A physician group logs into its Medicare Administrative Contractor's portal and finds that claims are rejecting outright, not denied for coverage or coding reasons, because the group's billing number is no longer active. In most cases the number was deactivated under 42 C.F.R. Section 424.540, commonly for going six consecutive calendar months without submitting a Medicare claim or for missing a revalidation deadline. Deactivation is not revocation, and the two carry very different consequences. Confusing them, or missing the specific steps CMS requires to reactivate, can leave a practice unable to bill Medicare for services it is currently rendering, which is exactly the problem it is trying to solve.
Deactivation Is Not Revocation
Deactivation, governed by 42 C.F.R. Section 424.540, is an administrative status. It does not affect the practice's provider agreement or its conditions of participation, and it carries no waiting period before the number can be made active again. Revocation, governed by 42 C.F.R. Section 424.535, is a punitive action, imposed for reasons such as a pattern of noncompliant billing or a disqualifying conviction, and it carries a reenrollment bar of one to ten years under Section 424.535(c) before the practice can even apply to re-enroll. A practice that receives a deactivation notice should confirm, in writing with its Medicare Administrative Contractor, which action was actually taken. Treating a deactivation as though it were a revocation, or the reverse, leads to the wrong response and wastes the narrow window available to fix the problem.
Why Billing Numbers Get Deactivated
The most common trigger is simple inactivity: no Medicare claims submitted for six consecutive calendar months. Beyond that, CMS may deactivate a billing number when a provider fails to report a change to its enrollment information within the required timeframe, fails to furnish complete or accurate information within 90 days of a CMS request, is found out of compliance with an enrollment requirement, or is operating out of a practice location CMS determines is invalid. None of these triggers require any finding of fraud or billing misconduct, which is precisely why deactivation is treated as correctable rather than punitive.
Every week a billing number sits deactivated is a week of services the practice cannot invoice, so the reactivation application should be treated as urgent from the moment the notice is discovered, not queued behind routine administrative work.
Reactivating Billing Privileges and the Claims Gap
To reactivate, a deactivated provider must recertify that its enrollment information on file with Medicare is correct, furnish any missing information, and demonstrate compliance with all applicable enrollment requirements. CMS may require this through a simple update or may require a complete CMS-855 reactivation application, depending on the circumstances. What reactivation does not do is close the billing gap: Medicare generally will not pay for services furnished while the number was deactivated, subject to certain limited retrospective billing rules, so the period between deactivation and an approved reactivation can represent real, unrecoverable revenue. Practices should also expect that reactivated billing does not reset the compliance slate. Claims submitted before and after the gap remain subject to the same review, including a Recovery Audit Contractor review, and a normal additional documentation request (ADR). A pattern of errors identified in that review can be pursued through extrapolation across a broader universe of claims and collected through recoupment.
Why Early Legal Counsel Is Critical
It is critical that providers promptly retain experienced healthcare defense counsel upon discovering a Medicare billing number deactivation, particularly where claims are being rejected or the deactivation may be miscategorized as a revocation. Early legal intervention can protect the provider's rights, ensure the reactivation application is complete and timely, address any gap in billable claims, and preserve relevant defenses. Delaying legal representation can significantly affect the outcome of a matter and expose the provider to unnecessary risk.
How Health Law Alliance Can Help
Health Law Alliance has represented 2,500+ clients across 25+ years of Medicare enrollment and audit defense work, including physician groups working through a billing number deactivation, a disputed revocation, and the claims exposure that follows either one. Our Medicare audit defense attorneys confirm which action CMS actually took, prepare and submit the reactivation application, and address any resulting audit or recoupment exposure once billing resumes. Contact Health Law Alliance for a free, confidential consultation.
