Prior authorization is the insurer's way of reviewing whether they'll pay for a procedure before it happens. It's supposed to be a clinical review, but in practice, it's a cost containment tool — a gate designed to be difficult enough that some patients and providers give up before getting through.
How prior authorization works
Your surgeon's office submits a prior authorization request that includes the proposed procedure (CPT codes), the diagnosis (ICD-10 codes), supporting clinical documentation, and letters of medical necessity. The insurer's utilization management team — often non-physicians applying algorithmic criteria — reviews the request against their clinical guidelines. They can approve, deny, or request additional information.
Timeline: Standard requests must be decided within 15 calendar days. Urgent requests (where delay could seriously harm your health) must be decided within 72 hours. If the insurer doesn't respond within these timeframes, the request is considered approved in many states.
Why prior authorizations get denied
Incomplete submission: Missing documentation is the #1 reason. Your surgeon's office may not have submitted all required records. Ask for a copy of everything they sent.
Criteria mismatch: The insurer's clinical criteria don't match your clinical situation. For example, they require 6 months of PT and your records show 4 months. Or they require BMI over 40 and yours is 38.
Wrong codes: The CPT or ICD-10 codes submitted may not align with the insurer's covered procedures. A coding error can cause a denial that has nothing to do with your medical situation.
How to increase approval odds
Be proactive, not passive. Don't assume your surgeon's office will handle everything perfectly. Call your insurer and ask what specific criteria they apply to your procedure, request the clinical policy document, confirm that the submitted codes match what the criteria require, and follow up every 3–5 days to check status.
If additional information is requested, respond immediately. Insurers often give a 5–14 day window to submit additional documentation. Missing this window results in automatic denial.
When to stop fighting the system
If your plan explicitly excludes the procedure (not denied for documentation — actually excluded from the policy), no amount of prior authorization will change that. If you've been through internal appeal, external review, and peer-to-peer review, and the denial stands, further administrative fighting has diminishing returns. At that point, cash-pay — domestic or international — becomes the practical path forward.
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Explore medical care in Colombia →Frequently asked questions
How long does prior authorization take?
Standard prior authorization requests must be decided within 15 calendar days. Urgent requests require a decision within 72 hours. If the insurer exceeds these timeframes without responding, the request may be considered approved in many states.
What happens if prior authorization is denied?
You have the right to appeal, request a peer-to-peer review between your surgeon and the insurer's medical director, and ultimately request an independent external review. If all administrative options are exhausted, cash-pay and medical tourism are the remaining paths.
Can my surgeon help with prior authorization?
Yes. Your surgeon's office submits the prior authorization request and can advocate on your behalf. Ask them to request a peer-to-peer review if the initial request is denied — this physician-to-physician conversation is often more effective than the standard appeal process.
Do I need prior authorization for surgery abroad?
No. Prior authorization is an insurance process. If you're paying out of pocket for a procedure abroad, no prior authorization is needed. You do need medical clearance from your primary care physician and a thorough virtual consultation with your international surgeon.