A Complete Guide to AR and Denial Management

Key Takeaways

• Most healthcare organizations have a denial problem they're managing like a billing problem. The distinction matters: a denied claim isn't a one-time process error; it's a signal that something broke upstream, often well before the claim was ever submitted.
• 41% of providers now face denial rates of 10% or higher, a figure that has grown year over year since 2022. Initial denial rates hit 11.8% in 2024, up from 10.2% in prior years. 
• The top causes of denials, including missing patient data, coding errors, and eligibility and authorization failures, are all front-end failures that surface post-service. Reactive denial management alone will never fully resolve them.
• Effective AR and denial management requires a prevention-first model backed by structured appeal workflows, real-time tracking, and dedicated recovery effort for high-aging AR. Practices that build this infrastructure see measurable improvement in clean claim ratios, denial rates, and overall collections.

Most healthcare organizations have a denial problem they’re treating like a billing problem. That distinction matters.

A billing problem is a process error. A denial problem is a system-wide failure, one that starts long before a claim hits a payer’s system and compounds quietly until it shows up as aging AR, eroding cash flow, and write-offs that didn’t have to happen.

This guide breaks down what AR and denial management actually involves, where the failure points are, and what an effective recovery-and-prevention model looks like for providers and payers alike.

What Is AR and Denial Management in Healthcare?

Accounts receivable (AR) management refers to tracking and collecting all outstanding payments owed to a healthcare organization, from both payers and patients. Denial management is the process of identifying, appealing, and resolving claims that payers have rejected, and preventing those rejections in future cycles.

The two are deeply connected. A denied claim that isn’t appealed and resolved correctly flows directly into aging AR. And aging AR that doesn't work actively turns into revenue you’ll never collect.

Together, they represent one of the most financially significant functions in the revenue cycle — and one of the most under-resourced.

The Scale of the Problem

The data from 2025 confirms what RCM leaders have been experiencing operationally.

According to Experian Health’s 2025 State of Claims report, 41% of providers now face denial rates of 10% or higher, up from 30% in 2022. Initial claim denials hit 11.8% in 2024, compared to 10.2% four years earlier. 

The financial consequences are concrete. MDaudit’s 2025 analysis of over 1.2 million providers found that the average denied inpatient claim amount rose 14% year over year, and outpatient denied amounts climbed 12%. Payer audits are up 30% in at-risk amounts per customer.

This isn’t a cyclical trend. It’s a structural shift in how payers are processing and contesting claims, and it requires a structural response from providers and health plans.

Why Denials Keep Happening: Root Causes

A denial is not an isolated event. It’s a signal. And most of the time, it points upstream.

The top three causes of claim denials have remained consistent year over year: missing or inaccurate patient data, coding errors, and eligibility and authorization failures. These are all front-end problems that surface post-service, which is why reactive denial management alone will never fully solve them.

Breaking this down across the revenue cycle:

Pre-service Failures

Eligibility not verified before the encounter, prior authorizations missed or not obtained in time, and demographic entry errors at scheduling. These create denials weeks later, when the opportunity to fix them cleanly has passed.

During-service Failures

ICD-10 and CPT coding inaccuracies, insufficient clinical documentation to support the level of service billed, and HCC coding gaps that affect risk adjustment reimbursement, particularly for Medicare Advantage and value-based contracts.

Post-service Failures

Claims submitted with incomplete information, payment posting errors that distort AR visibility, and denials that age without a structured appeal workflow. A denial that sits unworked for 30 days has already lost part of its recoverable value.

For health plans and TPAs, the root causes look slightly different, overpayments due to incorrect benefit adjudication, duplicate claims, coordination of benefits failures, and inconsistent medical necessity criteria, but the cost of getting it wrong is equally significant.

The AR Aging Problem

Days in AR is one of the clearest indicators of RCM health. Industry benchmarks in 2025 place the target at 30 days or less for most practices. High-performing organizations operate under 30. Once AR exceeds 50 days, the probability of recovery drops substantially.

The danger isn’t just cash flow. It’s visibility. When AR ages without resolution, it creates a distorted picture of financial performance. Claims that look “in process” may already be headed for write-off. Leadership sees a clean-claim figure on the dashboard while collections quietly degrade in the background.

Effective AR management requires working claims at every aging bucket, not just the most recent ones. Legacy AR, those claims sitting at 90+ days, often contains recoverable revenue that gets abandoned because the team is focused on the current cycle.

For payers and TPAs, unresolved AR manifests as float risk, regulatory exposure under prompt pay laws, and audit vulnerability. The principle is the same from both directions: outstanding balances need to be resolved accurately and fast.

What Effective Denial Management Looks Like

A structured denial management program isn’t a team chasing rejections. It’s a system designed to prevent denials first, and recover them fast when they happen anyway.

Prevention

Clean-claim submission starts with eligibility verification at least 48 hours before the encounter and not at the front desk on the day of service. It includes coding review processes, prior authorization workflows with defined turnaround expectations, and documentation standards that support medical necessity. High-performing practices maintain denial rates below 5%; the best operate closer to 2–3%.

Early Identification

Real-time claim scrubbing catches errors before submission. Denial trends tracked by payer, CPT code, and denial reason code help identify patterns before they compound. According to a survey, 69% of providers using AI for denial management reported reduced denials and improved resubmission success.

Structured Appeal Workflows

When a denial comes in, it needs to enter a defined process, root cause coded, priority assigned, appeal submitted within the payer’s window. Many providers lose recoverable revenue not because the denial was valid, but because the appeal deadline passed before anyone picked it up.

Legacy AR Recovery

High-aging AR buckets require a dedicated recovery effort. Claims beyond 90 days often need a combination of clinical documentation review, payer escalation, and in some cases, coordination with compliance teams.

Key Metrics Every RCM Team Should Track

Whether you’re running an internal RCM team or evaluating an outsourced partner, these are the numbers that matter:

• Initial denial rate: target below 5%, benchmarked against your payer mix and specialty.
• Days in AR: under 35 days for most practices; under 30 for high-performers.
• First-pass resolution rate (FPRR) — how many claims get paid on first submission; target above 95%.
• Appeal overturn rate: how many denied claims get reversed on appeal. A rate below 50% warrants a review of documentation practices.
• Net collection rate: total collected versus total collectible. This is the bottom-line metric for overall RCM health.
• Legacy AR percentage: the proportion of AR over 90 days old; high-performers keep this below 10–12%. 

The metrics above don't change based on who you are in the claims ecosystem, but what you're optimizing for does.

The Provider and Payer Perspective

AR and denial management looks different depending on which side of the claim you’re on, but the financial stakes are the same.

For providers, physician groups, hospitals, specialty practices, and health systems, the core concern is maximizing first-pass claim acceptance and recovering every denied dollar that can be appealed. Lost revenue here directly affects staffing capacity, capital investment, and care delivery.

For health plans and TPAs, the concern runs in the opposite direction: accurate adjudication, overpayment prevention, and audit readiness. Payer-side AR challenges include unrecouped overpayments, COB errors, and compliance exposure under CMS and state prompt pay requirements. A health plan that lets AR accumulate on the overpayment side is equally exposed as a provider sitting on uncollected claims.

This dual-sided challenge is what we built our AR and denial management practice around, and it shapes how we approach every engagement.

HOM operates on both sides of this equation, bringing the same revenue integrity discipline to provider billing and payer-side claims operations.

How We Approach AR and Denial Management

For close to 10 years, we have managed AR and denial management as part of end-to-end revenue cycle operations for physician groups, health systems, and health plans across the United States.

The results are specific. We consistently maintain a Net Collection Ratio of 96–98% through disciplined AR management and timely payer follow-up. Our engagements have delivered up to 35% reduction in 90+ day AR within the first six months, up to 25% improvement in overall collections, and up to 18% reduction in denial rate through structured root cause analysis and proactive follow-up workflows.

Our denial recovery rate reaches up to 95%, with legacy AR maintained below 12%. The first-pass claim ratio across our billing operations reaches up to 97%, which means the majority of claims go through clean on the first submission, reducing denial volume before it compounds.

These outcomes come from a model that pairs technology with experienced RCM specialists. Claim scrubbing and denial trend analysis run through our platform; our team handles payer communications, appeal submissions, and complex case resolution. You get both speed and judgment, not one at the expense of the other.

If your denial rate has been trending up, or your AR is aging past targets, that's not a staffing problem. It's a systems and expertise problem, and it's solvable. request your free audit.