Moving From an In-House Biller to a Billing Company: How to Do It Without Losing Revenue

Medical Billing · September 22, 2026 · 5 min read

Moving From an In-House Biller to a Billing Company: How to Do It Without Losing Revenue

How do you move from an in-house biller to a billing company?

To move from an in-house biller to a billing company without losing revenue: (1) get an independent look at your numbers (clean-claim rate, days in A/R, and denials), because an in-house biller rarely reports them; (2) choose a billing company that will manage the transition and take over your open A/R; (3) decide how to handle your current biller, since many practices redeploy them to the front desk or patient work; (4) set a cutover date and transfer system access, clearinghouse, and payer logins; (5) run monthly reporting from day one so you can see the difference. A managed transition takes a few weeks with no gap in cash flow.

For a lot of practices, billing has always been one person. She knows the payers, she knows the providers, and she’s been doing it for years. And when you ask how things are going, the answer is always the same: “Everything’s fine.”

Maybe it is. But the practices that come to us from an in-house setup almost never switched because the biller was bad. They switched because nobody could actually see what was happening, and by the time they could, they’d been losing money for months.

This is a different decision than moving from one billing company to another. (If that’s your situation, read how to switch medical billing companies instead.) Here’s how to think it through.

Why a single biller can’t keep up anymore

Twenty years ago, one competent person could run a practice’s billing. That’s no longer true, and it isn’t a criticism of the person. Billing today is electronic, automated, and constantly changing: claim edits, remittance files, payer portals, prior authorizations, credentialing and revalidation deadlines, and coding rules that shift every year. Carriers are actively auditing office-visit levels and taking money back. Keeping up with all of it is a full-time job for a team of certified people, not a side task for one employee who also answers the phone.

The result isn’t usually a disaster. It’s a slow leak: denials that never get appealed, charges that never get captured, visits billed at a lower level than the documentation supports, and aging claims that quietly time out.

The visibility problem

The bigger issue is reporting. An in-house biller almost never produces monthly financial reporting: clean-claim rate, days in A/R, denial rate, net collections. Not because they’re hiding anything, but because producing it isn’t part of the job and the tools to do it aren’t there.

So the provider finds out collections have slipped when they sit down with their accountant at year-end. That’s six months to a year too late to fix anything.

If you can’t get those three or four numbers every month, you don’t have billing oversight. You have trust. Trust is fine, but it isn’t a reporting system.

Signs it’s time to make the change

  • You can’t get a clean-claim rate, days in A/R, or net collection rate without a special request
  • Collections are flat while patient volume is up
  • Denials are written off rather than appealed, or you don’t know which it is
  • You or another provider are doing billing work at night or on weekends
  • Your biller is the only person who knows how anything works, and is nearing retirement, or could leave tomorrow
  • A payer has audited you, or you’re worried one will

Two or more of these, and it’s worth getting an outside look. A free billing analysis takes an hour of your time and will tell you exactly where you stand.

Step 1: Get an independent read on your numbers

Before you change anything, have an outside firm review your actual collections, denials, and A/R against what you should be collecting for your specialty and volume. This does two things: it tells you whether there’s a real problem, and it gives you a baseline to measure the new arrangement against. If there’s no gap, keep what you have.

Step 2: Decide what happens with your current biller

This is the part that keeps providers from making the change, and it deserves a straight answer. You have three options:

  1. Redeploy. Front desk, eligibility verification, patient balances, referrals, scheduling: the practice still needs those done, and the person already knows your patients and providers. This is the most common outcome.
  2. Time it. If your biller is close to retirement or has told you they’re leaving, plan the transition around that date so no one is displaced.
  3. Let them go. Sometimes it’s the right call. If so, treat it like any other staffing change: notice, documentation, and a clear handoff plan for passwords, logins, and open work.

A good billing company has been through this many times and will help you plan the timing.

Step 3: Choose a partner who manages the transition

Ask specifically: Who takes over my open A/R? What’s the cutover date? How do you get access to my practice-management system, clearinghouse, and payer portals? What reporting will I see, and when? If the answers are vague, keep looking.

You’ll also want to know who is doing the work. Ask whether the billers and coders are certified (CPC and CPB), whether they’ve billed your specialty and your payers before, and whether they work in the U.S.

Step 4: Protect your open A/R and set a cutover date

Claims your in-house biller has already submitted still need to be worked to completion. Decide explicitly whether your biller finishes them before the cutover or the billing company takes them over, and get it in writing. Then set a date: claims for dates of service from that day forward go to the new team.

Step 5: Move access, then start reporting on day one

Practice-management system logins, clearinghouse accounts, payer portals, EFT/ERA setup, and credentialing and enrollment records all move on a written timeline. From the first month, you should be seeing the reporting you never had: clean-claim rate, days in A/R, denials by payer and reason, and net collections.

What it looks like when it works

One of our clients is a physician assistant who runs her own practice. Before MMSM, she saw patients all day and did her own billing at night, often until midnight, and the practice was collecting a fraction of what it should have. We took over the billing, she went home when the last patient left, and her monthly collections grew several times over. The headache is gone, and she can see her numbers every month.

That’s the outcome to aim for. Not “cheaper billing,” but a practice that collects what it earns, and a provider who can see it.

Wondering whether that’s you? Request a free, no-obligation billing analysis or call (517) 485-0001.


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Answers

Frequently asked questions

Straight answers to the questions providers ask us most. Don't see yours? Just ask.

Is it cheaper to keep a biller in-house or use a billing company?
Once you count salary, benefits, billing software, clearinghouse fees, training, and coverage for vacations and turnover, a billing company is usually the lower true cost, and its fee scales with what it collects. The bigger difference is revenue: a single biller working alone typically leaves denials unworked and claims underbilled, and that lost revenue is almost always larger than the fee difference.
My biller says everything is fine. How would I know if it isn't?
Ask for three numbers every month: your clean-claim rate, your days in accounts receivable, and your net collection rate. If you can’t get them, or they only surface at tax time, you don’t have visibility into your own revenue. A free billing analysis from an outside firm will tell you quickly whether money is being left on the table.
What happens to my current biller if I outsource?
That’s the hardest part of this decision, and it’s a real one. Many practices keep the person and redeploy them to the front desk, eligibility, patient balances, or scheduling, because those jobs still need doing and the person already knows the practice. Others make the change when the biller retires or leaves. A good billing company will help you plan the timing either way.
How long does the transition take?
Most practices are fully transitioned within a few weeks. The billing company should set a clear cutover date, take over or finish your open A/R, and move system, clearinghouse, and payer access on a written timeline.
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