A denied claim is always more than a delayed payment. Behind every claim denial lies a sequence of effort, delay, and revenue loss that the average organization simply does not account for. When finance executives factor in all the true costs associated with claim denials, they often find that the sum of the costs is many multiples higher than the dollar amount of the remittance adjustment.

This is because claim denials tend to slip beneath the radar. The claim itself appears in a report. The coder's effort, the phone calls for follow-up by the biller, the letter of appeal, the extra 60 days in accounts receivable, and ultimately the write-off, get spread out across departments and budgets. Nobody tracks the whole thing, so the cost of claim denials is chronically underestimated.

In 2026, this underestimation is costly. Increasing payer scrutiny, prior authorization changes, and narrow margins for hospitals and physician practices combine to make this an important year for addressing claims denials. This article breaks down every layer of the cost of claim denials and reveals how coding accuracy affects that calculation.

The 2026 Denial Landscape

Denials are not a niche issue. Initial denial rates in the healthcare industry through 2024 and 2025 are expected to average about 10 percent to 12 percent of claims, and the direction of the trend line in this time span has been increasing, not decreasing. In Experian Health’s State of Claims 2025 survey, about 41% of providers reported denial rates of 10% or higher. Denials from Medicare Advantage and commercial payers were on the rise.

Several 2026 developments shape the cost of claim denials this year:

• CMS Interoperability and Prior Authorization Final Rule (CMS-0057-F). As of January 1, 2026, Medicare Advantage organizations and Medicaid and CHIP programs must issue prior authorization decisions within 72 hours for expedited requests and 7 calendar days for standard requests, and all impacted payers, including QHP issuers on the federal exchanges, must give a specific reason for each denial. Required prior authorization APIs follow starting January 1, 2027.
• WISeR Model. CMS launched the Wasteful and Inappropriate Service Reduction (WISeR) Model on January 1, 2026, adding technology-assisted prior authorization for selected services in Original Medicare in six states: Arizona, New Jersey, Ohio, Oklahoma, Texas, and Washington
• Code set updates. FY 2026 ICD-10-CM/PCS codes became effective as of October 1, 2025, and CPT 2026 codes became effective on January 1, 2026. Quarterly updates to the NCCI edits detect out-of-date code combinations and modifiers.

Each change creates new opportunities for mismatches between documentation, codes, and payer rules. More mismatches mean more denials and a higher cost of claim denials across the revenue cycle.

Layer 1: Claim Rework Cost

Most obvious among the costs associated with claim denials is the cost of repairing the denied claims and resubmitting them. As per industry standards, it is estimated that the average cost associated with claim repairs stands at around $25 per claim in the case of physicians and $118 per claim in hospitals. According to the surveys conducted by Premier Inc., hospitals incurred a total estimated expenditure of $25.7 billion on claims adjudication in the year 2023, and the average cost of contesting a denied claim increased to around $57 per claim.

Those figures cover the core steps every denial demands:

1. Interpretation of Remittance Advice and Understanding the CARC and RARC Codes.
2. Taking up the chart and matching the documents with the codes billed.
3. Coding correction, modifying codes, demographics, or securing an authorization.
4. Submitting the appeal letter, maybe for two or three tiers.
5. Following up on the claim until it is settled.

Such complex denials may involve hours of clinical and coding reviews. Multiply an average of $57 by the number of denials each month, and cost due to rework alone can be substantial. But rework is just the tip of the iceberg as far as costs associated with denials.

Layer 2: Revenue Leakage and Write-Offs

The biggest component of the cost of denials comes from payments that were never received. Industry studies and Change Healthcare’s ongoing denials analysis have determined that as much as 60% of denied claims are never resubmitted. People run out of time to do it, they don’t see enough value in chasing a small denied payment, or they miss the deadline for timely filing.

There are other ways in which revenue leakage happens, though:

• Underpayments that sneak through due to the lack of a check against the contract.
• Partial denials per line item that get processed instead of being appealed.
• Downcoding by payers that lowers reimbursements without an actual denial.
• Charge leaks due to inadequate documentation or coding.

Eventually, the denials become write-offs. HFMA MAP Keys track initial denial write-offs as a percentage of net patient revenue, and a commonly cited target for high performers is below 1%. There are many organizations that are performing well above that threshold. For a health system earning net patient revenues worth $500 million, every extra percentage point becomes another $5 million down the drain.

What makes the problem frustrating is that most of the write-offs could have been avoided. Research conducted by organizations like the Advisory Board and Change Healthcare has shown for many years now that approximately two-thirds or more of the denials are preventable, and many of the denied claims that are appealed end up being reversed.

Layer 3: Cost to Collect and Cash Flow

Cost to collect represents the cost incurred in managing revenue cycle activities as a percentage of the cash generated. As per the HFMA standard, cost to collect is defined as the ratio of total revenue cycle cost to total patient service cash collections. It usually ranges between 2% and 4%, where the best performers have lower values.

Denials lead to increases in cost to collect in two ways simultaneously. First, the numerator increases due to additional hours, denial management software costs, clearinghouse costs, and occasionally vendor costs due to denials. Second, the denominator is reduced because denied amounts are either collected late or not collected at all. A practice collecting the same amount of money but twice as many denials will definitely experience increased cost to collect.

Additionally, denials impact the speed with which money comes in. An undenied claim usually takes between 14 and 30 days to be paid. On the other hand, an appealed claim will take 60, 90, or even 120 days before payment is made. This increases the number of days in accounts receivable, locks up funds that could otherwise have been used for operational processes, and may push companies to borrow more money.

To the finance department, one of the most straightforward ways of quantifying the cost of claim denials is tracking the cost of collection due to denials.

Layer 4: The Hidden Costs

Some of the costs associated with claim denials may not appear in a financial statement, but it nevertheless drains the organization of resources.

Staff burnout and staff turnover. Coders and billing personnel who spend most of their day resolving similar denials become frustrated. Experienced coding professionals remain in short supply in 2026, and replacing one is costly in recruiting, onboarding, and lost productivity.

Patient experience. In the event of a claim denial, the patient gets misleading letters or bills, which builds mistrust, increases the number of calls, and eventually leads to bad debt.

Clinical time. The physician and nursing staff spend valuable time in performing peer reviews and answering documentation questions.

Compliance exposure. A recurring series of coding errors on the same lines of service could result in payers performing an audit of the service, a RAC review, or a TPE review by Medicare Administrative Contractors. Upcoding in such a pattern presents a significant legal exposure.

Lost strategic focus. Revenue cycle managers who find themselves constantly firefighting denials have no energy left to focus on payer contracts, expanding their service lines, or upgrading technology.

Worked Example: Calculating Your Cost of Claim Denials

A hypothetical mid-sized physician group submitting 10,000 claims a month can lose about $1.5 million a year to denials. The assumptions below are illustrative; swap in your own numbers.

The simple formula behind the table:

Denial cost = (Denied dollars never recovered) + (Reworked claims × Rework cost per claim)

This estimate still leaves out delayed cash, staff turnover, and compliance risk. Even so, cutting the denial rate from 10% to 5% would save this group roughly $750,000 a year. That is why the most effective way to lower the cost of claim denials is to stop denials before claims leave the building.

Where Denials Start: Coding and Documentation Gaps

Front-end registration and eligibility issues continue to be among the top denial reasons, although many of the high-dollar denials have coding and documentation issues as their root cause. Some of the common coding root causes are:

• Outdated codes as of FY 2026 ICD-10-CM and CPT 2026 updates.
• Failure to use specific codes (i.e., using unspecified codes when a more specific code is supported).
• Diagnosis-procedure mismatch that violates payer medical necessity criteria like Medicare NCDs/LCDs.
• Incorrect application of NCCI edits and modifiers (e.g., modifier 25 or 59).
• Documentation that doesn’t support the service level, particularly for E/M encounters.
• Absence of prior authorization for procedures covered under the WISeR model.

This is because fixing such errors typically involves clinical assessment. It takes only a minute or two to correct a demographic mistake, but it may take hours to correct an error regarding the denial of medical necessity.

How to Reduce the Cost of Claim Denials

Prevention is much cheaper than rework. There is a certain set of steps companies take to reduce the costs associated with denied claims:

1. Root cause denial analysis should be conducted, which includes measuring initial denial rate, denial write-offs as a percent of net revenue, claim rework cost, and cost to collect, split by payer, service line, and CARC code.
2. Problems must be solved at the source of occurrence. Denial trends should be passed on to registration, CDI, and coding departments to ensure that the same mistake will not happen again.
3. All claims need to be scrubbed before being submitted, checking codes for accuracy, according to current ICD-10-CM, CPT, HCPCS, NCCI edits, and payer policy.
4. Prior authorization checks for procedures subject to CMS-0057-F timeframes and the WISeR model should be automated.
5. Prioritization of appeals in terms of value and chances of winning.

How RapidClaims Helps

RapidClaims utilizes artificial intelligence technology right from the point where most denials originate – coding. The solution analyzes clinical records and assigns proper codes for the claim, identifies any deficiencies that may occur, and does this all prior to actually filing the claim. As a result of pre-filing review of claims based on the current code set, edits, and payer policies, RapidClaims assists in minimizing claim rework costs, identifying areas of revenue leakage, and reducing unnecessary write-offs.

Coders become more productive, spending less time correcting mistakes and more time on difficult tasks. Revenue cycle management professionals receive information on the reasons for denials, grouped by payers and specialties.

The Bottom Line

The real cost of denial is the combination of the cost of rework, delays in getting paid, revenue leakage, write-offs, an increased cost of collection, and the hidden cost of impacts on employees, patients, and compliance. For many organizations, that total runs into millions of dollars a year, and much of it is preventable.

By 2026, with new prior authorization requirements, new code sets, and a stricter payer review process, not addressing denials proactively will be the most costly approach available. Ensuring proper coding on the front end will be the quickest way to reduce the cost of claim denials.

FAQs

1. What is the average cost of claim denials per claim?

Widely cited benchmarks put claim rework cost at about $25 per claim for physician practices and about $118 per claim for hospitals. Premier’s surveys found the average cost to contest a denied claim reached roughly $57 in 2023. The full cost of claim denials is higher once lost revenue, write-offs, and delayed cash are included.

2. What factors make up the total cost of claim denials?

The total cost of claim denials includes direct claim rework costs (staff time, appeals, technology), revenue leakage from claims never resubmitted, permanent write-offs, and a higher cost to collect. Hidden costs such as staff burnout, patient dissatisfaction, and audit risk add to the total.

3. How do I calculate the cost of claim denials for my organization?

Start with denied dollars that were never recovered, then add the number of reworked claims multiplied by your rework cost per claim. Track the result by payer, service line, and denial reason code. For a fuller picture, add the cost of delayed cash and the denial-driven share of your cost to collect.

4. How much of the cost of claim denials is preventable?

Industry analyses have long estimated that roughly two-thirds or more of denials are preventable. Many stem from eligibility errors, missing prior authorizations, and coding or documentation gaps. Catching these before submission avoids both rework and write-offs.

5. How can AI coding reduce the cost of claim denials?

AI-assisted coding reviews documentation, suggests accurate and specific codes, and flags edit conflicts or missing information before a claim is submitted. Platforms like RapidClaims help raise first-pass acceptance, cut claim rework cost, and limit revenue leakage, which lowers the overall cost of claim denials.