ACA Marketplace post-service claims are overturned on appeal 44% of the time. Less than 1% are ever appealed. Prior authorization denials are overturned on appeal more than 80% of the time. Less than 12% of them are ever appealed. That revenue has a calculable value. The question is whether you build the system to go get it.
Most billing operations triage denials. High-dollar claims get worked. Lower-dollar claims age past their appeal deadlines and are written off. The triage feels rational at the claim level and costs you significantly at the portfolio level. The organizations recovering the most from prior authorization denials have made one structural change: they treat every denied claim as a filed appeal by default, and they built the workflow that makes that operationally possible.
There are six steps to get this workflow started. They build on each other, and the first one is worth completing regardless of what you do next.
Step 1: Pull your denial data into the right structure
Most practice management systems default to single-dimension denial reports: monthly data by payer or by reason code and denial date. Pull your data at the line-item level. Include CPT code, CARC, RARC, denial date, and date of service.
Include both dates deliberately. Denial date tracks when the claim ran through the payer's rules engine. Date of service tracks clinical policy changes tied to the episode of care. A spike in denial dates without a corresponding spike in service dates points to a rules engine change. A spike in both points to a clinical policy change that has been in effect longer than your billing cycle. You need both to trace the root cause back to the payer, and that distinction matters for what you do next.
Pull a trailing 12-month export. When you build it, you will almost always find that two or three payer-CPT combinations account for a disproportionate share of your total dollar exposure. You now have the foundation for your new workflow.
Step 2: Rank by dollar impact, not denial rate
A 30% denial rate on a $150 office visit and a 15% denial rate on a $6,000 infusion claim are not the same problem. Multiply denial rate by average allowed amount for each payer-CPT combination. That produces a dollar exposure ranking that tells you where to invest the additional work of building payer-specific appeal templates and documentation redesign, rather than applying the same generic template to everything.
Step 3: Benchmark against publicly available payer data
Cross-reference your highest-exposure payer-CPT combinations against publicly available Medicare Advantage denial data for the same payers. CMS now requires MA plans, Medicaid managed care plans, and ACA marketplace issuers to publicly post prior authorization denial rates and appeal outcomes annually. A practice seeing a 22% denial rate on outpatient oncology infusion claims from a payer whose reported MA denial rate for comparable services is 12.8% has a documented discrepancy worth raising in a contract conversation. The benchmark is directional, but a material gap is a gap the payer will need to explain.
Step 4: Compare payer criteria against what you are actually submitting
Pull the payer's current clinical policy bulletin for each high-exposure procedure. Every major commercial payer publishes these on its provider portal. Compare the criteria in force against what your team routinely submits in prior authorization requests. The gap is almost always there. For procedures subject to AI-driven adjudication, the documentation requirement has shifted from clinical narrative to structured fields that satisfy an algorithm's decision logic. Your appeal templates need to address the algorithm's criteria. That is a workflow change, not a clinical one, and it does not require a technology investment.
Step 5: Separate workflow-driven denials from payer-driven denials
The date pattern from Step 1 is one of your primary diagnostic tools here. Workflow-driven denials respond to documentation improvements and better appeal templates. Payer-driven denials reflect something the payer changed. The date analysis tells you which you are dealing with before you decide how to respond. Payer-driven problems require a payer-level conversation, a contract renegotiation lever, or in states with applicable law, a regulatory complaint. Building documentation fixes for a contract problem will not recover the revenue.
Step 6: Build the financial baseline
For each high-exposure payer-CPT combination, recoverable revenue is the dollar value of denied claims multiplied by the applicable overturn rate. Express that as a current-year exposure and a projected annual run rate. That number gives your CFO and any PE operating partners a specific figure to evaluate against the cost of building the systematic appeal workflow. It also separates the leakage into two buckets: what is recoverable through internal workflow improvement this year, and what requires a payer-level response over the next contract cycle.
The combined segmentation in Step 1 surfaces concentration patterns that single-dimensional reports obscure. The financial model in Step 6 makes the case for resourcing the workflow in language your leadership team understands. The appeal you did not file is the most expensive decision in your denial management operation. The data showing you would have won it has been in the public record for years.