In House vs Outsourced Medical Billing: How to Decide

Choosing in house vs outsourced medical billing comes down to four things: what each costs per month for your claim volume, how much control and reporting you keep, who handles the paper, and what the contract says when things go wrong. Outsourcing trades payroll for a fee and less direct control. In-house billing keeps control but carries staffing risk.

In house vs outsourced medical billing costs compared

The cost of in-house billing is mostly salaries, benefits, software and supplies, and it stays roughly fixed whether collections rise or fall. The cost of outsourced billing is usually a fee, often a percentage of collections, so it moves with revenue. Compare them per month and per claim on your own numbers, not on a vendor's sample.

The worksheet below is a fictional five-provider practice. Every figure is an example made up for this post, not a market rate. Replace each line with your own payroll, software invoices and collection totals.

Cost comparison worksheet (fictional example)

Assumptions for the example: five providers, $3,000,000 a year in net collections, 36,000 claims a year, and a billing company charging 6% of collections.

On these made-up numbers, outsourcing costs $62,000 a year less. Three more calculations decide whether that holds.

The break-even fee. Take the in-house total, subtract the costs the practice keeps when it outsources, and divide by collections. Here that is ($312,000 − $70,000) ÷ $3,000,000, or about 8.1%. A fee above that would make outsourcing more expensive on this worksheet.

Growth. A percentage fee grows with revenue. If the example practice adds a sixth provider and collections reach $3,600,000, the fee rises to $216,000. In-house staff might absorb the extra claims, or might need another hire, so model both.

Collection performance. Cost per claim means little if collections change. If the outside company collected 3% less than the in-house team, the example practice would lose $90,000 a year in revenue, more than the $62,000 it saved. If it collected 3% more, the case for outsourcing gets stronger. You cannot know this in advance, which is why the contract section below asks for reports that would show it.

The fee base also needs a definition. "Percentage of collections" can include or exclude patient payments taken at the front desk, payments on claims filed before the contract started, and refunds. A practice that pays a percentage on copays its own staff collected is paying for work it did itself.

Control and visibility with an outsourced billing company

With an outsourced billing company, a practice usually keeps ownership of its data but gives up day-to-day sight of the work: which claims were sent, which denials were worked, and which balances were adjusted off. What you keep depends on whose system the claims live in and what reports the contract requires.

There are two common setups. In one, the billing company works inside the practice's own practice management system, so the practice can run any report at any time. In the other, the company uses its own system and sends the practice summary reports. The first keeps visibility. The second makes the practice depend on what the company chooses to show, and makes leaving harder because the history sits in someone else's system.

The reports worth requiring are the same ones an in-house team should produce. The guide to an RCM KPI dashboard and its formulas lists them: clean claim rate, denial rate, aging by payer, days in AR, cash collected and denial write-offs, each with a fixed definition. Asking the company to report them with the same definitions every month lets you compare its work with your own past performance.

Write-offs and adjustments deserve the closest watch. A billing company paid on collections has a reason to work claims that are likely to pay and less reason to chase small or difficult balances. The guide to how to reduce days in AR without writing off revenue explains why a falling days-in-AR figure can hide written-off money. Ask for a monthly list of adjustments by reason code and approver.

Payment flow is part of control too. Under 42 CFR 424.73 on payment to a billing agent, Medicare may pay an agent who furnishes billing and collection services only under conditions that include that the agent's compensation is not related in any way to the dollar amounts billed or collected, and that payment is always made in the name of the provider. That rule governs direct payment to the agent, not billing contracts in general. Under it, a company paid a percentage of collections does not qualify to receive Medicare payments directly as the practice's agent, so the contract should say which account in the practice's name receives them.

How does paper volume change the in house vs outsourced billing decision?

Paper volume changes the in house vs outsourced billing decision because someone must read every scanned EOB, paper claim and mailed denial and key it in. In-house, that is your staff's time. Outsourced, the practice usually still receives the mail and must scan and send it, and the company keys it at a pace you do not control.

Paper creates three practical questions:

1. Who opens the mail? Payers send paper EOBs, checks and correspondence to the address on the claim, which is often the practice. A billing company cannot post a payment it has not seen. Agree on how often mail is scanned and sent, and who checks that nothing was missed.
2. Who keys it, and how fast? A paper EOB that waits a week to be posted leaves that claim open in AR for a week. Ask an outside company how long it takes from receiving a scan to posting it, and ask your own team the same question.
3. Who keeps the images? Scanned EOBs and denial letters are the evidence for appeals and audits. The contract should say where they are stored and that the practice can retrieve them.

How many people paper actually needs is worked out in the guide to staffing a billing team for paper volume. A practice that keys a lot of paper in house can sometimes keep billing in house by reducing the typing instead of the team. Schema Care reads scanned EOBs, claim forms and billing statements into fields, scores each one, and holds the uncertain ones for a person to check against the page; its current plans and page limits include one listed for several locations or a billing service.

What should an outsourced medical billing contract include?

An outsourced medical billing contract should define the fee base exactly, require the reports you need to judge performance, state who owns the data and how you get it back, include a business associate agreement, and say what happens to claims in progress when the contract ends. Vague wording on any of those terms is hard to fix after signing.

A practical checklist of terms to look for:

• Fee base. Which payments count as collections, whether front-desk patient payments are excluded, and whether payments on claims filed before the start date count.
• Scope. Charge entry, coding, claim submission, posting, denial follow-up, appeals, patient statements and patient phone calls: which are included, which cost extra, and which stay with the practice.
• Reports. The list of monthly reports, with definitions, and access to the practice management system if the company uses it.
• Data ownership and exit. The practice owns its data. On termination, the company returns claim history, payment history, open AR and document images in a usable form, within a stated number of days.
• Run-out. Who works claims already submitted when the contract ends, for how long, and at what fee.
• Credit balances and refunds. How overpayments are identified, reported and returned. The OIG compliance program guidance for third-party medical billing companies says the billing company should maintain a complete audit trail of all credit balances.
• Filing limits and errors. Who bears the loss when a claim misses a payer's filing deadline or is coded wrongly through the company's error.
• Business associate agreement. Under the HIPAA definition in 45 CFR 160.103, a business associate includes a person who handles protected health information on a covered entity's behalf for functions including claims processing and billing. A billing company fits that definition. What the agreement should cover belongs to the HIPAA and PHI category.

The OIG guidance also notes a concern worth knowing before you sign a percentage contract. A footnote states that "the OIG has a longstanding concern that percentage billing arrangements may increase the risk of upcoding and similar abusive billing practices." That is a reason to require coding audits and adjustment reports in the contract, whatever the fee model. This post is not legal advice; have a lawyer review the agreement.

When outsourcing medical billing is the wrong choice

Outsourcing medical billing is the wrong choice when the practice already collects well with a stable team, when its billing depends on specialty knowledge an outside company lacks, or when the fee would exceed the break-even rate on your own worksheet. It is also wrong when the real problem is upstream, at registration or charge entry.

Signs that in-house billing clearly wins:

• Your numbers are already good and steady. If your dashboard shows a stable denial rate and days in AR trending the right way, an outside company has to beat your own team, not a blank slate.
• The work needs specialty judgment. Practices with unusual procedures, many authorizations or frequent appeals need billers who know the clinic's providers and payers well. That knowledge takes time to build and leaves with the contract.
• The fee is above break-even. If the worksheet's break-even fee is lower than the quoted percentage, outsourcing costs more on paper before any change in collections.
• The errors start at the front desk. Wrong member IDs, missing authorizations and late charge entry cause denials that no billing company can prevent, because those steps usually stay with the practice. Outsourcing moves the rework, not the cause.
• You need fast answers. Staff who can walk down the hall to ask about a claim resolve patient questions faster than a ticket to an outside team.

A middle path exists too. Some practices keep posting and front-end work in house and send only denials or old AR to an outside company, or bring in temporary help for a backlog. The worksheet works for these mixes as well: list which lines move, and recalculate.

Whichever you choose, set a review date. Run the same KPIs for six months, compare them with the months before the change, and revisit the decision with numbers rather than impressions.