Should a Solo Practitioner Outsource Medical Billing? Cost & Workload

Running a solo practice with lean billing leaves little room for waste. Billing is one of those areas that can look inexpensive until you add up everything happening behind the scenes.

Claims have to go out, of course, but that is only one part of the job. Someone still needs to check eligibility, fix rejected claims, post payments, work denials, follow unpaid balances, call payers, watch filing deadlines, and keep older A/R from sitting untouched.

At some point, many solo physicians start asking the same question: should all of that stay inside the practice, or would it make more sense to hand some or most of it to a billing company?

The answer depends heavily on how the practice operates today. An outside billing company can take pressure off a small staff and provide more consistent coverage, but that support comes with a fee. An in-house biller gives the practice more day-to-day control, but payroll is only part of the expense. Benefits, software, training, turnover, vacation coverage, and the time a physician or office manager spends supervising billing all affect the real cost.

So the useful comparison is not simply “employee salary versus 4% of collections.” A solo practice needs to look at what each model costs over a full year, how much work is actually being done, where revenue is being delayed, and how much oversight the physician still has to provide.

The sections below break those numbers down in a way that applies to an actual practice.

From the provider’s side of the EHR, billing can seem fairly contained. The encounter is documented, the charge is entered, and the claim moves to the next step.

What happens after that can take much longer.

A typical billing operation may include insurance verification, charge review, coding-related questions, claim submission, clearinghouse corrections, payment posting, secondary claims, denial follow-up, appeals, patient balances, payer calls, refunds, credit balances, and work on aging A/R.

CMS’s Administrative Simplification framework reflects that broader administrative workload. Standard healthcare transactions cover more than claims alone. They also include eligibility, claim status, remittance information, coordination of benefits, referrals, and authorization-related transactions. That matters in a small office because one person is often doing several jobs at once.

A front-desk employee may be perfectly capable of transmitting claims after the morning rush. The problem usually appears later. Denials need research. Old claims need follow-up. Payer calls can take time. Remittances have to be posted accurately. Appeals and timely-filing limits cannot always wait until there is a quiet afternoon.

Before comparing vendors, it helps to write down what is actually happening inside the practice now. Which billing tasks are completed every day or every week? Which ones are handled only when someone has time? Which balances are aging because nobody really owns the follow-up? Those answers usually reveal more than the monthly payroll number.

Billing companies do not all charge the same way. Some use a percentage of collections. Others charge a fixed monthly fee, a per-claim amount, an hourly rate, or a combination.

For a percentage-based arrangement, the basic math is simple. If the practice collects $50,000 in a month and the billing fee is 4%, the monthly fee is $2,000.That number is useful, but you shouldn’t treat it as the full cost until you review the contract.

A lower percentage may cover only claim submission and posting. A higher percentage may also include denials, insurance A/R, secondary claims, reporting, eligibility work, or other revenue-cycle functions. Comparing the percentages without comparing the scope can be misleading.

A practical annual calculation looks like this:

Annual outsourced cost = eligible collections × vendor percentage, plus any minimum fees, setup charges, technology costs, separately priced services, and internal labor that remains with the practice.

That last part is easy to miss.

The practice may still be responsible for provider documentation issues, staff coordination, coding questions, patient-facing work, credentialing, old A/R, or certain reports. A vendor may also charge separately for some of those services.

For example, a company advertising a 4% rate may exclude credentialing or legacy A/R recovery. Another company may include those functions. The headline percentage does not tell you which arrangement is actually less expensive. For a deeper look at how billing companies structure their pricing, see our medical billing cost breakdown.

The same problem occurs when practices calculate the cost of an internal biller.

A physician may look at a $45,000 salary and compare it with a $24,000 annual vendor fee. On paper, the vendor immediately looks cheaper. But salary is not the full internal cost.

The U.S. Bureau of Labor Statistics reported a median annual wage of $51,140 in May 2025 for medical records specialists. Actual compensation will vary by location, experience, specialty, and how much coding or revenue-cycle responsibility the role carries.

For an in-house comparison, add the expenses that sit around the salary. That includes employer payroll taxes, benefits, paid leave, billing software, clearinghouse charges, workstation costs, training, certifications, recruiting, onboarding, backup coverage, and management time.

A useful calculation is:

Annual in-house cost = compensation and employer costs + systems + training + coverage + management time + recruiting and replacement costs.

The employee who earns $45,000 may therefore cost materially more than $45,000 to keep in place for a full year. Some costs are easy to see. Payroll taxes and health benefits appear in the accounting records.

Others are less obvious. If the biller takes a week off and denials sit untouched, it costs money. If the physician spends several hours each month resolving billing questions, that time costs money. If the biller leaves and the practice needs six weeks to hire and train a replacement, the disruption has a cost even if it never appears under a line item called “billing.”

Physician and manager time is especially easy to overlook. Even 15 minutes a day spent answering billing questions, reviewing problem claims, checking reports, or helping with payer issues adds up over a year. In a solo practice, those hours may come out of patient care, administrative work, or personal time.

That is why the internal comparison should reflect the whole operation, not just the paycheck.

Here is what a full comparison looks like for a hypothetical solo practice collecting $60,000 per month. These numbers are illustrative; replace them with your own before drawing conclusions.

At this collection level with these assumptions, the outsourced model appears substantially less expensive. But the conclusion can flip in either direction as collections rise, the vendor scope narrows, or the in-house model becomes more efficient. That is why the next step is the break-even calculation.

The most useful number in this whole comparison is the collection level at which outsourcing stops being cheaper than your current in-house operation. Below break-even, outsourcing usually wins on cost. Above it, in-house usually wins provided the internal operation is actually performing.

Two solo practices both collecting $60,000 per month can have completely different billing workloads. A cash-heavy dermatology practice with three payers is not comparable to a Medicaid-dependent behavioral health practice with eight payers, weekly prior authorizations, and complex secondary billing.

Two implications:

A percentage that seems reasonable at $60,000/month may look different when the vendor understands you generate 400 claims a month and 80 denials, not 200 and 20.

If your current biller submits claims but doesn’t work denials or secondary claims, your in-house cost is understated because unresolved work costs money even when no one is doing it.

Before you can compare two billing models, you need to measure the one you already have. Collections alone is not enough. It tells you what came in, not what was left on the table.

Pull the last six to twelve months of data. Then require any vendor you evaluate to report against the same definitions.

For denial performance specifically, HFMA recommends metrics including initial denial rate by claim volume and dollars, denial write-offs, time from initial denial to appeal, time from initial denial to resolution, and the percentage of initial denials overturned. Adopting these definitions makes vendor comparisons cleaner because everyone is using the same math.

Once you know your baseline performance, you can calculate whether a more expensive vendor would still be worth it if they collected more.

Illustrative example, plug in your own numbers:

• Current monthly collections: $60,000
• Current internal billing cost: $6,400/month (~$76,600/year)
• Vendor A quote: 4% of collections + $500/month remaining internal work = ~$2,900/month
• Vendor B quote: 5% of collections + $500/month remaining internal work = ~$3,500/month

Vendor B costs $600/month more than Vendor A. To justify that difference on collections alone:

Required monthly collection improvement = $600 ÷ 5% = $12,000/month

Vendor B would need to consistently collect $12,000/month more than Vendor A to break even on the higher fee. If your current denial rate is high, your A/R is aging past 90 days, or your net collection rate has room to improve, that increase is at least conceivable. If your operation is already tight, it may   not be.

No honest vendor will guarantee improved collections. What they can do is show you their reporting cadence, their approach to denials and A/R, and their historical performance across a book of similar practices. Ask for that. Then run this calculation with your own numbers before you sign.

The choice is not always fully internal or fully outsourced. Solo practices with a capable employee but capacity gaps often benefit from splitting the revenue cycle between internal and outsourced work. Common hybrid structures include:

• Internal front desk plus outsourced claims and denials.

Retains eligibility and patient-facing work internally; moves back-end claim work outside.

• Internal biller plus outsourced denial and A/R specialist support.

Keeps day-to-day billing internal; adds specialist capacity where the practice has gaps.

• Outsourced coding review layered on internal billing.

Adds coding audit and modifier review without moving the full billing function.

• Outsourced old A/R recovery only

Targets aged claims a busy in-house biller cannot get to.

• Outsourced insurance follow-up with internal patient billing

Keeps patient communication in-house for relationship reasons.

• Temporary outsourcing during vacancies or leave

Preserves the in-house model long-term while covering short-term risk.

Large physician groups can divide revenue cycle responsibilities among multiple employees. A solo practice usually lacks that redundancy. One employee may understand the payer portals, clearinghouse, outstanding claims, authorization processes, and billing-system peculiarities. If that employee leaves unexpectedly, much of the practice’s institutional billing knowledge can leave with them.

The financial effects may not appear immediately. New claims may continue going out while clearinghouse rejections accumulate. Payment posting may fall behind. Denied claims may sit untouched. By the time leadership notices, some balances may already be past filing or appeal deadlines.

Outsourcing can reduce this key-person dependency because an organization provides billing capacity rather than one employee. The tradeoff is vendor dependence, which makes service levels, reporting, account access, communication, and exit provisions important when selecting a partner.

Outsourcing transfers tasks, not the practice’s underlying exposure. HHS identifies billing and claims processing as business-associate activities under HIPAA, and covered entities must put appropriate contractual safeguards in place around protected health information.

Before signing, get answers to at least these questions:

• Business Associate Agreement. Is a current, signed BAA in place, and does it reflect the specific services the vendor will perform?
• Access controls and audit logs. Who at the vendor has access to your data? Are accesses logged and reviewable?
• Offshore staff and subcontractors. Does the vendor use offshore staff or subcontractors, and are they covered under the BAA? Some payers restrict where they can handle their data.
• Breach notification. What is the vendor’s breach notification process, and does it meet the timelines required by HIPAA and your state?
• Coding responsibility. If the vendor performs or reviews coding, who is accountable for coding accuracy in an audit? What is their audit-support process?
• Upcoding, unbundling, and modifier controls. How does the vendor prevent and detect coding compliance issues?
• Credit balances and refunds. Who tracks credit balances, initiates refunds, and manages payer overpayment recovery requests?
• Record retention. How long are records kept, and how are they returned or destroyed at the end of the contract?
• Payer audit support. Does the vendor participate in payer audits and RAC/UPIC responses on your behalf?
• Cybersecurity insurance. What coverage does the vendor carry, and what is their incident response commitment?

Switching medical billing companies is where transitions quietly get expensive. Before signing, define ownership for each of these:

• Open claims and existing denials. Who works claims already submitted? Who owns denials received in the transition month?
• ERA and EFT enrollment. Payer-by-payer re-enrollment can take weeks. Who submits paperwork, and how are payments routed during the gap?
• Clearinghouse migration. Are you keeping your current clearinghouse or moving to the vendor’s? Who handles rejection queues during cutover?
• Payer portal credentials. Which portals need new users added? What data must be pulled from a departing biller’s login before it’s disabled?
• Unposted remittances. ERAs already downloaded but not yet posted who reconciles them?
• Appeal and timely-filing deadlines. What is the handoff plan for claims approaching a deadline in the first 30 days?
• Data migration. How is claim history, patient balance history, and A/R aging transferred?
• Parallel operation. Does the vendor run parallel with your current biller for a defined period to catch handoff errors?
• Data export at termination. If the arrangement ends, what data do you get back, in what format, and how quickly? 

A billing vendor that quotes 4% but can’t clearly answer transition questions isn’t really priced at 4%.

Patient billing is often listed as a service without much discussion of what it actually looks like. Before signing, understand:

• Who answers billing calls. Is it the vendor’s staff, and do they identify by your practice name or their own?
• Response times. How quickly are patient calls returned? What are the hold-time expectations?
• Statement cadence. How often are statements sent, and by what channel — paper, email, portal, text?
• Payment plans. Can patients set up payment plans, and what are the parameters?
• Financial hardship policies. How are financial assistance and charity-care applications handled?
• Collections escalation. When and how does a balance move to collections? Who signs off?
• Complaint handling. What is the process when a patient disputes a charge, and how are you notified?

Suppose a practice is choosing between two billing arrangements: one at 4% of collections, one at 5%. At $60,000 in monthly collections, that difference is $600 per month, or $7,200 per year. The instinct may be to pick the 4% vendor immediately. The better question is what each vendor actually does for that percentage.

If the lower-priced service excludes denial appeals, old A/R, secondary claims, or coding review, the nominally cheaper option may not have the lower total cost. The reverse is also true: a higher billing fee does not guarantee better collections. Evaluate scope, execution, visibility, accountability, and compliance posture alongside price.

Before signing a medical billing agreement, define who owns each revenue cycle function.

For a solo practice, important questions include whether the fee covers claim preparation and submission, clearinghouse rejections, payment posting, denial management, appeals, insurance A/R follow-up, secondary claims, eligibility verification, patient statements, coding support, prior authorization, and reporting.

Also ask whether services such as credentialing, payer enrollment, legacy A/R recovery, coding audits, or refund processing are included or separately priced. “Full-service billing” has no universal definition.

The contract should also define what counts as a collection if the fee is percentage-based. Vendors handle patient payments, insurance payments, legacy balances, capitation, refunds, and revenue collected before the transition differently. Clarity before onboarding prevents disputes later. Our guide on how to choose a medical billing company walks through the fuller evaluation checklist.

Outsourcing is not automatically the right answer. Keeping billing in-house can work well when the practice has an experienced biller, claim volume is manageable, A/R is healthy, denials are consistently addressed, and the physician has good visibility into billing performance.

Internal billing may also appeal to physicians who want direct control over staff priorities and patient-account communication. The key is performance. If the current operation is affordable, stable, measurable, and consistently follows claims through payment, outsourcing simply because it is available may create unnecessary disruption.

Solve an actual business problem. Do not outsource for its own sake.

The case for outsourcing grows stronger when billing competes with other essential practice responsibilities. Signs worth investigating include:

• The physician regularly handles routine payer follow-up.
• Front-desk staff handle billing between patients and phone calls.
• Denied claims lack consistent ownership, or nobody can explain the common medical claim denial codes coming back from payers.
• Payment posting is falling behind.
• 60-, 90-, or 120-day A/R is increasing.
• One employee controls nearly all billing knowledge.
• Clearinghouse rejections remain unresolved.
• The practice struggles to hire or retain experienced billing staff.
• Reporting cannot clearly explain why claims remain outstanding.
• Practice growth is creating more billing volume than current staff can manage.

Use this as a starting point for narrowing your options, not as a rule. Actual fit still depends on your specialty, payer mix, and staffing.

This matrix is a hypothesis, not a conclusion. Run the cost formulas, the workload inventory, and the performance metrics before committing to any model.

1. Calculate your true internal cost. Use the annual in-house cost formula. Include employer taxes, benefits, software, training, coverage, and management time.
2. Map your workload. Complete the workload inventory. Vendors need it to price accurately, and you need it to compare apples to apples.
3. Measure current performance. Pull six to twelve months of data on clean claim rate, denial rate, days in A/R, A/R > 90 days, net collection rate, and timely-filing write-offs.
4. Obtain comparable proposals. Require vendors to price against your workload inventory and to report performance using your metric definitions. Ask compliance and transition questions before scope questions.
5. Run the break-even and performance-offset math. Calculate the collection level at which outsourcing stops being cheaper. Calculate the collection improvement a higher-priced vendor would need to justify their fee.

The answer usually becomes clearer once you have documented all five.

A poorly structured outsourcing relationship can reduce visibility if the vendor provides weak reporting or controls access to important billing data. That is why you should address technology access, reporting frequency, communication expectations, and data ownership before signing.

A well-structured outsourced arrangement should let the physician retain oversight without managing every claim personally. The practice should still see what has been billed, paid, denied, adjusted, and left outstanding and know which problems require action from the provider or staff. The goal is not to surrender control. It is to separate revenue-cycle control from responsibility for performing every administrative task.

For many solo practitioners, outsourcing becomes financially attractive when the total cost and burden of internal billing approaches or exceeds the vendor fee, when one employee becomes a significant operational dependency, or when billing work begins competing with patient care and practice operations.

Outsourcing is not automatically cheaper or better. A practice with modest claim volume, a strong biller, healthy A/R, low denial burden, and clear reporting may have little reason to change. Another physician with similar collections may be struggling with staffing, aging claims, and inconsistent payer follow-up and could benefit substantially from moving the work outside.

The decision depends on monthly collections, specialty, claim volume, staffing, billing performance, compliance posture, patient experience preferences, and the scope an outside company will actually provide.

Revix MD offers outsourced medical billing services for independent and growing practices that want to move day-to-day billing work out of the office while maintaining visibility into financial performance.

Depending on the engagement, support can include claim preparation and submission, payment posting, denial management, A/R follow-up, eligibility workflows, payer follow-up, and revenue cycle reporting. Qualifying small practices may use Revix MD’s 4% of collections pricing model, with the exact service scope and billing basis established before onboarding.

The goal is not to tell every solo physician to outsource. It is to help practices determine whether their current billing model is producing the financial and operational results they need and to provide a clear alternative when it is not.