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Why pre-authorisations get denied, and what fixes each reason

The denial letter names a reason. Each reason has a different fix, a different owner, and a different clock.

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The reason on the letter is a category, not a verdict

A pre-auth denial is rarely a judgement on whether the patient needs treatment. It is a statement that the file, as submitted, did not satisfy a checklist. The fix begins with reading which checklist item failed, because each maps to a different desk in your hospital.

Three reasons dominate

Across payer types the same three families recur: insufficient clinical justification, policy-level exclusions surfacing late, and documentation that arrived incomplete or inconsistent. Only the first is a clinical conversation. The other two are process failures that were visible at admission.

Denial reason, the fix, its owner, and the clock — illustrative mapping
SituationThe moveOwnerWhen
Insufficient justificationTreating doctor note, investigations attachedTreating clinicianSame day
Policy exclusion citedVerify clause against policy schedule; contest if misappliedInsurance desk24–48 h
Incomplete documentsSend the named missing item, nothing else re-openedInsurance deskSame day
Tariff / room mismatchRe-map to contracted category before appealBillingBefore resubmission
Duplicate requestWithdraw one thread; two open threads stall bothInsurance deskImmediately

The resubmission clock

Every payer allows a response window. The window is shortest exactly when the patient is on the table, which is why the fix cannot be a committee. It has to be a named person with the file already open.

What to do on Monday

Worked examples on this page are illustrative arithmetic on stated assumptions, not measured market statistics.

Read the mechanism. Now check your own numbers.

Bring twenty settled claims, advices only, patient details redacted. We name the clause behind each reduction and you keep the findings.