How claim denial works
A denial is different from a rejection: a rejected claim never enters the payer's adjudication process because of a technical error, while a denied claim was reviewed and processed but the payer decided not to pay some or all of it. Common denial reasons include lack of medical necessity documentation, expired eligibility, missing prior authorization, or a non-covered service.
Denials need to be worked, not just recorded: the billing team reviews the reason code, gathers any missing documentation, and either corrects and resubmits the claim or files a formal claim appeal within the payer's deadline, which is often 90 to 180 days from the denial date depending on the payer. Unworked denials become lost revenue once the appeal window closes.
Example
A $600 claim is denied because the payer states the prior authorization on file does not match the billed procedure code. The billing team pulls the original authorization, confirms it does cover the service, and resubmits the claim with a corrected code and a note referencing the existing authorization number, recovering the full $600 within three weeks.
Claim denial in QuickBooks Online vs Xero
Practice-management systems track denials by reason code and status, letting the billing team prioritize work by dollar amount or deadline. Recovered denial payments post the same way as any other claim payment, reconciled to the deposit in the general ledger in QuickBooks Online or Xero.
Common mistakes
- Confusing a claim rejection with a denial and handling both the same way, which delays fixing a technical submission error that never even reached the payer's adjudication process.
- Letting denials sit unworked while staff focus on new claims, which lets the payer's appeal deadline pass and turns a recoverable denial into permanent lost revenue.
- Not tracking denials by reason code, which makes it impossible to see that the same root cause, such as missing authorization, keeps generating new denials every month.
Why it matters
An unworked claim denial is revenue for care already delivered that a healthcare provider simply never collects, which can add up to a meaningful share of a practice's expected income over a year. For a practice manager watching cash flow, tracking denial reasons also points to the upstream fix, whether that is tighter eligibility checks or better authorization tracking, that prevents the same denial from recurring.
Related terms
How LedgerBPO handles claim denial
We work denials by reason and dollar value, gathering the documentation needed to correct and resubmit or appeal before the payer's deadline. Follow-up calls to payers on aging denials are handled through our insurance follow-up call service.