Why Complex Claims Get Stuck in Healthcare (And What It’s Costing Hospitals)
November 18, 2025
A stalled complex claim rarely announces itself. The account sits in a work queue, looking like it's being managed, while days turn into weeks and the payer's timely filing window counts down. By the time someone flags it as a problem, the options have often narrowed significantly.
Understanding why complex claims get stuck, and what the cumulative cost of that stalling is, starts with recognizing that the causes are rarely random. They cluster around a predictable set of structural problems.
For a broader view of how complex claims impact hospital operations, see Complex Claims in Healthcare: Challenges, Workflow, and Recovery.
A foundational overview of these claims is outlined in What Are Complex Claims in Healthcare.
Coverage That Isn’t Clear at the Start
Most complex claims begin with an information gap. A patient treated after a car accident may have MedPay, PIP, liability coverage, or some combination, plus commercial or government insurance that sits in secondary or tertiary position. Workers' comp claims require verification of employer, carrier, jurisdiction, and compensability before billing can proceed. VA claims require pre-authorization.
When those foundational questions aren't answered at registration or shortly after, claims enter the billing cycle in an unresolvable state. Staff submit to the most obvious payer, receive a denial, then spend weeks tracing the actual coverage situation that should have been established at intake. That rework is expensive and delays payment by weeks or months.
The problem is compounded by the sheer number of payers in the complex claims space. Workers' comp alone involves hundreds of carriers, state funds, and self-insured employers, each with their own rules and forms. The WCRI's 2025 fee schedule study documented the continuing divergence of state-level WC payment methodologies, making it increasingly difficult for non-specialist teams to maintain current knowledge across jurisdictions.
Documentation Deficiencies That Cause Downstream Denials
Complex payers require more documentation than standard commercial carriers, and they require specific types of documentation tied to their regulatory obligations. Workers' comp carriers often require first reports of injury, employer certifications, and jurisdiction-specific forms alongside the claim. VA Community Care billing requires proof of authorization before payment will be made. MVA cases involving litigation may require coordination with legal counsel before billing is appropriate.
When that documentation isn't gathered proactively, claims either fail on first submission or sit waiting for records that should have been collected weeks earlier. Each missing document creates a delay, and each delay increases the risk that the account will age past the point where timely filing allows recovery.
Fragmented Ownership Across Departments
Complex claims involve more parties than standard accounts: patient access, clinical documentation, billing, follow-up, legal (in MVA cases), and often payer representatives who require direct contact to resolve disputes. Without clear ownership at each handoff, accounts fall into gaps.
A patient access team captures injury-related information at registration but doesn't know the billing requirements for that claim type. The billing team receives the account but lacks the follow-up expertise to navigate the carrier. The follow-up team works the denial but doesn't have authority to engage an attorney. Meanwhile, 90 days pass.
HFMA has highlighted fragmented ownership as one of the primary drivers of avoidable write-offs in complex claim populations. Organizations that consolidate end-to-end accountability within a dedicated team or a dedicated partner consistently outperform those with distributed ownership across departments that weren't designed for this claim type.
Timely Filing Windows That Close Without Warning
Workers' comp timely filing requirements vary by state, with some jurisdictions setting limits as short as 60 days from the date of service, and appeal periods as short as 30 days after denial, according to HFMA's revenue cycle management guidelines. Missing a timely filing deadline on a $30,000 workers' comp claim creates a permanent write-off.
The challenge is that timely filing windows are payer-specific and claim-type-specific. Commercial payers follow one set of rules, workers' comp carriers vary by state, and VA programs have their own entirely. Staff who manage all of these simultaneously are at high risk of missing a deadline because the mental model required to track them all doesn't exist in a standard billing environment.
The Revenue Cost of Stalled Claims
Hospitals write off an estimated 10 to 15 percent of complex-claim balances due to administrative burden, and that write-off rate represents a meaningful and largely preventable revenue loss. A health system placing $100 million in complex claims annually could be writing off $10 million to $15 million. The claims were payable. The administrative process to collect them broke down.
A/R cycles extending to 150 to 180 days or beyond mean that cash from complex claims is delayed by months relative to standard accounts. That deferred cash has real carrying costs and real operational implications for systems already managing thin margins.
The AHA's 2026 Costs of Caring report documented that hospitals spent $43 billion in 2025 collecting payments from insurers for care already delivered. Complex claims, with their elevated pursuit costs and higher write-off rates, represent a disproportionate share of that administrative burden.
Breaking the Pattern
The common thread across most stalled complex claim scenarios is the same: standard tools, standard workflows, and generalist staff applied to claims that require specialized handling. Organizations that have reduced write-offs and accelerated resolution in this space have done so by treating complex claims as a separate discipline, with dedicated expertise, purpose-built technology, and clear accountability from intake through payment.
Hospitals can proactively detect these issues earlier using strategies outlined in How to Identify Stalled Complex Claims.
How Revecore Helps Prevent Stalled Complex Claims
Revecore's complex claims approach is structured around exactly that separation by claim type, with attorney-informed workflows for legal complexity and automated payer discovery to close the identification gap that causes so many accounts to stall before billing even begins.