Healthcare.gov Plans Denied 20% of Claims in 2023

Healthcare Finance News coverage of KFF data confirming that Healthcare.gov marketplace plans denied one in five claims in 2023 brings a sharp focus to a reality that physician practices cannot afford to overlook: marketplace plans now deny claims at rates that rival or exceed some Medicare Advantage programs. With 19 percent of in-network claims and 37 percent of out-of-network claims denied, marketplace plans have become one of the most administratively challenging payer segments for practices that serve this growing patient population.

In-Network Denials at 19 Percent

The 19 percent in-network denial rate is particularly significant because it applies to physicians who have contracted with these plans. These are providers who accepted the plan's reimbursement rates, met its credentialing requirements, and agreed to its utilization management terms. When nearly one in five of their claims is denied, the implicit contract between payer and provider — you see our patients, we pay for covered services — is functioning poorly.

For practices, in-network denials carry a specific frustration: the practice has already committed to the plan's terms. It cannot bill the patient for the denied amount in most circumstances (balance billing restrictions apply to in-network claims). The practice's only path to payment is through the appeal process. At a 19 percent denial rate, the appeal workload is substantial, and each denial represents revenue that the practice expected to receive based on its contractual relationship with the payer.

Out-of-Network Denials at 37 Percent

The 37 percent out-of-network denial rate, while higher, is more expected. Out-of-network claims face coverage limitations, higher patient cost-sharing, and different adjudication standards. However, many out-of-network claims arise from emergency services, referrals to specialists not available in the plan's network, or situations where patients were not informed of their provider's network status. The No Surprises Act addresses some of these scenarios, but the 37 percent denial rate suggests that significant friction remains.

The Marketplace Context

The ACA marketplace has grown substantially, reaching over 24 million enrollees. This growth means that marketplace plans represent an increasingly significant share of the payer mix for many physician practices, particularly in primary care, family medicine, and community-based specialties. Practices that may have viewed marketplace plans as a marginal payer segment now find that 10, 20, or even 30 percent of their patients carry marketplace coverage.

The challenge is that marketplace plan administration often lags behind commercial and Medicare payer administration in sophistication. Prior authorization processes may be less standardized, provider service representatives less accessible, and appeal processes less predictable. For practices managing multiple payer relationships, marketplace plans can consume disproportionate administrative resources relative to their reimbursement contribution.

Why the 20 Percent Number Matters Strategically

The headline number — 20 percent of claims denied — has strategic implications beyond its direct financial impact:

• It may influence physician willingness to participate in marketplace networks, potentially reducing patient access
• It creates a competitive disadvantage for marketplace plans that deny at higher rates, though patients may not have visibility into denial rates when selecting plans
• It provides evidence for regulatory action — CMS oversight of marketplace plan behavior and state insurance department scrutiny
• It establishes a baseline against which reform efforts can be measured

The Practice Response

For practices serving marketplace patients, the 20 percent denial rate demands a specific operational response: marketplace claims need the same level of pre-submission review, denial tracking, and appeal management as higher-reimbursement payer segments. The temptation to deprioritize marketplace denials because of lower per-claim reimbursement is understandable but counterproductive. At a 20 percent denial rate, the cumulative revenue at risk is substantial. Practices that treat marketplace denial management as a lower priority are making a financial decision they may not realize they are making.