Introducing the Substrate Eligibility Agent | Substrate
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June 23, 2026
Introducing the Substrate Eligibility Agent<br>Ayo Omojola
Front end end errors are a primary driver of denials. The Substrate Eligibility Agent can help remediate them.
Background<br>For many health care practices, eligibility-related denials are the most common denial category. In 2024, 24% of denials were caused by registration and eligibility. In our network, we’ve seen practices with eligibility based denials taking up as much as 35% of denials by claim count, and 60% by dollar value. Industry-wide front-end issues (eligibility, registration, prior auth, and coverage) account for roughly half of all denials.<br>These denials are mostly unrelated to the quality of care delivered, and thankfully, they’re mostly avoidable.
Front end errors become back end denials<br>When eligibilty, registration and benefit registration is done correctly, patients get a reasonable estimate of what they owe, and clinicians can provide care knowing they’ll be reimbursed. When done poorly, front end errors cause several problems.<br>Higher revenue leakage: By Contributing to your overall denials volume, they reduce the amount of claims your billers can touch, and ultimately recover<br>Slower collections: The more denials you have to work, the slower you get paid.<br>Higher cost to collect: it can cost an incremental $25 per claim just to get reimbursed for care you already provided. This eats into already thin margins.<br>Degraded patient experience: Increased denials often mean inaccurate or higher patient bills.<br>Eligibility based denials are caused by both organization and technology<br>Org structure can make things worse. Receptionist and front desk teams handling intake and registration rarely report into the same leader as revenue cycle, but front-end errors impact the outcomes that revenue cycle leaders are held accountable for.<br>Technology also contributes. Today, most eligibility tools tell you whether the patient’s insurance is “valid” and that's as good as it gets. Specific details including the patients specific benefits, their copay and other cost share, and whether they have other insurances, are often left to the front desk to call the payer or check the portal. Often, this means they're just not addressed at all.<br>Most eligibility products are for front end users. Substrate’s Eligibility Agent is the first built specifically for denials. If your team works denials, spends time on claim status, logs into portals, or calls payers, the Substrate Eligibility Agent is for you .<br>Why do Eligibility Related Denials Occur?<br>Eligibility-related denials are often caused by front end issues during registration. Common examples include:<br>The patient's insurance is not valid on that particular date of service.<br>Misspellings of a patient name.<br>Mistyping of a patient date of birth.<br>Mistyping of a patient member ID.<br>Not getting a prior auth when one was required for a specific procedure.<br>Not getting a PCP referral when one was required for a specific procedure.<br>The patient having benefits provided or paid by another plan, not the main plan. Things such as carve-outs<br>coordination of benefits issues. Very often patients will have multiple insurances, and you have to submit the claim to the correct insurance first.<br>Picking the wrong payer; sometimes you verify eligibility with one Blue, and that is successful, but the claim needs to be submitted to another one<br>Some payers will pay a claim even when the patient name is misspelled. Others will deny a claim over a missing middle initial.<br>We built the Substrate Eligibility Agent to solve these problems.<br>How The Substrate Eligibility Agent Works<br>The Substrate Eligibility Agent uses the same tools that your front desk or receptionist uses. These include multiple clearinghouses (including yours), multiple API providers and payor portals.<br>It combines data from a coverage discovery, eligibility response, and claim status, to figure out exactly why a claim was denied.<br>Finally, unlike most eligibility tools, the Substrate Eligibility Agent is built for denials; it explicitly combines eligibility (270/271) with claim status (276/277), EOBs, and payor portal responses. It can also be deployed during registration or claim creation, but the denials focus is truly unique.<br>Substrate's Eligibility Agent is built on the denial patterns of millions of real claims across thousands of payers. It knows that Anthem-CA has strict subscriber ID formatting requirements. It knows that UHC eligibility must be verified with payer ID 87726 but claims might need to be submitted to another plan. It knows these things because it has seen what happens when practices get them wrong.
We start by ingesting several types of context<br>Patient provided context including their insurance cards and ID<br>Practice context such as specialty, NPIs, Tax Ids<br>Encounter details such...