What Medical Billing Companies Actually Charge

Medical billing companies charge under one of three models: a percentage of collections, a flat monthly fee, or a per-claim fee — often with setup charges and add-on fees layered on top. No independent body publishes audited industry-average rates, so any “typical percentage” you read online is marketing. What you can control is knowing exactly what a quote covers.

Here’s an uncomfortable truth about this topic: almost every article answering “how much do medical billing companies charge” quotes a confident-sounding percentage range with no source behind it — usually written by a billing company. The Medical Group Management Association and other independent benchmarking bodies publish practice cost and A/R data to their members, but there is no audited public dataset of what outsourced billing vendors charge. So rather than inventing numbers, this post explains the three pricing structures, what genuinely moves quotes up or down, what’s usually inside versus outside the fee, and the questions that force any vendor’s real price into the open. That’s more useful than a made-up average anyway, because your quote will be built on your practice’s specifics — not an average.

The three pricing models

1. Percentage of collections

The vendor keeps an agreed percentage of the money it brings in. It’s the most common structure in outsourced billing because incentives are roughly aligned: the vendor earns nothing on claims that don’t get paid.

Three things to pin down before comparing percentage quotes:

• The base. A percentage of net collections (what’s actually collected after contractual adjustments) is a different number than a percentage of gross charges. Get the definition in writing.
• What counts as “collected by the vendor.” Some contracts take their percentage of copays your own front desk collected. That’s your staff’s work, not theirs.
• Compliance posture. The HHS Office of Inspector General’s Compliance Program Guidance for Third-Party Medical Billing Companies (Federal Register, December 18, 1998) states the OIG’s “longstanding concern that percentage billing arrangements may increase the risk of upcoding and similar abusive billing practices.” Percentage pricing is lawful and widespread, but a vendor on this model should be able to describe the auditing that keeps its coding honest.

There’s also a Medicare plumbing detail worth knowing: federal regulation (42 CFR 424.73 and 424.80) restricts when Medicare can pay a billing agent directly — among the conditions, the agent’s compensation may not be related to the dollar amount billed or collected. In practice this is why reputable percentage-fee companies have payers deposit into an account the practice controls, then invoice their fee, rather than touching the money first. If a vendor proposes receiving your Medicare payments into its own account under a percentage deal, walk away.

2. Flat monthly fee

One fixed price per month, typically scoped to a provider count and an assumed claim volume. Budgeting is easy and there’s no incentive to inflate charges — but there’s also no built-in incentive to chase the last difficult denial, because the vendor earns the same either way. Ask what volume band the fee assumes, what triggers a re-price, and how denial follow-through is measured and reported.

3. Per-claim fee

A set price for each claim submitted. Cost tracks volume cleanly, which suits low-volume or highly seasonal practices. The trap is the definition of “a claim”: ask whether corrected claims, resubmissions after a denial, and secondary/tertiary payer claims each ring the register again. A per-claim vendor paid for every resubmission has a perverse incentive to be sloppy the first time — so ask how first-pass quality is monitored.

What actually drives your quote up or down

1. Specialty complexity. Specialties with heavy documentation requirements, frequent prior authorization, or intricate payer edits cost more to bill than straightforward E/M-driven practices.
2. Claim volume and average claim value. High volume with small balances is labor-intensive relative to the dollars collected; vendors price for that.
3. Payer mix. A book of business heavy in payers with high denial and rework rates costs more to work. For context on how much rework exists in the system: KFF’s January 2025 analysis found HealthCare.gov insurers denied 19% of in-network claims in 2023.
4. The state of your current A/R. If you’re handing over months of aged, unworked receivables, expect either a separate cleanup project fee or a higher ongoing rate.
5. Scope. “Billing” can mean claim submission only, or it can include coding review, denial appeals, patient statements, payment posting, credentialing support, and reporting. Wider scope, higher price — and that’s fair, as long as the scope is written down.
6. How clean your front end is. Practices with strong eligibility verification and accurate demographics generate fewer denials, and the 2024 CAQH Index (published February 2025) put the medical industry’s remaining savings opportunity from automating such administrative transactions at $18.4 billion a year. Some vendors will price sharper for a practice whose front desk sends them clean work.

Usually included vs. usually extra

Typically inside the base fee: claim scrubbing and submission, payment posting, denial follow-up, standard monthly reporting.

Frequently billed separately — always ask: implementation/setup, patient statement printing and postage, patient phone support, old A/R cleanup projects, credentialing and payer enrollment, custom or ad-hoc reporting, software or clearinghouse pass-through fees, interface fees to connect to your EHR, and data-export or early-termination charges.

None of these add-ons is inherently unfair. What’s unfair is discovering them on invoice three.

Seven questions that expose hidden fees

1. Exactly what number is your fee calculated on, and can I see the definition in contract language?
2. What is the all-in first-year cost for a practice my size, including setup — in writing?
3. Do patient statements, postage, and patient calls cost extra?
4. Does working my existing aged A/R cost extra, and at what rate?
5. Are clearinghouse, software, or interface fees passed through to me?
6. If I add a provider or a location, what changes?
7. What does it cost me to leave — data export, tail claims, termination notice?

The bottom line

The right question isn’t “what’s the going rate?” — it’s “what does this specific quote cover, calculated on what base, with which add-ons?” Two quotes that look a point apart can be thousands of dollars apart once statements, setup, and A/R cleanup are counted. AMS Solutions has priced billing engagements for practices since 1992, and we’ll put every element of a quote in writing before you sign — the fee base, the scope, and the exit terms. If you’re gathering numbers this quarter, ask us to quote our medical billing services with the seven questions above; we’ll answer all of them on the first call.