Usually not, and the exceptions depend entirely on the payer. This is one of the most expensive misunderstandings in practice finance, because by the time it surfaces the money is often already gone.
Generally you cannot bill a payer before enrolment is finalised. Some payers backdate the effective date to when the application was received, which makes earlier work billable retroactively. Many do not. Confirm backdating in writing per payer before scheduling patients.
A claim submitted for a provider who is not yet enrolled with that payer will generally deny. Not pend — deny.
Whether you can recover that revenue later depends on one thing: whether the payer backdates the effective date to the application receipt date. Some do. Many do not, and will only pay from the date the enrolment was finalised.
The expensive version of this problem is a new provider who sees patients for three months during credentialing. If the payers backdate, those claims are submitted retroactively and paid. If they do not, that is three months of clinical work that cannot be billed to anyone — and you generally cannot bill the patient instead for an out-of-network situation they were not told about.
That last question catches people. If timely filing runs from date of service and credentialing took four months, some held claims may already be outside the window by the time you can submit them.
Where the payer backdates, provide the care, hold the claims, and submit once the effective date is confirmed. Track them carefully against timely filing deadlines — held claims are easy to forget and the deadline does not care.
Where the payer's rules genuinely allow it and the supervision requirements are actually met. This has specific documentation and arrangement requirements, varies by payer and state, and is not a workaround to apply loosely. Check the particular payer's policy rather than assuming the general case.
The least satisfying and often the correct answer. Schedule the new provider with payers where enrolment is complete and delay the rest. Less revenue now, but no unbillable work.
Start credentialing 120 days before the intended start date rather than 60, and track each application individually. The timeline guide has the working-backwards schedule.
And treat re-credentialing with the same care. A lapsed enrolment on an existing provider creates exactly this problem with no warning at all, because nobody is expecting it.
Send us the details and we will tell you which are still billable, which payers will backdate, and which are at risk of timing out. Worth checking before the filing window closes.
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