Jul 30, 2026
How Much Does It Cost to Outsource Medical Billing?
- Medical Billing
- OneMed Billing
Why leakage survives good reporting
Your reports show what happened. An audit finds what didn’t.
Every system in your revenue cycle reports on events. A denial generates a denial. An aged claim appears on the aging report. A payment posts. But nothing in your billing software generates a record of a charge that was never captured, a service coded a level below what the note supported, or a payment that arrived under contract and was accepted as correct. Absence doesn’t raise an alert. That’s precisely why it persists.
Things that happened
Your reports already show these
-
A claim was denied
denial report -
A claim is ageing
A/R aging -
A payment arrived
posting log -
A claim was rejected
clearinghouse
Things that didn’t
No report exists for these
-
A charge never captured
nothing -
A level never coded
nothing -
An underpayment accepted
nothing -
A denial never worked
nothing
Nothing generates a report about a claim that was never created.
Which is why the only way to find the second column is for someone to go looking on purpose.
This is also why leakage tends to be found late and by accident. An audit is simply the decision to look deliberately, on a defined sample, against what the documentation and the contract say should have happened.
Overview
What a medical billing audit actually is
A structured review of claims, payments, adjustments and denials, run against what your documentation supports and what your payer contracts specify — to identify revenue leakage, compliance exposure, and the workflow gaps producing both.
Practices lose revenue to underpayments, incorrect adjustments, missed charges and coding errors without ever seeing a symptom, because none of those things announce themselves. The audit’s job isn’t to confirm what you already suspect. It’s to quantify what you can’t currently see, and to say plainly which findings are worth acting on first.
Documentation
what was done
Contract
what was owed
Compared with
what was billed
and what was paidThe gap between those four is the finding.
FINDINGS
Common revenue leaks we identify
Each of these is recoverable in principle. What they have in common is that none of them generates an alert on its own.
Underpaid claims
Paid below the contracted or expected allowed amount. Identifying these requires the rate to compare against, which is why we ask for fee schedules upfront.
Incorrect contractual adjustments
Wrong adjustment amounts or codes quietly reducing reimbursement, often applied consistently enough that they look correct.
Missed or delayed charges
Services delivered and documented but never captured, or entered too late to be billed. These produce no denial and appear on no report.
Bundling and modifier errors
Incorrect bundling or modifier usage causing reduced payment or denial on claims that were otherwise clinically sound.
Timely filing losses
Claims denied for late submission or late follow-up — entirely preventable, and permanent once the window closes.
Unworked denials
Denials never appealed or resolved before the payer’s deadline, usually because nobody had capacity rather than because they’d have failed.
Undercoded services
Visits or procedures billed below the level the documentation supports — legitimate revenue lost through caution rather than error.
Authorization gaps
Authorization required but not obtained, expired, or not matched to the service billed.
Documentation problems
Notes that don’t fully support medical necessity, coding levels or the procedures billed — a compliance exposure as much as a revenue one.
Code sets, payer edits and contract terms change. Every finding is assessed against the rules in force for that payer and date of service.
Two different jobs
Pre-bill prevents. Post-bill recovers.
Both are audits, but they sit on opposite sides of submission and answer different questions. Most practices need some of each — one stops next quarter’s losses, the other reclaims last quarter’s.
Before the claim goes out
Claim submitted
After the payer has paid
Pre-bill audit
Goal: prevention- Coding and modifier accuracy checked against the documentation
- Charge capture verified before submission
- Documentation reviewed for medical necessity support
- Reduces denials and rework rather than correcting them later
Post-bill audit
Goal: recovery- Paid amounts compared against expected or contracted rates
- Contractual adjustments checked for accuracy
- Denial and write-off patterns traced to root cause
- Identifies money already lost that may still be recoverable
INDEPENDENCE
Internal review versus an independent audit
Internal audits are genuinely useful, and we’d encourage any practice to run them. The limitation isn’t competence — it’s that a team auditing workflows it designed is looking for problems it doesn’t expect to find.
| Dimension | Internal billing audit | Independent external audit |
|---|---|---|
| Typical focus | Routine checks and compliance monitoring | Systemic issues, leakage and payer behaviour |
| Familiarity with the workflow | Can mask issues that look normal | No assumptions about how things are done |
| Payer underpayment detection | Rarely in scope | Paid vs expected compared directly |
| Contractual adjustment review | Seldom checked | Adjustments verified against contract |
| Time available to do it properly | Competes with daily billing | Dedicated to the review |
| Willingness to report uncomfortable findings | Varies by culture | Reported plainly, including over-coding |
The strongest arrangement is usually both: internal review for ongoing monitoring, an external audit periodically to catch what routine has normalised.
WHAT'S INCLUDED
The audits we run
Scoped to what your practice actually needs, rather than a single fixed package.
Pre-bill audits
Coding, modifiers, documentation and charge accuracy reviewed before claims go out, to reduce denials and rework at source.
Post-bill audits
Submitted and paid claims analysed for underpayments, incorrect adjustments and recovery opportunities.
Denial audits
Top denial reasons and trends identified across payers, so repeat denials get fixed at the cause rather than one claim at a time.
Underpayment audits
Paid amounts compared against expected or contracted rates to detect payer underpayments and reimbursement variance.
A/R audits
Aging, follow-up workflow and payer response patterns reviewed to find where collections are stalling.
Coding audits
Coding and modifier usage evaluated for accuracy and compliance, including over-coding as well as under-coding.
HOW IT WORKS
From data collection to correction plan
Structured, transparent, and scoped so you know what's being reviewed and why.
Scope agreed and data collected
We agree what's being reviewed and why, then collect EOBs, ERAs, claims data, denial reports and secure PM or EHR access. Fee schedules too, where underpayment review is in scope.
1
2
Claim and payment analysis
Claims and payment data reviewed line by line to detect discrepancies and variance against what was expected.
Underpayment identification
Claims paid below the expected or contracted amount identified, with the comparison basis stated for each.
3
4
Root cause analysis
We establish why the pattern exists — a coding habit, a workflow gap, a payer behaviour — rather than only listing symptoms.
Recovery and correction plan
A targeted plan covering what can still be recovered and what needs changing so it stops recurring.
5
6
Reporting and recommendations
Findings delivered with revenue impact, priority order, and clear owners for each recommended fix.
Audit report
Summary of findings and risk areas
Claim-by-claim results with corrections
Revenue impact of each finding
Denial root-cause and error trends
Action plan with owners
Illustrative report contents.
Deliverables
What you actually receive
A findings report is only useful if someone can act on it. Ours is written to be handed to a billing manager and worked through, not filed.
- Audit summary with key findings and risk areas
- Detailed claim-by-claim review results with corrections
- Revenue impact and missed reimbursement estimates
- Denial root-cause analysis and error trends
- Compliance and documentation risk notes
- A clear action plan with recommended fixes
- Staff training suggestions where a pattern points to a knowledge gap
- Optional follow-up audit to verify the fixes held
Revenue impact figures are estimates based on the sample reviewed and the rates available to compare against. They indicate scale and priority — they are not a guarantee of recovery, because recovery depends on filing windows, payer response and documentation.
WHO IT'S FOR
Audit support for practices of any size
The leaks differ by structure — so the scope does too.
Small practices
Catch missed charges, coding errors and preventable denials without hiring additional billing staff or an in-house auditor.
Group practices
Billing accuracy compared across multiple providers and departments, with consistent review and clear correction guidance.
Multi-specialty clinics
Specialty-specific coding issues, modifier mistakes and documentation gaps that drive rejections in one department but not another.
Single-specialty practices
Reduced payer scrutiny and stronger compliance, with claims checked against that specialty's particular billing rules.
Multi-location practices
Workflow breakdowns between sites that cause delayed charges, missed follow-ups and inconsistent results.
Growing practices
Issues fixed early, before rising patient volume turns a small error rate into a large one.
GET STARTED
Request a billing audit
Tell us what’s prompting the question — rising denials, unexplained write-offs, or revenue that stopped tracking volume — and we’ll scope an audit around it rather than selling you a fixed package.
- Scoped to your situation, with the data requirements set out upfront
- BAA executed before any records are shared
- Most audits complete within one to three weeks
Prefer to talk now?
(315) 366-8242
Request your review
We'll reply within one business day to scope it with your team.
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Frequently Asked
Common questions.
What does a medical billing audit include?
A detailed review of claims, payments, adjustments and denials to identify where revenue is being lost. It evaluates coding and modifier accuracy, payer reimbursement against expected rates, denial trends, write-offs and A/R follow-up workflows — then reports the errors, inefficiencies and compliance risks found, with a recommendation attached to each.
What revenue leaks can an audit uncover?
Underpayments from payers, incorrect contractual adjustments, missed or unbilled charges, recurring denial patterns, documentation and coding gaps, and aging A/R that isn’t being followed up. Most of these produce no alert of their own, which is exactly why they persist.
How do I know if my practice needs a billing audit?
Common signals are rising denials, delayed payments, growing A/R, unexplained write-offs, or inconsistent reimbursement for the same service. Audits are also worth running after a system change, after staff turnover, or whenever revenue stops tracking patient volume.
Will you identify underpayments and payer issues?
Yes — where we have something to compare against. Identifying a contractual underpayment requires the contracted rate or fee schedule for that payer. Where those are available, paid amounts are compared line by line against expected reimbursement. Where they aren’t, we identify variance by payer pattern instead and tell you which basis was used, because the two differ in how conclusive they are.
Can you audit denials and find root causes?
Yes. Denials are analysed by payer, reason code, procedure and workflow step to establish why claims are being denied — covering eligibility, authorization, coding, documentation and submission process issues.
What data do you need and how long does it take?
Typically claim data, denial reports, remittance files (ERA or EOB) and an AR aging report, plus fee schedules or contracted rates if underpayment review is in scope. Most audits take one to three weeks depending on claim volume, data availability and scope.
Will an audit tell us things we don’t want to hear?
Sometimes. An independent audit can find over-coding as well as under-coding, and where it does we report it plainly — knowing early is considerably better than a payer finding it during a post-payment review. An audit that only ever returns good news isn’t an audit.
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