A Comparative Billing Report (CBR) is a free educational report from CMS that shows how a provider’s Medicare billing for a specific service compares with state and national peers. It is not an audit and does not require a response, but it flags patterns that are statistically different from peers, so practices should use it to review their coding and documentation.
Comparative Billing Report (CBR): What Medical Coders and Billers Need to Know
A Comparative Billing Report (CBR) is an educational tool that Medicare uses to help providers, medical coders, and billing professionals. Specifically, it shows how their billing patterns compare to national, state, and peer group data. These reports aim to promote accurate coding and reduce improper payments. They also help healthcare providers identify potential billing risks before they turn into audits.
In medical coding, what is a CBR? CBRs are not audits. Instead, Medicare intends them to be informational and proactive, giving practices a chance to review and improve their billing behaviors voluntarily.
Who Receives Comparative Billing Reports?
Medicare sends CBRs to:
- Physicians and non-physician practitioners
- Medical clinics and group practices
- Hospitals and outpatient facilities
- Durable Medical Equipment (DME) suppliers
- Laboratories and specialty providers
In general, Medicare issues reports when a provider’s billing data shows unusual patterns compared to others in the same specialty or geographic area.
What Information Is Included in a CBR?
For example, a Comparative Billing Report typically includes:
- Commonly reported CPT® and HCPCS codes
- Frequency of services billed
- National, state, and peer comparison data
- Graphs showing where the provider falls in relation to peers
- Educational resources and documentation recommendations
In addition, many CBRs focus on high-risk services such as E/M services, DME supplies, lab testing, and high-utilization procedures.
Why CBRs Matter in Medical Coding
As a result, CBRs help coders and billers:
- Spot overuse or underuse of certain CPT®/HCPCS codes
- Identify documentation gaps
- Confirm that coding aligns with national guidelines
- Reduce the chance of Medicare audits or recoupments
- Strengthen internal compliance programs as well
However, consistent outlier billing patterns, if left uncorrected, can increase the risk of a Targeted Probe and Educate (TPE) review or more serious audits.
How Medical Coders Should Respond to a CBR
When a practice receives a CBR, medical coding and billing teams should:
- Review frequently reported codes in the report
- Then compare medical record documentation with billed services
- Also confirm correct levels of E/M services
- Ensure that coders use modifiers correctly
- Check medical necessity and diagnosis-to-procedure linkage
- Finally, perform internal audits on similar claims
Overall, this proactive approach helps prevent future payment denials and compliance issues.
Common Services Flagged in CBRs
In particular, CBRs often focus on:
- High-level E/M services
- Modifier -25 usage
- DME items and supplies
- Laboratory panels
- Physical therapy and rehabilitation services
- Injection and infusion services
CBRs target these areas because of historically high improper payment risks.
How CBRs Help Prevent Audits
Although they are not audits, CBRs function as an early warning system. Therefore, providers who review and correct their billing after receiving a CBR can greatly reduce the chance of:
- Medicare overpayment demands
- Recovery Audit Contractor (RAC) reviews
- Zone Program Integrity Contractor (ZPIC/UPIC) investigations
Key Takeaways for Medical Coders
In summary, Comparative Billing Reports are valuable tools that help coders:
- Improve coding accuracy
- Strengthen documentation practices
- Support compliant reimbursement
- Also protect providers from future audits
Rather than fear a CBR, coders should view it as a chance to reinforce best practices and elevate compliance standards.
Frequently Asked Questions About Comparative Billing Reports
Is a CBR an audit?
No. A CBR is educational. It does not mean a provider did anything wrong, and no response is required.
Why would a provider receive a CBR?
CMS sends CBRs on a selected topic, such as a specific E/M level, procedure or DME item, to providers whose billing for that topic differs significantly from their peers.
What should a practice do after receiving a CBR?
Review the data, pull a sample of claims for the service and confirm the documentation supports the codes billed. Correct any errors and educate providers and coders where needed.
Can a CBR lead to an audit later?
The report itself does not start an audit, but billing patterns that stay far from peers can attract review from Medicare contractors. Acting on a CBR early lowers that risk.
How do coders use CBR data?
Coders and auditors use it to target internal audits, focusing on the services where billing patterns stand out. See our guide to becoming a medical coding auditor.