How long does it take to switch medical billing companies?

Plan on 60 to 90 days from decision to full cutover. The notice period in your existing contract is usually the longest element, followed by payer EDI, ERA and EFT enrollments, which take weeks and should start during the notice period. The parallel run itself is two to four weeks.

Who works the old A/R when we switch billers?

Whoever your written agreement says, and if it says nothing, in practice nobody. The workable options are the outgoing biller running it out for a defined period with reporting, the new biller taking it as a separately scoped cleanup project, or your own staff. Get a claim-level aging report at notice and again at cutover.

Will switching billing companies interrupt our cash flow?

It does not have to. Cash dips when claims go unsubmitted during the gap, when EFT and ERA are redirected late, or when the old A/R is abandoned. A date-of-service cutover rule, enrollments started early, and a parallel run in which deposits are reconciled to remittances weekly prevent all three.

Do we need to re-credential with payers when we change billing companies?

Usually not. Credentialing and network participation belong to the provider and the practice, not the biller. What changes is who is enrolled to submit claims and receive remittances under your identifiers, and who administers your CAQH, PECOS and payer portal accounts. Confirm no payer has the old biller's address on file.

Can a billing company keep our data or hold it until we pay?

The records of your patients and claims are the practice's, and the Business Associate Agreement should spell out return or destruction at termination. Fee disputes do happen, which is one more reason to prefer a biller who works inside a practice management system you own, so there is nothing to hold.

Practice management

How to switch medical billing companies without losing revenue

By DyBilling editorial teamSeptember 10, 20267 min read

Switching billers is a cash-flow event. Done badly, claims sit unsubmitted for weeks, the old company stops working your accounts receivable the day you give notice, and remittances land somewhere nobody is reconciling. Done in the right order, collections barely register the change. Here is the sequence, from reading your contract to the parallel run, and the red flags to watch along the way.

Start with the contract you already signed

The first document to read is not a proposal from a new vendor; it is the agreement with your current one. Notice periods of 30, 60 or 90 days are all common, and many agreements renew automatically for a full term unless notice lands inside a window before the anniversary. The clause that matters most is what happens to claims already in flight. Some agreements oblige the biller to keep working the run-out A/R for a defined period at the contracted rate; others end all work on the termination date and charge separately for anything after. Look for these terms in particular.

Notice period, how notice must be delivered, and the auto-renewal window.
Termination for convenience versus for cause, and any early-exit fee.
Run-out obligations on existing A/R, with rate and duration.
Data ownership, return format and timing, and who owns the practice management system and clearinghouse account.
Business Associate Agreement termination terms and what the biller must do with your PHI.

Who owns the old A/R and for how long

Every dollar billed before the cutover has to be worked by someone, and the incentive fades quickly for a company that has been given notice. Three models work. The old biller runs out the A/R for a fixed period at the existing rate, with weekly aging and denial reports to the practice. The new biller takes the backlog as a separately scoped cleanup project, usually at a distinct rate because old A/R is more work per dollar than fresh claims. Or the practice keeps a small amount in-house. What does not work is leaving it unassigned, which is the default when nobody writes it down.

Whichever model you choose, get a claim-level aging report by payer on the day you give notice and again on the cutover date. Those two snapshots are how you hold the outgoing company to its run-out obligation and how the new one knows what it inherited. Payer filing limits and appeal windows do not pause for a vendor change, so the oldest buckets get triaged first by whoever holds them.

Data export and practice management system access

If you own the practice management system and the biller works inside it, this step is simple: the new company gets user accounts scoped to billing, the old accounts are disabled on the cutover date, and the audit log shows who did what. Nothing migrates because nothing needs to. If the biller owns the system, the export is the hardest part of the switch and should start the day notice is given. You need demographics and insurance, the full charge, payment and adjustment history, claim status history, remittance files or images, denial and appeal notes, fee schedules, payer contracts and credit balances. Ask for a data dictionary and test a sample before the old system goes dark. DyBilling works inside the client's existing practice management system for exactly this reason: the practice keeps its own data, and if the relationship ends, nothing has to be extracted from anyone.

Clearinghouse, ERA and EFT enrollment changes

The clearinghouse question is whether the account and submitter ID are in your name or the biller's. If yours, the new biller is simply added as a user. If the biller's, every payer that requires EDI enrollment, which includes Medicare, most Medicaid programs and many Blue plans, has to be re-enrolled under the new submitter, and those enrollments take weeks. Start them during the notice period, not after it.

Electronic remittance advice (the 835) and electronic funds transfer are enrolled separately with each payer under the HIPAA administrative simplification standards CMS administers. EFT should always deposit to a bank account the practice controls; if payments have been flowing to an account the biller manages, redirecting them is the single most important step in the transition. ERA routing has to move to the new clearinghouse at the same time, or payments arrive with nothing to post them from. Expect some payers to fall back to paper checks and EOBs during the gap, and assign someone to open the mail.

Payer portals, credentialing and CAQH ownership

List every login the outgoing biller holds on your behalf: multi-payer portals such as Availity, individual payer portals, the Medicare enrollment system PECOS, the NPPES registry where your NPI records live, state Medicaid portals, and the CAQH ProView profiles your providers attest through. The practice or a provider should be the administrator on every one, with the biller as a delegated user. If the biller is the administrator, transfer that role before their access is revoked; recovering an orphaned portal account can take longer than the rest of the switch.

Credentialing files belong to the provider. Confirm CAQH profiles are current and the practice holds the login, that PECOS authorized officials and surrogates are your people, and that no payer has the biller's address on file as the correspondence or pay-to address. A recredentialing request mailed to a former vendor is a network termination waiting to happen.

How to switch medical billing companies with a parallel run

A parallel run is two to four weeks in which the new biller works alongside the outgoing process before taking over. It is the only way to compare the two on your own claims rather than a sales deck. Set a date-of-service cutover rule in writing, usually that encounters on or after a given date belong to the new biller and everything before is run-out, so no claim is billed twice or by nobody. Then measure both sides on the same figures.

Charges captured against charges billed, so nothing falls between the EHR and the claim.
Days from date of service to submission, by provider.
Clearinghouse rejection rate and reasons, which show whether enrollments are complete.
Payments posted against bank deposits, reconciled weekly, so the EFT and ERA redirect is proven before the old channel closes.
Unbilled encounters and claims on hold, each with a named owner.

Reporting to demand from day one, and the red flags

Ask for the reporting before the contract is signed and treat the first month of it as part of the evaluation: weekly charges, submissions, rejections and denials by reason code, payments posted, aging by payer and bucket, unbilled encounters and credit balances, plus a monthly review with a named person who knows your payer mix. If a vendor cannot show a sample of that reporting for an existing client, they do not produce it. DyBilling starts with a free A/R review of your aging and a sample of denials, runs a two-to-four-week parallel period, signs a BAA, assigns a named account manager, and after the initial term is month to month with 30 days notice. The warning signs on either side of a switch are consistent.

The current biller will not provide a claim-level export, or charges heavily for one.
The clearinghouse account or EFT deposits are in the biller's name and they resist moving them.
A vendor offers to finish your old A/R at no charge but will not commit to reporting on it.
A multi-year initial term with automatic renewal and a large early-exit fee.
No parallel run offered, or pressure to cut over on a date that suits the vendor rather than your enrollments.
Reluctance to sign a Business Associate Agreement, or no questions about your payer mix, fee schedules or denial history during the sales process.

Questions this article gets asked

How long does it take to switch medical billing companies?: Plan on 60 to 90 days from decision to full cutover. The notice period in your existing contract is usually the longest element, followed by payer EDI, ERA and EFT enrollments, which take weeks and should start during the notice period. The parallel run itself is two to four weeks.
Who works the old A/R when we switch billers?: Whoever your written agreement says, and if it says nothing, in practice nobody. The workable options are the outgoing biller running it out for a defined period with reporting, the new biller taking it as a separately scoped cleanup project, or your own staff. Get a claim-level aging report at notice and again at cutover.
Will switching billing companies interrupt our cash flow?: It does not have to. Cash dips when claims go unsubmitted during the gap, when EFT and ERA are redirected late, or when the old A/R is abandoned. A date-of-service cutover rule, enrollments started early, and a parallel run in which deposits are reconciled to remittances weekly prevent all three.
Do we need to re-credential with payers when we change billing companies?: Usually not. Credentialing and network participation belong to the provider and the practice, not the biller. What changes is who is enrolled to submit claims and receive remittances under your identifiers, and who administers your CAQH, PECOS and payer portal accounts. Confirm no payer has the old biller's address on file.
Can a billing company keep our data or hold it until we pay?: The records of your patients and claims are the practice's, and the Business Associate Agreement should spell out return or destruction at termination. Fee disputes do happen, which is one more reason to prefer a biller who works inside a practice management system you own, so there is nothing to hold.

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