What Is Prior Authorization
Prior authorization is written approval from your insurance company that a treatment, procedure, medication, or service meets medical necessity criteria before you receive it. Your doctor's office typically requests this approval, though you may need to initiate it yourself. Without it, your claim can be denied even if you have active coverage, leaving you responsible for the full bill.
Why Insurers Require It
Insurance companies use prior authorization as a utilization management tool to control costs and prevent unnecessary treatments. They review your medical records and diagnosis codes against clinical evidence to determine whether the proposed service aligns with established medical guidelines. This process happens before you incur the expense, theoretically preventing claim denials down the road.
The catch: insurers often deny prior authorization requests based on narrow interpretations of their own policies, not medical science. If this happens to you, you'll see a denial reason on your Explanation of Benefits (EOB) that typically cites "not medically necessary" or "experimental/investigational." This denial opens the door to appeals.
How the Process Works
- Request submission: Your healthcare provider submits a prior authorization request (form PA-1 in many states) with your diagnosis, treatment plan, and clinical justification. This typically happens 5 to 10 business days before your scheduled procedure.
- Insurance review: The insurer's medical director reviews the request within 72 hours for urgent cases or up to 15 business days for standard requests. Some states mandate faster timelines, particularly for cancer treatments or surgeries.
- Approval or denial: You receive written notification of approval or denial. An approval means the insurer has confirmed coverage; a denial means they won't pay unless you successfully appeal.
- Appeal rights: If denied, you can file an internal appeal (first-level review by the same insurer) within 180 days. If that fails, you can request an external appeal through your state's Department of Insurance, which requires an independent physician reviewer to evaluate the case.
Common Problems Patients Face
Many prior authorization denials occur because insurers apply outdated clinical criteria or misinterpret your medical records. For example, an insurer might deny a PET scan for cancer staging because their guidelines require CT first, even though your oncologist documented why PET is medically necessary in your case. Another common issue: your provider requests authorization but doesn't include sufficient documentation, forcing you to gather records yourself to strengthen an appeal.
If your provider never requested prior authorization and you received care anyway, the bill typically falls on you unless you can prove the provider should have known authorization was required. This is why patients need to confirm authorization status before any appointment.
State Regulations Vary
Your state insurance commissioner's office oversees prior authorization timelines and appeal procedures. Most states require insurers to respond to urgent requests within 72 hours and standard requests within 15 calendar days. Some states, like California and New York, impose stricter timelines. Your EOB should reference your state's appeal procedures; if it doesn't, contact your state Department of Insurance directly.
Common Questions
What happens if my doctor says treatment is medically necessary but the insurer denies prior authorization?
Your doctor's medical judgment and the insurer's denial are separate matters. File an internal appeal immediately, requesting that your doctor submit additional clinical evidence or peer-reviewed studies supporting why the treatment meets medical necessity standards. If the internal appeal fails, request an external appeal through your state insurance department. An independent physician reviewer, not your insurer, will re-evaluate the case.
Can I get care without prior authorization?
You can, but you assume financial risk. If the insurer later denies the claim due to lack of authorization, you're responsible for the full cost unless you win an appeal. Emergency care is an exception; hospitals can provide emergency treatment and request retroactive authorization. For non-emergency care, always confirm authorization status before proceeding.
How long does prior authorization take?
Standard requests take 5 to 15 business days. Urgent requests must receive a decision within 72 hours in most states. If your insurer misses these deadlines, some state regulations automatically deem the request approved. Document the request date and follow up in writing if you don't receive a response.
Related Concepts
- Medical Necessity - The clinical standard insurers use to evaluate prior authorization requests
- Utilization Management - The broader process insurers use to control treatment costs and appropriateness