Claim denials are one of the largest, most fixable sources of lost revenue in a medical practice. Industry best practice often targets a denial rate below 5–10%, yet many practices run far higher without realizing it. This guide breaks down why claims get denied and what to do about each cause.
What is a claim denial?
A denial occurs when a payer refuses to reimburse a submitted claim. Denials differ from rejections (which fail before adjudication, usually for formatting or data errors). Denials are adjudicated decisions — and many are appealable. The goal isn't just to fight denials after the fact, but to prevent them upstream.
The most common root causes of denials
- Eligibility & coverage issues: inactive coverage, wrong plan, or coordination-of-benefits problems caught too late.
- Missing or invalid prior authorization: high-cost procedures billed without the required authorization.
- Coding errors: incorrect or unspecified ICD-10 codes, missing modifiers, or mismatched CPT/diagnosis pairings.
- Incomplete documentation: notes that don't support medical necessity for the service billed.
- Timely filing: claims submitted after the payer's deadline.
- Demographic & data entry mistakes: wrong member ID, DOB, or provider details.
How do you reduce your denial rate?
A durable denial-reduction program works on both ends of the revenue cycle:
- Strengthen the front end. Verify eligibility and benefits before the visit, and secure prior authorizations for procedures that require them.
- Scrub every claim. Run claims against current payer rules — and use AI-assisted checks to flag likely denials — before submission, with a certified biller reviewing edge cases.
- Code to the highest accurate specificity. Avoid unspecified codes where a more specific, documented code exists.
- Work denials by root cause. Categorize every denial, correct and appeal quickly, and feed the patterns back into coding and front-end workflows so they stop recurring.
- Track the metric. Monitor denial rate and time-to-resolution monthly, by payer and by reason code.
Why root-cause analysis matters
Recovering a denied claim is good; preventing the next ten is better. The highest-performing revenue cycles treat each denial as a signal. If a payer repeatedly denies a specific code for missing documentation, the fix lives in the template or the front desk — not the appeals queue.
This is exactly how Revyn approaches denial management: rapid correction and appeals, plus continuous feedback that drives the denial rate down over time.