Medical Billing Audit Services for Healthcare Providers
Certified auditors identify under-coding, compliance risks, and revenue leakage before they become a liability.
- HIPAA-Compliant
- U.S.-Based Experts
- Free Practice Audit
Protect Your Practice From RAC Audits and Compliance Risk
Recovery Audit Contractors and private payers are increasing scrutiny on provider billing every year. If your documentation does not fully support the codes you billed, your practice is exposed to clawbacks, repayment demands, and penalties that can show up years after the original claim was paid.
A proactive medical billing audit is the best defense against this. Rather than waiting for a payer to flag your practice, we review your charts and coding internally to catch problems before they become a liability.
Astral Medical Billing provides medical billing audit services performed by Certified Professional Medical Auditors. We look at both compliance risk and revenue opportunity, because most practices we audit are not just under documented in some areas, they are also leaving money on the table in others.
What Our Medical Coding Audit Services Cover
Compliance Review
We verify that your documentation actually supports the codes that were billed. This includes checking for medical necessity, proper provider signatures, and complete documentation that would hold up under a payer audit.
Coding Accuracy Analysis
Many practices under-code out of caution, billing a lower level visit than what the documentation supports because they are worried about scrutiny. Others over-code without realizing it. We find where your coding sits relative to what your documentation justifies and correct it in both directions.
Evaluation and Management Audits
E/M coding is one of the most commonly audited and most frequently miscoded areas in medical billing. We review your E/M visit levels against the 2026 documentation guidelines to confirm accuracy.
Provider Education and Training
Finding errors is only half the job. We provide detailed reports broken down by provider along with one-on-one feedback sessions so your physicians understand exactly what needs to change in their documentation going forward.
Types of Medical Billing Audits We Perform
- Prospective or Pre-Bill Audits. We review charts before claims are submitted, catching documentation gaps and coding issues before they ever reach a payer.
- Retrospective or Post-Bill Audits. We review claims that have already been submitted and paid, identifying patterns of under-coding or compliance risk across a broader sample of your billing history.
- Focused Audits. When you have a specific concern about a particular code, provider, or payer, we run a targeted audit on that specific area rather than a full practice review.
"The audit revealed we were under-coding our Level 4 visits by 15%. Correcting this added $50k to our annual revenue without seeing a single extra patient."
Practice Administrator
Internal Medicine
How an Audit Runs
01
Scope and Sample
We agree what the audit should answer, then pull a sample of encounters for each provider that covers their most-billed codes and highest-dollar services.
02
Chart-to-Claim Review
Each encounter's documentation is compared line by line with the claim that was billed: diagnosis codes, procedure codes, modifiers, units, and level of service.
03
Findings Report
You receive an accuracy rate for each provider, every error grouped by type, and the dollar effect in both directions: what was under-billed and what is at risk of being taken back.
04
Education and Follow-Up
Providers get specific feedback on their own charts. We recommend a short follow-up review a few months later to confirm the changes held.
What Audits Usually Find
The same handful of problems turn up in most practices. Some cost you revenue today, and others create a liability later.
| Finding | What it looks like | Why it matters |
|---|---|---|
| Under-coding | A visit documented at level 4 billed as level 3 | Revenue that was earned and never collected |
| Over-coding | A level of service higher than the note supports | Repayment demands if a payer reviews the same charts |
| Missing or wrong modifiers | A procedure and a visit on the same day with no modifier 25 | Bundling denials such as CO 97 |
| Diagnosis does not support the service | A vague diagnosis on a procedure that has coverage rules | Medical necessity denials (CO 50) |
| Cloned documentation | Notes copied forward from visit to visit without change | A red flag in payer reviews, even when the care was appropriate |
| Missing signatures or time | Unsigned notes, or time-based codes with no time recorded | The service cannot be supported at all if it is reviewed |
The Audits You Do Not Control
An internal audit is a rehearsal for reviews you do not control. Medicare's Recovery Audit Contractors look back at paid claims for improper payments, generally up to three years after payment. Targeted Probe and Educate reviews pull 20 to 40 claims from a provider whose billing stands out, and repeat for up to three rounds if errors continue. Commercial payers run their own post-payment reviews under the terms of your contract.
What these reviews have in common is that they judge the chart, not the intent. If the documentation does not support the code, the payment can be taken back, and when a small sample shows a high error rate, a payer may project that rate across a much larger set of claims.
That is why federal compliance guidance for small practices suggests reviewing claims at least once a year, with five to ten records per physician as a baseline. Finding a pattern yourself gives you the chance to fix it and, where an overpayment is involved, to return it properly: Medicare expects identified overpayments to be reported and returned within 60 days. Fixes usually start with coding and carry through to denial management.
Check Your Own Numbers
Frequently Asked Questions About Medical Billing Audit Services
Most practices benefit from an annual comprehensive audit, with focused audits performed more frequently for high-risk areas or after onboarding new providers. Practices in specialties with higher audit scrutiny from payers may want to audit twice a year.
Under-coding means billing a lower level of service than the documentation actually supports, which means the practice is leaving revenue uncollected. Over-coding means billing a higher level than what is documented, which creates compliance risk and potential repayment liability if caught in a payer audit.
In many cases, yes. We commonly find that practices are under-coding visits out of caution, and correcting that brings in revenue that was already earned but never billed for. The exact impact depends on your current documentation and coding patterns.
We document the issue, explain why it is a risk, and provide specific guidance on how to correct documentation going forward. For retrospective findings involving overpayments, we help you understand your obligations for self-disclosure and repayment.
A focused audit on a specific code or provider typically takes one to two weeks. A comprehensive practice-wide audit usually takes three to four weeks depending on chart volume.
Yes. Every audit includes a detailed report and one-on-one feedback sessions with your providers so the findings translate into actual changes in documentation practices.
It depends on the size of the practice and what the audit needs to answer. A common baseline, taken from federal compliance guidance for small practices, is five to ten encounters per provider. A focused audit on one code or one provider can use a smaller, targeted sample.
An internal audit is one you commission to find and fix problems privately. A payer audit, such as a Medicare Recovery Audit Contractor review or a Targeted Probe and Educate review, is run by the payer and can end in repayment demands. The point of an internal audit is that a payer audit finds nothing new.
Related Services
Medical Billing and Coding
Certified coding that holds up to payer review
Denial Management
Denial analysis, appeals, and prevention
Revenue Cycle Management
The full cycle, managed as one process
Medical Billing Services
End-to-end billing for independent practices
AR Management
Aged AR recovery and payer follow-up
MIPS / MACRA
Quality reporting for Medicare payments
Provider Credentialing
Payer enrollment handled end to end
Outsource Medical Billing
Compare in-house and outsourced billing costs
Secure Your Practice
Book a consultation with our Certified Professional Medical Auditors (CPMA).