How long do I have to request reconsideration of a Medicare enrollment denial?

The regulation gives 60 days from receipt of the notice, and presumes receipt 5 days after the date on the letter (42 CFR 498.22(b)(3)). CMS's Program Integrity Manual therefore requires the request to be received within 65 calendar days of the letter date.

Can I add documents after I file the reconsideration request?

Send everything with the request. Under 42 CFR 405.803, evidence not submitted before the contractor decides generally cannot be introduced at higher levels, unless an administrative law judge finds good cause under 498.56(e).

How long does a reconsideration decision take?

CMS's Program Integrity Manual tells the hearing officer to issue a written decision within 90 calendar days of receiving an accepted request. The regulation itself does not set a decision deadline for this level.

Can I just reapply instead of appealing?

Under 42 CFR 424.530(b), you may reapply after your appeal rights lapse, or after you are told an appealed denial was upheld. If the denial was for false or misleading information, CMS can bar reapplication for up to 10 years.

Medicare Enrollment Denials and Reconsideration

When a Medicare Administrative Contractor (MAC) denies your enrollment application, you are not dealing with a closed panel. Original Medicare has no network to fill. A denial means CMS or its contractor decided that you, your application, or someone connected to your practice does not meet an enrollment requirement in 42 CFR 424.530. That is a regulatory decision, and the regulations give you a written way to challenge it.

The first step is a reconsideration. It is the level that matters most, because it is usually the last point where you can put new documents in front of a reviewer. Below is how the process works as the regulation and CMS's Program Integrity Manual describe it as of October 2026.

What can CMS deny enrollment for?

Section 424.530(a) lists the grounds. The ones we see most in physician and practitioner files are:

Noncompliance with an enrollment requirement, such as a practice location that does not qualify or a missing license for the state you are enrolling in (424.530(a)(1)).
An excluded or debarred person anywhere in the practice: an owner, managing employee, medical director, supervising physician, or other staff furnishing services payable by a federal program (424.530(a)(2)).
A felony conviction within the preceding 10 years that CMS determines is detrimental to the program (424.530(a)(3)).
False or misleading information on the application (424.530(a)(4)).
An on-site review showing the location is not operational (424.530(a)(5)).
A suspended or revoked DEA registration or state prescribing authority (424.530(a)(11)).
Termination or suspension from a state Medicaid program, or a license revoked or suspended in another state (424.530(a)(14)).

The basis matters because it decides which remedies are open to you. Only a denial under (a)(1), noncompliance, can be answered with a corrective action plan. Every denial can be answered with a reconsideration request.

How does the denial notice reach you, and what must it say?

Under 42 CFR 405.800(a), the contractor notifies you by certified mail. The notice must give "the reason for the denial in sufficient detail to allow the provider or supplier to understand the nature of its deficiencies," your right to appeal under part 498, and the address for the written appeal. If the letter you received does not cite a specific paragraph of 424.530, that is worth noting in your request.

The denial becomes effective within 30 days of the initial notification (424.530(e)). While a denial is under appeal, Medicare does not pay. If the denial is later overturned, 424.545(a)(2) lets you resubmit unpaid claims for services furnished during the overturned period.

When is the reconsideration request due?

The regulation is 42 CFR 498.22(b)(3). The request must be filed "within 60 days from receipt of the notice of initial determination," and "the date of receipt will be presumed to be 5 days after the date on the notice unless there is a showing that it was, in fact, received earlier or later."

CMS's Program Integrity Manual (Chapter 10, section 10.6.18) turns that into a single count from the letter date: a reconsideration request "must be received by the MAC or CMS within 65 calendar days of the date of the initial determination." The date CMS or the MAC receives your request is the filing date, so mailing it on day 64 is a risk. If day 65 falls on a weekend or federal holiday, the manual treats a request received the next business day as timely.

If you miss the window, 498.22(d) lets you ask CMS for an extension, and CMS "will extend the time for filing a request for reconsideration if the affected party shows good cause." The manual describes good cause narrowly: circumstances outside your control, such as records destroyed by fire. Do not plan around it.

What has to be in the request?

Section 498.22(c) says the request "must state the issues, or the findings of fact with which the affected party disagrees, and the reasons for disagreement." The manual adds that it must be a letter, signed by the individual physician or practitioner, an authorized or delegated official, or a properly appointed representative under 42 CFR 498.10.

Two signature details trip people up:

If you are a reassigned individual in a group, the group's authorized official cannot sign your request without a signed statement from you authorizing it, according to the manual.
A non-attorney representative needs a written notice of appointment signed by you or your authorized official, filed with CMS or the MAC (498.10(b)).

Why is the reconsideration your one chance to add evidence?

Two rules make the first level decisive. Under 42 CFR 405.803(c), you "must, at the time of their request, submit all evidence that they want to be considered." Under 405.803(e), if you fail to submit the evidence before the contractor decides, you are "precluded from introducing new evidence at higher levels of the appeals process." The manual repeats this: the reconsideration is "the party's only opportunity to submit information during the administrative appeals process" unless an administrative law judge finds good cause under 498.56(e).

In practice, that means building the full record now: licenses with primary-source printouts, proof that the location was operational on the visit date (lease, signage photos, staffing schedules, appointment logs), proof that a flagged person has left the practice, court records showing a conviction is outside the 10-year window or was not a felony, and a plain explanation tying each document to the specific ground cited.

Who decides, and how long does it take?

Section 405.803(b) assigns the reconsideration to a CMS Regional Office or "a contractor hearing officer not involved in the initial determination." The manual sends certain categories straight to CMS's Provider Enrollment and Oversight Group, including denials based on exclusion, felony, debt, prescribing authority, other-program termination and patient harm.

The manual tells the hearing officer to issue a written decision "within 90 calendar days of the date of receipt of the accepted reconsideration request." Under 498.25, an adverse reconsidered determination must give its reasons, specify the requirements you fail to meet, and tell you about your right to a hearing. That decision is binding unless you take the next step, which we cover in Medicare enrollment appeals beyond reconsideration.

Is there a faster fix than reconsideration?

Sometimes. Three shortcuts exist in the regulation itself:

Corrective action plan. For an (a)(1) noncompliance denial, a CAP lets you fix the deficiency instead of arguing that the contractor was wrong. The manual sets a 35-calendar-day window from the date of the determination. See Medicare revocations and corrective action plans for how a CAP is built.
Ending a business relationship. If the denial rests on the adverse history of an owner, managing employee, medical director, supervising physician or similar person, 424.530(c) allows reversal if you terminate the relationship and submit proof "within 30 days of the denial notification."
A new application. Under 424.530(b), you can reapply once appeal rights lapse (if you did not appeal) or after you are notified the denial was upheld. That route is closed for up to 10 years if the denial was for false or misleading information and CMS imposes a reapplication bar under 424.530(f).

How is this different from a plan saying no?

A Medicare Advantage plan or commercial insurer that turns you down is usually exercising its right to limit its network, as we explain in credentialing denial or network denial. A Medicare enrollment denial is the opposite: there is a legal standard, a record, an independent reviewer and a defined appeal ladder. It is also upstream of everything else. Medicare Advantage plans must check "eligibility for payment under Medicare" when they credential (42 CFR 422.204(b)(2)(i)), and many Medicaid and commercial applications ask about it, so an unresolved denial can surface in every later file.

For first-time enrollment mechanics in PECOS, our sister service White Glove Credentialing explains how to enroll in Medicare through PECOS.

What do we do, and what stays with you?

We are not a law firm and we do not represent providers. In a Network Rejection Review ($249, credited toward a dispute) we read your denial letter, identify the exact 424.530 ground, calculate the CAP and reconsideration dates from the letter date, and tell you which remedies fit. If you go ahead, a Payer Network Dispute ($799) covers preparing the reconsideration letter and organizing the evidence package. You review it, sign it and send it, and we track the 90-day decision window. If the facts involve a felony, an exclusion, or anything you may need to defend at a hearing, talk to a healthcare attorney before you file, because the record you build now is the record a judge will see. Prices are on our pricing page.