In-House vs. Outsourced Medical Billing: The Real Cost for a Multi-Location Group

By Dr. Zain Vally  |  September 2026  |  Practice Administration

Most comparisons between in-house and outsourced billing are written for solo practitioners weighing one hire against one vendor. That math does not apply to a group practice running two to six locations. The cost structure changes at every layer: redundancy requirements, supervision overhead, software licensing, and the revenue that disappears when a biller quits mid-cycle.

This is the breakdown I walk through with multi-location groups evaluating their billing operations. Every number below is sourced, and the model is built per location so you can plug in your own site count.

The Per-Location Cost of In-House Billing

A single-location practice can sometimes get away with one full-time biller handling charge entry, claim submission, payment posting, denial follow-up, and patient collections. A multi-site group cannot. Each location generates its own volume, its own payer mix, and its own front-desk eligibility issues.

Here is what one location's billing operation actually costs when you account for every line item.

1. Biller Salary

The Bureau of Labor Statistics Occupational Employment and Wage Statistics survey (May 2025) reports a national median annual wage of $56,790 for medical records specialists (SOC 29-2072). That is the 50th percentile. In metro areas with higher costs of living, the median runs $62,000 to $68,000.

A group practice with multiple locations typically needs billers with denial management experience, not entry-level coders. Experienced billers command 75th-percentile wages, which BLS places above $65,000 nationally.

2. Benefits and Employer Taxes

The BLS Employer Costs for Employee Compensation report (March 2025) puts total benefits at 31.2% of wages for private-industry workers in professional and related services. Applied to the $56,790 median, that is $17,718 in benefits costs per biller per year.

Combined salary and benefits per biller: $74,508 annually at the national median. For an experienced hire in a metro market, that figure crosses $85,000.

3. Clearinghouse and Practice Management Software

Clearinghouse fees for electronic claims submission run $300 to $600 per provider per month, depending on volume and payer mix. A three-provider location pays $900 to $1,800 monthly. Annual cost: $10,800 to $21,600 per location.

Practice management system licensing adds another $300 to $700 per provider per month if the group is not already on an integrated EHR/PM platform. Groups already on an integrated system still pay for the billing module, which typically runs $150 to $400 per provider per month.

4. Turnover and Retraining

This is the cost most groups underestimate. A May 2026 MGMA poll found that 28% of medical groups reported higher-than-normal billing staff turnover over the previous 12 months. SHRM estimates the cost of replacing a mid-level employee at six to nine months of salary.

At the $56,790 median, that replacement cost is $28,395 to $42,593 per departure. Spread across a four-location group that loses one biller per year (a conservative assumption given 28% of groups reporting elevated turnover), that adds $7,099 to $10,648 per location per year.

5. Claims That Age Out During Transitions

When a biller leaves, claims in their queue stop moving. Denials go unworked, and follow-ups miss deadlines.

Revenue does not pause because the position is vacant.

From our own client data across multi-location groups, we have documented that 10.5% of billed charges can age past timely filing deadlines during staff transitions. For a location billing $1.2 million annually, that is $126,000 at risk every time a biller departs.

Not all of that is permanently lost. Some claims can be recovered with timely filing exception requests. But the recovery rate on aged-out claims averages 40% to 60% in our experience, meaning $50,400 to $75,600 per location is gone.

Total In-House Cost Per Location

*Low estimate assumes no turnover event in the given year. The high estimate assumes one departure with associated claim aging. Sources: BLS OEWS May 2025, BLS ECEC March 2025, SHRM 2024 benchmarking report, MGMA May 2026 poll, A-Z Medical Billing client data (2025).

For a four-location group, the in-house billing operation costs $369,628 to $772,512 per year. That range is wide because turnover is binary: in a good year with no departures, you pay the floor. In a year where two billers leave, the cost spikes.

What Outsourced Billing Costs at the Same Scale

A percentage-of-collections model ties your billing cost directly to revenue. When collections go up, the fee goes up; when volume drops, the fee drops with it.

There is no fixed headcount to carry through a seasonal lull or a provider's leave of absence.

Industry rates for full-service medical billing range from 4% to 10% of net collections, depending on specialty, volume, and scope of services. At A-Z, our rate starts at 4.9% of net collections.

Here is what that looks like applied to the same four-location group.

At $3 million in annual collections across four locations, a 4.9% outsourced billing fee is $147,000 per year. The in-house floor for those same four locations is $369,628. That is a $222,628 difference before accounting for any turnover events.

What the Salary Comparison Misses

Supervision and Management Overhead

In-house billers need a revenue cycle manager or a practice administrator spending 15 to 25 hours per week on billing oversight: reviewing aging reports, managing payer follow-up queues, handling escalated denials, and running month-end reconciliation. That time has a cost even if it comes from an existing administrator's workload, because it displaces other operational work.

An outsourced billing partner absorbs that management function. The practice administrator's time redirects to patient experience, provider scheduling, and growth planning.

Coverage Gaps

A single biller per location means zero redundancy. Vacation, sick days, FMLA leave, and resignation all create gaps where claims are not being worked. For a multi-location group, cross-training a backup biller at each site is theoretically possible but rarely executed well.

An outsourced team distributes the work across multiple specialists. No single absence creates a coverage gap. Denial follow-up continues on the same timeline regardless of PTO schedules.

Denial Rework Capacity

In-house billers handling charge entry, posting, and patient calls have limited time for denial follow-up. MGMA's 2025 data book reports that practices with dedicated denial management workflows recover 12% to 18% more on initially denied claims compared to practices where denial follow-up is one of many responsibilities.

A billing partner with a dedicated denial management team (like our denial management service) can run those workflows at a scale that one biller per location cannot match.

When In-House Billing Still Makes Sense

This analysis is not a blanket argument against in-house billing. For some groups, keeping billing internal is the right call.

High-volume single-specialty groups with 10+ providers at one location can justify a billing department with built-in redundancy. The fixed cost per claim drops when volume is concentrated, and the management overhead is spread across a larger revenue base.

Groups with an established, tenured billing team that has been in place for five or more years face a different turnover risk profile. The SHRM replacement cost applies at departure, and a stable team reduces that probability. If your billers have been with you for years, the cost model above overstates your risk.

Practices with complex payer contracts that require deep institutional knowledge (certain academic medical centers, FQHCs with wrap payments, multi-state Medicaid groups) may need billing staff who understand the specific contract terms and carve-outs. Outsourced partners can handle this, but the ramp-up period is longer.

The Question to Ask Your CFO

The decision is not "is outsourcing cheaper." It usually is, and the table above shows by how much. The real question is whether your current billing operation is producing results that justify its cost.

Pull your A/R aging report right now. If more than 15% of your receivables are sitting past 90 days, your in-house team is not keeping up. If your first-pass denial rate is above 8%, denials are not getting worked on the front end.

Use the Medicare Fee Schedule lookup tool to verify that your top 20 CPT codes are being reimbursed at the contracted rate. Underpayments that go undetected for six months become permanent revenue losses.

What a Transition Looks Like for a Multi-Location Group

The most common objection I hear from group practice administrators is not about cost. It is about disruption. "We can't afford a gap in billing during the switch."

A structured transition runs in parallel for 30 to 60 days. The outsourced partner begins working new claims while the in-house team winds down the existing A/R. No claims go unworked during the overlap.

We built a detailed guide on how to switch billing companies that covers the timeline, data migration, payer enrollment transfers, and the 14 questions to ask any billing partner before signing.

Frequently Asked Questions