How Oncology Billing Services Can Help in Underpayment Recovery in Cancer Care 

Cancer care can be quite tumultuous for everyone involved, be it the patient or the provider. The reason behind this is the clinical complexity, emotional toll, and the financial uncertainty that comes with it.

For instance, a single plan of treatment can involve several different physician visits, chemotherapy administration, biologic drugs, supportive medications, laboratory testing and supportive services. Therefore, a practice must be capable enough to handle all these details without any lapses.

Then again, this sounds easier than it actually is. Keeping track of every minute detail can be quite challenging to say the least. As a result, the path of least friction is to look towards professional oncology billing services.

These professional services are great at streamlining revenue cycle management to combat financial roadblocks such as denial or payment, delay of payment and most importantly underpayments. Let’s find out how.

Why Underpayment Recovery Matters in Cancer Care

Underpayments are not usually given much thought by providers. The reason is that most providers have systems that are geared towards flagging delayed and denied payments, but nothing to flag underpayments. As a result, underpayments can fly under the very nose of providers for weeks, or months.

Another important reason why underpayment of recovery matters is that cancer care claims are rarely low in value. In fact, according to the National Cancer Institute, national cancer-attributed medical care costs were estimated at $190.2 billion in 2015 and projected to reach $208.9 billion in 2020 because of population growth and ageing.

Therefore, cancer care claims are certainly not cheap. Hence, even if a small percentage of the said claims is missed, the financial impact can be grave. As a result, paving the way for proper underpayment recovery planning.

Why Oncology Claims Are Vulnerable to Underpayment

Oncology claims are especially vulnerable because these claims come with clinical complexity and strict payer scrutiny. As a result, it is highly probable for billers to miss out on certain elements. Therefore, making oncology claims more vulnerable to underpayment. Here is a detailed rundown of the same:

1) High-Cost Drugs and Unit-Level Errors

Drug billing is one of the riskiest areas of oncology billing. Many oncology practices follow a buy-and-bill model. Under such buy-and-bill model, the practice purchases the drug, administers it to the patient and subsequently seeks reimbursement from the payer. As a result, if the claim messes up details like J-code, NDC, dosage, unit count, or wastage amount, the reimbursed amount might be lower than the expected amount.

This is especially common in targeted therapy drugs, immunotherapy, and biologics. A small unit mismatch can create a meaningful shortfall. For instance, if administered units are not supported by nursing documentation or if the payer interprets the billed units differently from the practice, the payment may fall below expectation. Without payment variance review, this could remain unnoticed.

2) Infusion Timing, Modifiers, and Documentation Gaps

Infusion billing depends heavily on start and stop times, service sequencing, initial versus subsequent infusion logic, and supporting documentation. Infusion timing and sequencing play a central role in oncology reimbursement, and weak documentation can affect how services are paid.

Modifiers are another source of underpayment. In oncology, modifiers may support separate evaluation and management services, drug wastage, technical or professional components, or distinct procedural services. Therefore, wrong or missing modifier can compel payers to bundle, reduce or downcode the claim.

3) Prior Authorization and Medical Necessity Issues

In oncology, prior authorization problems are generally associated with denials and payment delays. However, they may also contribute to reduced reimbursement when only part of a treatment plan or a limited number of units has been authorized.

Cancer treatment plans might change at a drop of a hat or quite frequently. Hence, if authorization records, clinical notes, and billed services do not align, payment may be reduced or delayed.

Even though prior authorization is central and must be obtained before treatment when required.  Physicians continue to face a high administrative burden from prior authorization requirements, with reported delays and heavy staff involvement. In oncology, that burden is amplified because many treatments are high cost and require payer reviews before the service is delivered.

How Specialized Billing Support Finds Hidden Revenue

Underpayment recovery is not guesswork. It requires a disciplined comparison between what was paid and what should have been paid. Strong billing teams look beyond simple denial work queues and review paid claims for variance.

1) Payment Variance Review

One major function of oncology billing services is payment variance analysis. This means comparing the payer’s actual reimbursement against expected reimbursement. The review may include contracted fee schedules, payer policy rules, Medicare allowable amounts, drug pricing logic, bundled services, modifiers, and patient responsibility.

A paid claim should not automatically be considered a correct claim. For example, an additional infusion hour may be omitted during charge capture, denied because of inadequate documentation, or underpaid despite being billed correctly. The billing team must identify which of these scenarios occurred before initiating recovery.

2) Contract and Fee Schedule Matching

Underpayments often happen because the payer system applies the wrong rate, an outdated contract, a different fee schedule, or a payer policy that conflicts with the provider’s agreement. The caveat is that the general billing teams may not have time to investigate these payment details. Specialized teams usually build expected reimbursement models and compare them against ERAs.

This is valuable in cancer care because claims often contain multiple line items. If a payer reduces only one line, the total payment may look close enough to escape attention. However, when this happens across hundreds of infusion visits, the loss becomes material.

3) Drug Wastage and Modifier Audits

Drug wastage recovery deserves special attention. Oncology drugs are often supplied in single-dose vials, and a patient’s dose does not always match the vial size exactly. When documentation supports discarded amounts and reporting rules are met, the practice may be entitled to reimbursement for the discarded portion, depending on payer policy.

A proper audit checks whether the administered dose, wasted amount, vial size, HCPCS units, NDC, and modifiers all match. This is not only a payment issue. It also supports compliance and audit readiness, especially because CMS has formal requirements around discarded drug reporting.

The Underpayment Recovery Workflow

A practical underpayment recovery process has four stages: detect, validate, appeal, and prevent. Each stage matters because simply finding a short payment is not enough. The practice must also prove it, recover it, and stop the problem from repeating.

• Detect: In this stage, the billing team must review adjudicated claims, particularly high-dollar drug and infusion claims, for payment variances. The goal should be to find any form of underpayment in recent claims that have been processed.
• Validate: Validation confirms whether the variance is truly an underpayment. The billing team reviews the contract, payer policy, coding, clinical documentation, authorization, and payment explanation. This step prevents unnecessary appeals and protects compliance.
• Appeal and Follow Up: In case the team does manage to pinpoint underpayment, they can then create a proper workflow to appeal and follow up on underpaid claims in order to recover the lost revenue.
• Prevent Recurrence: The final step is to create a prevention plan that not only understands older underpayments but also creates a system that can take care of future claims and keep the practice financially stable.

Assessing a Billing Partner: Where We Fit In?

In the end, the most important way to combat underpayment is to rope in the capable oncology billing services, and not just any biller. This is where most providers make their biggest mistake, pick the most affordable one. Yes, it might save some money at the beginning, but it is certainly a band-aid solution that will eventually falter.

Hence, the high road is to bring in an experienced oncology billing partner like SunKnowledge. We not only offer specialized oncology-based RCM services but have 15 years of operational expertise to back up this endeavor. Therefore, making us well equipped to handle specialized oncology RCM roadblocks.

The best part? We offer all our services at a flat fee model. Therefore, providers need not worry about surging prices or any other financial surprises down the line.