Medical Billing Audit Services - Find What Your Practice Is Losing
Most practices lose 15–25% of collectible revenue without ever knowing it. Our certified billing audit specialists identify every coding error, missed charge, compliance gap, and denial pattern and show you exactly how to recover it.
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98% Audit Accuracy Rate
15–25% Average Revenue Recovered
500+ Practices Audited
All Specialties Covered
What Is a Medical Billing Audit and Why Does Your Practice Need One?
A medical billing audit is a systematic review of your practice’s claims, coding, documentation, and billing processes to identify errors, compliance risks, and missed revenue opportunities. It is not just a compliance exercise it is one of the most powerful financial tools available to any healthcare provider.
The average medical practice has a claim error rate of 7–10%. For a practice billing $1 million annually that means up to $100,000 in incorrectly submitted, underpaid, or written-off claims every single year. Most of that money is recoverable but only if you know where to look.
A professional billing audit by OrinSols gives you a complete picture of your billing health. We examine every layer of your revenue cycle from how your front desk captures patient information to how your coders assign diagnosis codes to how your billing team follows up on unpaid claims and we deliver a clear, actionable report showing you exactly what to fix and what it is worth.
Whether you are concerned about a government audit, suspecting your current biller is underperforming, or simply want to ensure your practice is running at peak financial efficiency, a billing audit is the first and most important step.
Signs Your Practice Needs a Billing Audit Right Now
Your denial rate is above 5% and climbing. Your AR days are consistently over 45 days. You have a high volume of write-offs with no clear explanation. Your collections have plateaued or declined despite stable patient volume. You recently changed billing staff or outsourced billing and are unsure of the transition quality. You received a payer audit request or a RAC audit notice. Your documentation and coding feel inconsistent across providers. You suspect undercoding or overcoding in specific service lines. You have never had an independent billing audit performed.
If any of these apply to your practice, you are almost certainly leaving significant revenue on the table and potentially carrying compliance risk you are not aware of.
Types of Medical Billing Audits We Perform
Prospective Billing Audit
A prospective audit reviews claims before they are submitted to payers. This is the most powerful type of audit for preventing problems before they happen. Our team examines charge capture, coding accuracy, documentation completeness, and modifier usage catching errors at the source rather than chasing corrections after the fact. Prospective audits are ideal for practices onboarding new providers, implementing new service lines, or recovering from a period of high denial rates.
Retrospective Billing Audit
A retrospective audit reviews claims that have already been submitted and adjudicated. We examine a statistically significant sample of your historical claims typically 12 months to identify patterns of undercoding, overcoding, missed charges, incorrect modifier use, and documentation deficiencies. Retrospective audits reveal the true financial impact of billing errors over time and provide the data needed to quantify exactly how much revenue your practice has lost and can recover.
Compliance Billing Audit
A compliance audit evaluates your billing practices against current CMS guidelines, payer-specific policies, HIPAA requirements, and OIG compliance program standards. This type of audit is critical for practices that want to reduce their risk of government investigation, RAC audits, or payer contract disputes. We review your documentation protocols, E&M coding patterns, modifier usage, place of service codes, and billing policies to ensure everything aligns with current regulatory requirements.
Denial Analysis Audit
A denial analysis audit focuses specifically on your denied and rejected claims to identify systemic patterns causing repeated revenue loss. We categorize denials by type, payer, provider, and procedure code then trace each pattern back to its root cause in your billing or clinical workflow. Most practices have 3–5 denial patterns that account for 80% of their total denials. Fixing those specific issues can dramatically improve your first-pass acceptance rate within 30–60 days.
E&M Coding Audit
Evaluation and Management coding is the most audited and most error-prone area in medical billing. Our E&M coding specialists review your provider documentation and coding patterns to ensure the correct level of service is being billed for every encounter. Undercoding E&M visits is extremely common especially among physicians who are conservative out of compliance concern. We identify where your providers are consistently undercoding and show them exactly what documentation supports higher-level billing legally and compliantly.
Payer-Specific Contract Audit
Are you being paid what your payer contracts say you should be? Payer underpayments are far more common than most practices realize. Our contract audit compares your actual payment receipts against your contracted fee schedules for each payer to identify systematic underpayments which we then pursue through formal dispute and appeal processes. Many practices recover tens of thousands of dollars annually through payer contract audits alone.
Third-Party Biller Audit
If you are currently outsourcing your billing and want to verify that your billing company is performing as promised, a third-party biller audit is essential. We independently review your outsourced biller's claim submission rates, denial management performance, AR follow-up activity, and coding accuracy giving you an unbiased assessment of whether they are actually earning their fee.
What Our Billing Audit Process Looks Like
Step 1 — Initial Consultation & Scope Definition
We begin with a detailed conversation about your practice — your specialties, patient volume, payer mix, current billing setup, and any specific concerns you have. Based on this, we define the scope of your audit including the time period to review, the sample size of claims, and the specific areas of focus.
Step 2 — Data Collection & Secure Access
You provide us with secure access to your billing system, EHR, and relevant financial reports. All data is handled under a signed Business Associate Agreement and fully encrypted data transfer protocols. We never require more access than is strictly necessary for the audit scope.
Step 3 — Claims & Documentation Review
Our certified auditors review each claim in the sample against the corresponding clinical documentation. We examine diagnosis codes, procedure codes, modifiers, place of service codes, provider signatures, medical necessity documentation, and payer-specific requirements — flagging every discrepancy we find.
Step 4 — Denial Pattern Analysis
We pull and categorize all denials in the audit period by type, payer, procedure, and provider. We identify recurring patterns and trace them to specific workflow breakdowns — whether in scheduling, documentation, coding, or billing follow-up.
Step 5 — Payer Payment Verification
Where applicable we cross-reference your payment receipts against your contracted fee schedules to identify underpayments by payer and procedure code.
Step 6 — Compliance Risk Assessment
We evaluate your billing patterns against current CMS guidelines and OIG risk indicators — flagging any areas where your practice could be vulnerable to audit or recoupment action.
Step 7 — Detailed Audit Report & Findings
You receive a comprehensive written audit report covering every finding, organized by category and priority. The report includes the financial impact of each issue, the compliance risk level, and specific corrective action recommendations for each finding.
Step 8 — Results Presentation & Action Plan
We walk you through the audit findings in a live presentation with your billing team and practice leadership. We answer every question and help you build a prioritized action plan to address findings in order of financial and compliance impact.
Step 9 — Implementation Support
Unlike audit firms that hand you a report and disappear, OrinSols stays with you through implementation. We help your team correct billing workflows, update coding practices, appeal underpayments, and resubmit correctable claims — turning audit findings into actual recovered revenue.
What We Look For in a Medical Billing Audit
Upcoding and downcoding patterns across all providers. Unbundling of procedure codes that should be billed together. Incorrect use of modifiers 25, 59, 51, and others. Missing or insufficient documentation to support the billed level of service. Incorrect place of service codes for telehealth or outpatient visits. Duplicate claim submissions. Claims billed under the wrong provider NPI. Failure to capture all billable services from clinical notes. Incorrect global period billing for surgical procedures. Non-covered services billed to Medicare or Medicaid without proper ABN. Coordination of benefits errors on secondary payer claims. Authorization and referral requirement violations. Timely filing limit violations causing avoidable denials. Systematic payer underpayments against contracted rates. HIPAA compliance gaps in billing data handling.
Common Billing Errors We Find in Every Audit
In over 500 billing audits performed, OrinSols consistently finds the same categories of errors across nearly every practice regardless of size or specialty.
The most common finding is E&M undercoding physicians billing 99213 for visits that clearly document a 99214 or 99215 level of service. This single error alone can cost a practice $50,000–$150,000 per year in lost revenue depending on patient volume.
The second most common finding is missed charges procedures, supplies, or services performed and documented but never billed. This happens most often in surgical practices, infusion centers, and multi-provider groups where clinical and billing workflows are disconnected.
The third most common finding is denial pattern blindness billing teams that process denials individually without recognizing that the same denial reason is occurring hundreds of times per month because of a single fixable upstream error.
The fourth most common finding is payer underpayment practices accepting whatever amount payers remit without ever verifying it against their contracted fee schedule. Payers underpay far more frequently than most providers realize, and they count on providers not checking.
Industries and Specialties We Audit
Our billing audit specialists have deep expertise across all major medical specialties:
Dentistry
Dental procedures, preventive care, and insurance claim handling with precision coding support.
OB/GYN
Maternity, prenatal, and gynecological procedure billing with global package expertise.
Neurology
EEG, EMG, and neurological testing billing with accurate CPT coding and documentation support.
Orthopedics
Surgical, fracture care, and therapy billing with correct modifier usage and global period handling.
Psychiatry
Mental health billing, telehealth claims, and behavioral health documentation compliance.
Primary Care
Routine visits, chronic care management, and preventive service billing solutions.
Endocrinology
Diabetes, thyroid disorders, and hormone therapy billing with accurate diagnosis linking.
Pain Management
Injection therapies, nerve blocks, and chronic pain treatment billing services.
Infectious Disease
Complex infection treatment billing with inpatient and outpatient coding accuracy.
ASolo physician practices · Small and mid-size group practices · Large multi-location practices · Hospital outpatient departments · Ambulatory surgery centers · Behavioral health organizations · Home health agencies · Skilled nursing facilities
The Financial Impact of a Professional Billing Audit
The numbers speak for themselves. Here is what OrinSols billing audits typically uncover: Average revenue recovered from E&M undercoding corrections: $50,000–$150,000 annually per provider.
Average revenue recovered from missed charge identification: $20,000–$80,000 annually. Average revenue recovered from payer underpayment disputes: $15,000–$60,000 annually. Average reduction in denial rate following audit recommendations: 30–40%. Average improvement in first-pass claim acceptance rate: 15–25 percentage points. Average reduction in AR days following audit implementation: 10–18 days.
For most practices the return on investment from a single billing audit pays for itself many times over within the first 90 days of implementation.
How Our Billing Audit Helps You Prepare for Government Audits
RAC audits, MAC audits, OIG investigations, and Medicaid integrity contractor reviews are increasing in frequency and scope. Healthcare providers who have never conducted an internal compliance audit are the most vulnerable.
OrinSols billing audits are specifically designed to identify the same risk areas that government auditors target high-frequency billing codes, outlier utilization patterns, documentation gaps, and modifier abuse. By finding and correcting these issues proactively you dramatically reduce your exposure to recoupment demands, penalties, and in serious cases criminal investigation.
We also help practices that have already received a government audit notice respond appropriately, prepare documentation, and challenge incorrect findings through the appeals process.
Why Choose OrinSols for Your Medical Billing Audit
Certified Auditors: Every audit is performed by credentialed billing and coding professionals holding active CPC, CCS, or CHC certifications. Not general consultants certified specialists.
Independent & Objective: We have no relationship with your current billing company or EHR vendor. Our findings are completely independent and in your practice’s interest alone.
Specialty-Specific Expertise: Generic billing auditors miss specialty-specific errors. Our auditors have worked in your specialty and understand the specific coding rules, payer policies, and documentation requirements that apply to your practice.
Actionable Reports: We do not deliver reports full of vague observations. Every finding includes the specific claim, the specific error, the financial impact, the compliance risk level, and the exact corrective action required.
Full Implementation Support: We stay with you after the report. Our team helps you correct workflows, appeal underpayments, resubmit correctable claims, and train your billing staff so the same errors do not recur.
HIPAA-Compliant Process: Signed BAA before we touch any data. Encrypted transfer protocols. Strict access controls. Your patient data never leaves a secure environment.
No Long-Term Commitment: A billing audit is a standalone engagement. There is no pressure to sign a long-term billing contract. Many clients do go on to use our billing services after seeing our audit results but that is entirely your choice.
Frequently Asked Questions About Medical Billing Audits
How long does a medical billing audit take?
Most audits are completed within 7–14 business days depending on the volume of claims reviewed and the complexity of your payer mix. Urgent audits prompted by a government audit notice can be expedited.
How many claims do you review in an audit?
We follow OIG-recommended statistically valid sampling methodology. For most practices this means reviewing 30–50 claims per provider per audit period, selected randomly across payer types and procedure codes to ensure representative results.
Will the audit disrupt my practice operations?
No. We work from your existing data and systems with read-only access. Your billing team continues normal operations throughout the audit process with zero interruption.
What if the audit finds serious compliance issues?
We handle findings with complete confidentiality and help you develop a corrective action plan. For serious compliance issues we can connect you with healthcare compliance attorneys if needed and help you evaluate whether voluntary self-disclosure to CMS is appropriate.
Can you audit claims going back several years?
Yes. We can review historical claims going back as far as your data retention allows typically 5–7 years. Retrospective audits covering multiple years are particularly valuable for identifying long-running systematic errors.
Do you provide expert testimony if we are under government investigation?
Our audit team can provide written expert opinion on billing and coding matters. For formal legal proceedings we recommend engaging a healthcare attorney who can retain our experts as consultants.
How much does a billing audit cost?
Our free initial audit covers a sample review of your recent claims and provides a high-level assessment of your billing health at no charge. Full comprehensive audits are priced based on scope, specialty, and number of providers contact us for a custom quote.
What is the difference between a billing audit and a compliance audit?
A billing audit focuses primarily on revenue — finding errors that are costing you money. A compliance audit focuses primarily on risk finding errors that could expose you to regulatory action. OrinSols performs both simultaneously in our comprehensive audit, because the two are deeply interconnected.
Book An Appointment
Get Your Medical Billing Audit Today
You have nothing to lose and potentially tens of thousands of dollars to gain. Our free initial billing audit reviews a sample of your recent claims and delivers a clear, honest assessment of your billing health with zero obligation and zero disruption to your practice.
Most practices that complete a free audit with OrinSols discover at least one significant revenue gap they were completely unaware of. The question is not whether the problems exist. The question is how long you want to keep losing money before you find them.
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Locations We Serve
OrinSols provides medical billing audit services to healthcare providers across the United States including: Medical Billing Audit Services in California · Medical Billing Audit Services in Texas · Medical Billing Audit Services in Florida · Medical Billing Audit Services in New York · Medical Billing Audit Services in New Jersey And remotely to practices in all 50 states from our headquarters at 117 S Lexington St, Ste 100, Harrisonville, MO 64701.