Prior Authorization & ReferralsAdvancedMedical Billing Executive AR Representative RCM Specialist Authorization Specialist

A procedure was performed without obtaining the required prior authorization. What possible options would you investigate?

Short Answer

If a required prior authorization was not obtained before the service, I would first verify whether authorization was actually required and whether any exception, retroactive authorization, reconsideration, or appeal option is available. I would also review the patient’s benefits, clinical documentation, payer policy, and provider responsibility before deciding the next action.

Detailed Answer

When a procedure is performed without the required prior authorization, the first step is to confirm that the denial is valid.

I would review the payer’s denial message, the patient’s plan benefits, and the payer’s authorization requirements for the specific service, date of service, provider, and place of service.

It is important to confirm:

Whether prior authorization was actually required
Whether the service was performed as an emergency
Whether an authorization existed but was entered incorrectly
Whether the authorization applied to a different provider, facility, date range, procedure, or number of units
Whether the payer allows retroactive authorization in limited situations
Whether reconsideration or appeal is available

If the payer allows retroactive authorization, the authorization team may be able to submit the required clinical documentation and request approval after the service. This is payer-specific and should never be assumed to be available.

If retroactive authorization is not allowed, I would determine whether there are valid grounds for reconsideration or appeal. For example, an appeal may be appropriate if authorization was not required under the patient’s plan, the service was urgent or emergent, the payer gave incorrect information, or the provider has documentation showing that the denial should be reconsidered.

The clinical documentation should be reviewed carefully because the payer may require evidence of medical necessity or circumstances that explain why authorization was not obtained before the service.

The account should also be reviewed to determine where the process failed. For example:

Eligibility team did not identify the authorization requirement
Authorization was requested but never completed
Approval was obtained but not linked to the claim
Procedure changed after authorization
Additional units or visits exceeded the approved amount

If the denial is ultimately valid and cannot be overturned, the next financial action should follow the provider’s contract, payer rules, and organizational policy. The balance should not automatically be transferred to the patient without confirming whether patient billing is permitted.

The broader goal is not only to resolve the claim, but also to identify the workflow failure that caused the authorization to be missed and prevent similar denials in the future.

Key Points to Mention

Confirm that authorization was actually required.

Review the exact payer denial reason.

Check whether an authorization already existed.

Verify procedure, provider, date range, units, and place of service.

Investigate retroactive authorization if the payer allows it.

Review reconsideration or appeal options.

Check for emergency or urgent-service exceptions when applicable.

Review clinical documentation and medical necessity.

Do not assume retroactive authorization is available for every payer.

Do not automatically bill the patient after an authorization denial.

Identify the internal workflow failure that caused the issue.

Use the denial as an opportunity to prevent future authorization errors.

Example Scenario

A patient receives an imaging procedure, and the claim is later denied because prior authorization was required.

The authorization specialist reviews the account and confirms that no authorization was obtained before the service.

The payer’s policy is then reviewed, and the payer allows a limited retroactive authorization process in certain circumstances.

The team submits the requested clinical documentation within the payer’s allowed timeframe. If the payer approves the retroactive request, the claim may then be reconsidered or reprocessed according to the payer’s process.

If retroactive authorization were not available, the team would review whether an appeal or another exception applied.

Common Mistakes

Assuming the denial cannot be resolved without investigating.

Assuming every payer allows retroactive authorization.

Resubmitting the claim without addressing the authorization issue.

Failing to confirm whether authorization was actually required.

Ignoring emergency or urgent-service exceptions.

Not reviewing whether an authorization existed under another number or provider.

Billing the patient immediately without reviewing payer and contractual rules.

Filing an appeal without supporting documentation.

Resolving the claim without identifying why the authorization was missed.

Assuming authorization requirements are the same across all plans.

Interview Tip

A strong answer should show that you would not immediately accept or appeal the denial. Explain that you would first validate the authorization requirement, check for an existing or retroactive authorization option, review appeal rights, and then correct the underlying workflow issue.