How to Compare Billing Services for Fewer Denials

Learn how to evaluate outsourced billing services for denial prevention, including the key metrics, questions to ask, and what Oncology practices specifically need.

By Lemuel Areglo, CPC | Director of Revenue Cycle Management Services

Key Takeaways

  • Effective denial prevention in oncology begins at the point of patient intake. Ensure your billing partners verify eligibility and documentation accuracy from the outset.
  • Monitor key performance indicators such as clean claim rates, denial rates, and days in accounts receivable to objectively assess the performance of your billing partner.
  • Oncology practices require billing services tailored to their unique documentation needs, rather than generic solutions designed for primary care.
  • Seamless integration between your electronic health record (EHR) and billing systems can significantly reduce manual entry errors that lead to denials.
Claim denials can be more costly than the revenue they represent. Each denied claim incurs additional staff time spent on identifying issues, correcting documentation, and resubmitting claims. In oncology, where a single treatment can represent substantial reimbursement, the financial implications can escalate rapidly.
When considering outsourcing your billing, the key question is: how effectively does the partner prevent denials before they occur?
This guide outlines what to evaluate, which metrics to track, and the critical questions to ask potential billing partners.

Table of Contents

Understanding Oncology-Specific Denial Risks

Oncology billing presents unique challenges that differ significantly from general primary care workflows. Treatments such as chemotherapy, radiation therapy, and surgical interventions each have specific documentation requirements, medical necessity standards, and payer-specific regulations.
A billing professional unfamiliar with oncology-specific coding nuances may generate denials that a knowledgeable oncology coder would catch prior to submission. This knowledge gap often becomes apparent only after denials start to accumulate.
The administrative burden of managing claim denials detracts from your practice’s ability to focus on patient care and operational efficiency. Preventing denials is far less costly than addressing them post-factum.

Common Sources of Claim Denials in Oncology

To effectively evaluate a billing partner’s capabilities, it is essential to understand the common origins of claim denials in oncology.

Eligibility and Coverage Failures

Claims submitted with outdated insurance information or inactive coverage are often denied automatically. Manual verification processes frequently overlook changes that occur between scheduling and the appointment date, making this one of the most preventable and prevalent denial categories.

Coding and Modifier Errors

Oncology procedures often require specific code combinations and modifiers that differ from standard practices. Incorrect modifier usage, unbundling errors, and outdated code selections frequently trigger denials. Your billing partner’s coders must possess a deep understanding of oncology coding, not just general coding knowledge.

Documentation Lacking Medical Necessity

Payers often deny claims when clinical documentation fails to demonstrate the necessity of a procedure. This issue arises most frequently when billing systems are not integrated with clinical workflows, leading to discrepancies between provider documentation and what is submitted for billing.

Prior Authorization Gaps

Missing or expired authorizations account for a significant portion of oncology practice denials. Keeping track of authorization requirements, expiration dates, and payer-specific rules demands consistent attention that many internal billing teams find challenging to manage alongside their other responsibilities.

Evaluating Billing Partners for Oncology Practices

When assessing potential billing partners, inquire about their denial prevention processes and seek concrete examples of their effectiveness.

Front-End Verification

The most effective denial prevention occurs before a claim is generated. Confirm whether the billing service verifies insurance eligibility, checks prior authorization status, and identifies documentation issues prior to service delivery. Real-time eligibility verification at scheduling allows for issues to be resolved before the appointment, rather than discovering them afterward.

Oncology-Specific Coding Expertise

Inquire whether dedicated coders with oncology experience handle your claims and how they stay updated on relevant coding changes. A billing service with true oncology expertise will confidently discuss common coding challenges specific to your specialty. Vague responses may indicate a lack of familiarity.

Documentation Review Before Submission

Billing services that review clinical documentation prior to claim submission can identify medical necessity issues that would otherwise lead to denials. Ask how they flag documentation gaps and how they communicate with your clinical team to resolve these issues.

Automated Claim Scrubbing

Rules-based claim scrubbing can catch errors that human review might miss. Inquire whether the billing partner’s scrubbing rules are regularly updated and whether they include payer-specific edits. Given the frequent changes in payer requirements, outdated rules can create a false sense of security.

Metrics That Indicate Billing Partner Performance

Do not rely solely on a vendor’s marketing claims to evaluate their performance. Request specific metrics and hold them accountable to established benchmarks.

Clean claim rate

This metric measures the percentage of claims accepted by payers upon first submission. Industry standards typically aim for a clean claim rate exceeding 95%. Request the vendor’s average clean claim rate specifically for oncology clients, rather than their overall average.

Denial rate

This metric tracks the percentage of claims that payers deny after initial acceptance. Inquire about denial rate trends over time; a billing service actively focused on prevention will demonstrate improving rates, while stagnant or worsening trends may indicate reactive rather than proactive processes.

Days in Accounts Receivable

This metric measures the duration claims remain unpaid from the date of service until payment is received. Oncology practices often experience longer accounts receivable cycles due to authorization requirements and complex claim adjudication processes. Request days in accounts receivable data specific to oncology clients, rather than the vendor’s overall average.

Denial Appeal Success Rate

When denials occur, it is crucial to know how often the billing partner successfully recovers that revenue. A high appeal success rate indicates a strong understanding of payer requirements and documentation standards, while a low rate may suggest inadequate follow-through or insufficient specialty knowledge.

The Importance of EHR Integration in Oncology Billing

The integration between your clinical systems and billing workflows is critical in minimizing errors.
When data must be manually transferred between systems, errors are likely to occur. A procedure may be coded from memory instead of actual documentation, modifiers may be overlooked, or charges may be omitted. Each of these scenarios can lead to preventable denials.

When your EHR and billing platform are integrated, charges are captured as documentation is completed. Coding accurately reflects what was documented, allowing billing teams to review clinical notes in context rather than relying on extracted data. This reduces assumptions and minimizes the need for clarifying questions that can delay submission.

Additionally, Bidirectional integration is crucial. If a billing team identifies a documentation issue, providers should be able to address it within their standard charting workflow, rather than through a separate communication channel that adds unnecessary steps and delays.

Questions to Ask When Evaluating Oncology Billing Vendors

Prepare targeted questions prior to your evaluation discussions. The way a vendor responds can reveal more than the content of their answers.

On Denial Prevention:

  • What is your current denial rate, and how has it trended over the past year?
  • How do you verify eligibility before services are rendered?
  • What procedures do you follow when documentation does not support the procedure code?
  • How do you track prior authorization requirements and expiration dates?

On Oncology-Specific Expertise:

  • How many oncology practices do you currently serve?
  • Which coders will handle our claims, and what is their background in oncology coding?
  • What common coding challenges do you encounter in oncology practices, and how do you address them?

On Reporting and Transparency:

  • What reports do you provide, and how frequently are they delivered?
  • Can I review a sample report from a current oncology client?
  • How do you notify practices when denial trends worsen?
  • Will I have access to real-time billing data?

Identifying Red Flags

Be aware of warning signs that may indicate a billing service will not effectively manage denial prevention.
  1. A vendor unable to provide specific performance metrics likely lacks the necessary tracking systems to manage denials effectively. Vague claims about “low denial rates” without supporting data are insufficient.
  2. If a billing service cannot connect you with references from oncology clients, their experience may not align with your practice’s needs.
  3. Manual data transfer between your EHR and the billing service poses a structural risk. If integration is lacking or requires extensive workarounds, preventable denials will persist, regardless of the capabilities of their coders.
  4. Billing partners focused on prevention will proactively reach out before issues escalate. If a service only contacts you after collections decline or a denial trend has already emerged, their processes may lack the essential front-end controls.

Structuring Your Evaluation Process

Implementing a structured evaluation process allows for objective comparisons between vendors, minimizing the influence of persuasive sales pitches.
  1. Begin by assessing the unique needs of your oncology practice: treatment volumes, prevalent denial reasons, current challenges, and integration necessities with existing systems. This foundational understanding will facilitate effective comparisons.
  2. Request that vendors tailor their proposals to your specific oncology requirements rather than providing generic options. Their responsiveness to your needs can indicate their potential as a collaborative partner.
  3. Arrange demonstration sessions to observe their systems and processes in action. Inquire about scenarios pertinent to oncology practices, such as prior authorization tracking, documentation assessments, and workflows for managing denials.
  4. Consult with current oncology clients before finalizing your decision. Directly ask about improvements in denial rates, the quality of communication, and any challenges encountered during implementation.
  5. Carefully review contract terms. Reputable billing partners will commit to performance standards and provide clear exit strategies if those standards are not met.

The Role of Internal Processes in Billing Success

Even with an effective billing partner, your internal processes significantly influence denial rates. Front-office staff are the first line of defense in ensuring claim accuracy. It is essential to train your team on eligibility verification, accurate demographic data collection, and thorough documentation for prior authorizations.

Establish robust communication channels with your billing partner to ensure that coding inquiries and documentation challenges are addressed promptly. Regularly review billing reports, even during stable collection periods. Monitoring denial rate trends by category and payer can often reveal issues before they impact cash flow.

Clinical documentation standards are critical in oncology. When providers consistently document the necessary details to support the treatments performed, denial rates decrease, and the success rates of appeals improve.

Evaluating Your Billing Partner's Effectiveness

While cost is a consideration, it should not be the primary factor. A billing service that may charge slightly more but results in significantly lower denial rates and a quicker accounts receivable cycle will typically yield better financial outcomes for your oncology practice.
Assess potential partners based on metrics that truly reflect performance: clean claim rates, denial rates, days in accounts receivable, and appeal success rates. Pose specific questions regarding oncology coding expertise and EHR integration capabilities. Seek references from practices similar to yours for a comprehensive evaluation.
The right billing partner can help prevent denials before they occur. This aspect is crucial during the evaluation phase, as rectifying issues post-contract can be challenging and costly.

See what your billing is actually costing you. Obtain a clear comparison of your current performance against a comprehensive billing model.

Lemuel Areglo, CPC

is the Director of Revenue Cycle Management Services at WRS Health, bringing nearly 15 years of experience in medical billing, coding, credentialing, and revenue cycle operations across the healthcare sector. His expertise encompasses the entire revenue cycle, including claims management, denial resolution, payment posting, accounts receivable, and practice operations. He has extensive experience supporting various specialties, including oncology, psychiatry, physical therapy, pain management, internal medicine, orthopedic surgery, speech therapy, and sleep medicine.

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