an employer bills Medicare for an employed clinician's work.
- 4.Noridian Healthcare Solutions, LLC (Medicare Administrative Contractor for CMS) (2026). Opt Out of Medicare - JE Part B. Noridian Medicare Portal, Jurisdiction E Part B (CA, HI, NV, American Samoa, Guam, Northern Mariana Islands). link ✓That each opt-out period lasts two years and renews automatically unless cancelled on time, and that a private contract must be signed with each Medicare beneficiary before non-emergency services are furnished.
- 5.Centers for Medicare & Medicaid Services (Code of Federal Regulations) (2015). § 405.410 Conditions for properly opting-out of Medicare.. Electronic Code of Federal Regulations (eCFR), Title 42, Part 405, Subpart D. link ✓That the affidavit must be filed within 10 days after the clinician signs their first private contract with a Medicare beneficiary, that the two-year opt-out period begins on the date the affidavit is signed, and that a participating physician instead opts out at the start of a calendar quarter, with the affidavit filed at least 30 days before it begins.
- 6.Centers for Medicare & Medicaid Services (Code of Federal Regulations) (2026). 42 CFR § 405.415 — Terms of a private contract. Electronic Code of Federal Regulations (eCFR), National Archives / GPO — Title 42, Part 405, Subpart D. link ✓That Medicare fee-schedule and limiting-charge caps do not apply to what may be charged under a private contract, that the beneficiary waives the right to submit a Medicare claim for the service, and that Medicare pays nothing toward it.
- 7.Centers for Medicare & Medicaid Services (Code of Federal Regulations) (2026). 42 CFR § 405.400 — Definitions. Electronic Code of Federal Regulations (eCFR), National Archives / GPO — Title 42, Part 405, Subpart D (Opt-Out of Medicare and Private Contracts). link ✓The subpart's definitions of emergency care services, tied to what is necessary to prevent death or serious impairment of health, and of urgent care services alongside them, establishing how narrow the exception is.
- 8.Centers for Medicare & Medicaid Services (Code of Federal Regulations) (2015). § 405.440 Emergency and urgent care services.. Electronic Code of Federal Regulations (eCFR), Title 42, Part 405, Subpart D. link ✓That an opted-out clinician furnishing emergency or urgent care to a beneficiary with no private contract bills Medicare directly for it without signing a private contract, and may collect no more than the Medicare limiting charge, or for a non-physician practitioner the deductible and coinsurance.
https://www.gale.care/for-providers/se-optout-w2-shift-npi-conflict · 8 sources. Competitor details are cited to dated public sources and maintained as they change; figures are estimates, not commitments. Synthetic demonstration.