What Is Prior Authorization?
Prior authorization (also called pre-authorization or pre-approval) is when an insurance company reviews and approves a planned treatment before you provide the service. The payer reviews the clinical justification to confirm the service is medically necessary before approving payment.
In simple terms:
You submit a request with clinical information → The payer reviews it → They approve or deny the treatment → You proceed (or appeal if denied).
Important: Prior authorization approval is not a guarantee of payment. It only means the payer approves the medical necessity of the service. Coverage, eligibility, and other factors can still result in a denial later.
Why Do Payers Require Prior Authorization?
Payers use prior authorization to control costs and reduce unnecessary procedures. In theory, it's a quality gate. In practice, it's often used to delay approvals or encourage the use of cheaper alternatives.
Cost Control
Payers want to review expensive procedures before authorizing payment.
Clinical Validation
They want to confirm the service is medically necessary before paying.
Gatekeeping
They may push cheaper alternatives (generic drugs, less expensive procedures).
When Is Prior Authorization Required?
Not all services require prior authorization. It depends on the payer and the plan. Common services that usually require it:
Often Requires PA:
- • Surgical procedures
- • Advanced imaging (MRI, CT)
- • Specialist referrals
- • High-cost medications
- • Rehabilitation services
- • Mental health treatment
Usually Does NOT:
- • Office visits
- • Laboratory tests
- • Basic imaging (X-rays)
- • Emergency care
- • Preventive services
- • Simple medications
The golden rule: If you're unsure, check with the payer or verify against the patient's benefit information before providing the service.
How to Request Prior Authorization
The process varies by payer, but most follow a similar pattern.
Verify It's Required
Check the patient's benefit verification or the payer's website. Don't waste time requesting PA for services that don't need it.
Gather Required Documentation
Most payers want:
- • Patient demographics and insurance information
- • Provider NPI and credentials
- • Clinical diagnosis and reason for the service
- • Proposed CPT codes and estimated charges
- • Clinical justification (relevant exam findings, test results)
- • Any relevant clinical guidelines or payer criteria
Submit the Request
Check the payer's portal or website for submission method:
- • Online portal (fastest)
- • Phone (often slow, but get confirmation number)
- • Fax or mail (slowest)
- • Clearinghouse (EDI submission)
Track the Request
Get a confirmation number or reference ID. Note the submission date and expected response date. Follow up if you don't hear back.
Get Written Authorization
The payer will send an approval letter (or denial letter). Save this. You need it to defend the claim if there's a dispute later.
Common Prior Authorization Mistakes
Mistake #1: Assuming You Have PA When You Don't
Always verify that PA was actually approved before billing. Just because you submitted a request doesn't mean it was approved. Get written confirmation.
Mistake #2: Missing the Authorization Window
Many payers give PA for a specific time period (e.g., valid for 30 days). If you provide the service after the window closes, it's not covered. Check the approval letter for validity dates.
Mistake #3: Wrong CPT Codes in the Approval
The approval might be for different CPT codes than what you actually bill. Verify the codes match before submitting the claim.
Mistake #4: Ignoring a PA Denial
If the payer denies your PA request, you have options: provide additional clinical evidence, request a peer-to-peer review, or appeal the decision. Don't just bill and hope.
Tips for Fast Prior Authorization Approval
- Use the online portal. Phone and fax requests take longer. Most payers have online portals now—use them.
- Include strong clinical justification upfront. Don't make the payer ask for more information. Provide it all the first time.
- Reference the payer's own criteria. If they publish clinical guidelines, cite them. Show how the patient meets their criteria.
- Request expedited review if urgent. Many payers offer faster turnaround for urgent cases. Use this when the patient needs the service quickly.
- Follow up proactively. Don't wait passively. Call the payer on day 3-4 if you haven't heard back. Get a status update.
Streamline Your Prior Authorization Process
RediClaim helps with the clinical justification portion of PA requests. Upload your clinical notes and RediClaim will generate a clear, evidence-based summary ready to include in your PA submission.
Try RediClaim Free