April 21, 2026

Billing Insights

How to Switch Behavioral Health Billing Companies: A Checklist

Your aging report is climbing past 90 days. Claims you submitted in March still haven’t been touched. Your current biller stopped returning calls two weeks ago, and the last UR got approved because your clinical director worked it on a Saturday when no one at the billing company picked up. You’ve already decided you need to switch. The question is how to do it without torching six figures in open AR.

Switching behavioral health billing companies is one of the higher-risk operational moves a treatment center can make. Get it wrong and claims get lost in transit, timely filing windows close, and cash drops for a quarter. Get it right and you recover revenue you didn’t know was stuck.

Here’s the checklist operators use to make the move, plus the questions that separate a real RCM partner from a login and a prayer.

How do you know it’s time to switch billing companies?

Not every billing problem is a biller problem. Before interviewing replacements, rule out the usual suspects on your side: intake collecting bad insurance info, clinical documentation missing medical necessity language, or UR deadlines getting blown because no one owns the calendar.

That said, the following patterns are hard to blame on anything but the vendor:

Days in AR creeping past 60 with no explanation and no action plan.
Denials sitting unworked past the appeal window — especially 90837 downcodes and medical necessity denials on residential and PHP claims.
You can’t get a clean, current aging report on demand.
Your dedicated account rep has changed three times in a year, or you no longer have one.
UR approvals are coming in late, short, or not at all, and your census is taking the hit.
Payer credentialing gaps are being discovered by your billers, not prevented.

Three or more of those, and the math almost always favors switching.

TL;DR: What does a clean billing company transition look like?

Don’t terminate first. Sign with the new biller, build the transition plan, then give notice — in that order.
Protect the open AR. Decide in writing who works claims with dates of service before the cutover. That single clause saves the most revenue.
Export everything before access is revoked. Aging, payer contracts, fee schedules, EOBs, ERA enrollments, patient ledgers, clearinghouse history.
Re-point ERAs and EFTs early. Payer portal updates take 30–45 days. Start day one, not cutover day.
Interview on specifics, not pitches. Ask about 90837 denial rates, UR turnaround, and how they handle timely filing on inherited claims.

What should you do before giving notice to your current biller?

The worst transitions happen when an operator fires the old company in frustration on a Friday and starts looking for a new one on Monday. By then, logins get shut off, AR goes cold, and claims past timely filing start dying quietly.

Before you send a termination letter, lock these down:

1. Read your current contract

Look specifically for the termination clause, notice period (usually 30–90 days), data return obligations, and any fees for claims worked after termination. Some contracts entitle the outgoing biller to a percentage of collections on claims they submitted, even if your new biller does the follow-up work. Know that number before you negotiate with anyone.

2. Pull a full data export now

Don’t wait until the relationship is tense. Request:

Current AR aging by payer and by date of service
A list of every claim submitted in the last 12 months with status
All EOBs and ERAs
Patient demographic and insurance files
Your payer contract copies and fee schedules
Clearinghouse enrollment records
Credentialing files and CAQH attestation history

Industry observation: the data you can get while the relationship is cordial is often five times what you’ll extract after you give notice.

3. Map your payer mix and open authorizations

Every active patient has an authorization with a start date, end date, and level of care. If that spreadsheet doesn’t already live in your EMR, build it before cutover. Dropped auths during transition are where census revenue leaks.

What questions should you ask a new behavioral health billing company?

Every RCM vendor’s sales deck says the same three things: experienced team, technology-driven, dedicated support. None of that is diligence. Ask questions that force specifics.

On billing performance

What’s your average days in AR for residential, PHP, and IOP clients?
How do you handle 90837 downcodes to 90834? What’s your appeal success rate?
Walk me through your denial workflow. Who touches a denial on day one, and what’s the turnaround to appeal?
How do you handle single case agreements and out-of-network negotiations?

On utilization review

Do you do concurrent UR in-house, or subcontract it?
What’s your average turnaround from clinical handoff to payer submission?
How do you handle peer-to-peers? Does your UR team coordinate them or does that fall back on my medical director?

If the answer to UR questions is vague, that’s a real warning sign. A strong utilization review process is the difference between a full census and a discharge-heavy month.

On the transition itself

Who works the open AR from the previous biller, and how is that scoped?
What’s your onboarding timeline — when does the first clean claim go out under you?
How do you handle claims that were denied before you took over but are still within appeal window?
What reporting will I get in the first 30, 60, and 90 days?

On people and accountability

Who is my named point of contact and what’s their direct line?
How many accounts does that person carry?
What happens when they’re out — who picks up?

A real answer sounds like “Maria is your account manager, she carries 8 facilities, her backup is Jon, here are both their cells.” A bad answer is “you’ll have access to our support team.”

How do you protect open AR during a billing transition?

This is where most money is lost, and most of it is preventable with one well-written paragraph in your transition plan.

Decide — in writing, signed by both billers if possible — who owns claims by date of service. The cleanest split looks like this:

Outgoing biller continues to work claims with dates of service before the cutover date for 60–90 days, on a reduced percentage or flat fee.
New biller owns everything from the cutover date forward, plus any claim the outgoing biller has not touched in 30 days.
Appeals on pre-cutover denials go to whichever party has the bandwidth and documentation, agreed case by case.

If the outgoing relationship is too far gone for that arrangement, plan for the new biller to inherit everything and price it accordingly. Expect a temporary dip in collections in months two and three — that’s normal, not a red flag, as long as the aging report starts compressing by month four.

What does the first 90 days with a new biller actually look like?

A realistic timeline for a mid-sized residential and PHP operation:

Days 1–15

Data migration. EMR integration or file feeds established. Payer portal access transferred or new logins created. ERA and EFT re-enrollment submitted to every payer — this alone is a 30–45 day process with some Medicaid MCOs, so starting day one matters. Credentialing and payer enrollment gaps get identified and flagged.

Days 16–45

First clean claims go out under the new biller. Initial aging cleanup on inherited AR begins. You should be getting weekly reports by week three, not monthly. Any authorization gaps from the transition are closed.

Days 46–90

Denial rates stabilize, AR days start trending down on post-cutover claims, and recovery on aged AR shows up in cash. If by day 90 your new biller can’t show you a side-by-side of inherited aging vs. current aging, that’s a conversation to have immediately.

What are the most common billing transition mistakes?

Giving notice before signing a new contract. Now you’re negotiating from weakness with every vendor who finds out.
Assuming the old biller will hand over data cleanly. They might. Don’t bet AR on it.
Not updating ERAs and EFTs fast enough. Payments keep flowing to the old biller’s bank account or clearinghouse, and clawing them back is painful.
Letting authorizations lapse during the handoff. The new UR team needs the active auth list on day one, not day fifteen.
Signing a long contract with the new biller to get a discount. A 90-day out clause is worth more than a 10% rate cut.

Next step

If you’re evaluating a switch and want a straight answer on what your transition would look like — including how the open AR gets handled and what the first 90 days should produce — schedule a 20-minute call. No deck, no pressure. Just the specifics.

Frequently Asked Questions

How long does it take to switch behavioral health billing companies?

Plan on 60–90 days from signing with a new biller to a fully stable state. The first clean claims usually go out within the first 2–3 weeks, but ERA and EFT re-enrollments with payers often take 30–45 days, and inherited AR cleanup runs through the first 90 days.

Who works my open AR when I switch billers?

That should be decided in writing before you give notice. The cleanest arrangement is the outgoing biller continues working pre-cutover claims for 60–90 days while the new biller handles everything from the cutover date forward. If the outgoing relationship is too strained, the new biller inherits all AR and prices accordingly.

What data do I need to export from my current billing company?

At minimum: current AR aging by payer, 12 months of claim history with statuses, all EOBs and ERAs, patient demographic and insurance files, payer contracts and fee schedules, clearinghouse enrollment records, and credentialing and CAQH files. Pull this while the relationship is still cordial.

Will my collections drop during the transition?

Usually yes, temporarily — most commonly in months two and three as old claims age out and new claims are still moving through first-payer cycles. A competent new biller should show aging compression and improving collections by month four.

Should I give notice to my current biller before signing a new one?

No. Sign the new contract, build the transition plan, then give notice. Terminating first leaves you negotiating from weakness and at risk of losing access to data and portals before you’re ready.

What’s the single most important question to ask a new behavioral health biller?

Ask them to walk through their denial workflow in specifics — who touches a denial on day one, what the turnaround is to appeal, and what their success rate looks like on common behavioral health denials like 90837 downcodes and medical necessity denials on residential. Vague answers here predict vague performance.

Not sure where your billing is leaking?

Global AHS will audit your last 6 months of billing for free. We pull denials, aged AR, timely filing misses, undercoded services, and underpaid claims, then hand you a written report showing the exact gaps and what they’re costing you. No commitment, no sales pressure — just your numbers, laid bare.

Request your free 6-month audit →