Opted Out of Medicare? What It Takes to Enroll
By George Ruan • October 7, 2026
Last reviewed: October 7, 2026.
If you have an active Medicare opt-out, you cannot bill Medicare through an ordinary enrollment until the opt-out ends, and joining a group does not get around it. Ending it means either early termination of a first opt-out period or a timely cancellation before a period renews, both handled through your Medicare Administrative Contractor (MAC). Filing a PECOS application does not cancel the opt-out.
Sections
Why a group enrollment does not work around it
Opt-out is an election made by the individual practitioner, and it covers every Medicare-covered service that person furnishes, regardless of which NPI a claim would carry. CMS’s Program Integrity Manual, chapter 10 also states that organizations cannot opt out. The regulations bar Medicare payment to the opted-out practitioner or to any entity they reassign benefits to, which closes the route of billing through a group’s Type 2 NPI.
We hear the mirror-image question too: “Do I also have to opt out with my Type 2?” No. The individual files the affidavit; a practice’s Type 2 NPI simply stays unenrolled, with nothing to file on the group side.
Where this comes up in practice
Adding a clinician to a Medicare group. Before we add anyone to a group’s Medicare reassignment, we check the CMS opt-out list along with their enrollment, specialty, and jurisdiction. An opted-out clinician cannot be rostered until the opt-out is resolved.
Other payers ask too. Some commercial contracting checklists ask whether a clinician has a Medicare opt-out affidavit on file; one we completed this year states that clinicians in the opt-out program cannot hold that plan’s contract. Answer from the actual record, not from the absence of a Medicare ID.
A client’s card mentions Medicare. Check what the plan actually is before worrying. A commercial employer plan whose card mentions Medicare is not affected by your opt-out; Original Medicare coverage is.
Confirm the opt-out record first
Ask your MAC for the practitioner’s opt-out effective date, the current period’s end date, and whether this is the first period or a renewal. Those facts decide which route exists. Gather the original affidavit, any renewal notice, every MAC the affidavit was filed with, and any earlier cancellation request with proof of receipt. If the practitioner does not recognize an opt-out on file, ask the MAC to resolve it before planning anything else.
Early termination versus end-of-period cancellation
First opt-out period: Noridian’s early-termination guidance describes a 90-day window measured from the opt-out effective date, and it excludes renewals. The Program Integrity Manual, section 10.6.12(E) adds steps involving beneficiary notification and refunds where applicable. CMS’s summary page instead describes 90 days from submitting the initial affidavit. Because those two phrasings can produce different deadlines, ask the MAC which date controls as soon as possible.
Renewal: Noridian’s cancellation guidance says the MAC must receive a signed cancellation at least 30 calendar days before the period expires and returns requests received more than 90 days before expiration. A letter sent months early does not reserve the cancellation.
Then coordinate the enrollment
Get the available route, required documents, signer, and dates from the MAC in writing.
Handle any beneficiary-notice or refund obligations, with qualified advice where needed.
Submit the termination or cancellation as instructed and keep proof of delivery and the MAC’s decision.
File the CMS-855I and confirm the effective date the MAC will accept. The manual ties the enrollment effective date to when the opt-out ends.
Do not tell Medicare patients you are in network based on the date a request was mailed. If a request comes back as late, read its reconsideration instructions right away. This is administrative information, not legal advice; disputed dates, private-contract questions, or refunds warrant direct MAC guidance and, when appropriate, counsel.
For how opt-out differs from non-participating and unenrolled status, read participating, non-participating, and unenrolled Medicare status.
Frequently Asked Questions
Can I bill under my group’s NPI instead?
No. The opt-out follows you as the practitioner. Medicare will not pay the group for your services either, because payment to anyone you reassign benefits to is barred too.
My opt-out already renewed. Is early termination still possible?
The 90-day early-termination route applies only to a first opt-out period. After a renewal, ask the MAC about cancelling before the current period ends and about any reconsideration rights in your notice.
Does my practice have to opt out separately?
No. Organizations cannot opt out. Only the individual practitioner files; the practice’s Type 2 NPI simply remains unenrolled with Medicare.
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