What Is Prior Authorization In Healthcare?

You finally get the prescription or scan your doctor ordered, only to learn your insurance company wants to review it first. Prior authorization is a process where your health insurer requires approval before it will cover certain medications, tests, procedures, or hospital stays. The insurer checks whether the service meets its coverage rules before paying. Until that approval comes through, the care is often delayed or, in some cases, denied.

What Is Prior Authorization In Healthcare?

Prior authorization — sometimes called preauthorization or precertification — is a requirement that your doctor get permission from your insurance plan before you receive a specific service. Not every service needs it. Routine office visits usually do not. Expensive drugs, imaging like MRIs and CT scans, elective surgeries, and specialty care often do.

The purpose is cost control. Insurers want to confirm that a service is medically necessary and that it follows the plan’s rules before they pay for it. That sounds reasonable on paper. In practice, it means a paperwork step sits between your doctor’s decision and your care.

Here is the part many people miss. Prior authorization is not the same as a referral. A referral is your primary care doctor sending you to a specialist. Prior authorization is your insurer deciding whether to cover what that specialist recommends. You can have a valid referral and still get stuck waiting on authorization.

Why Does Prior Authorization Exist?

Health insurers say the process reduces unnecessary care and keeps premiums down. The logic is that if a plan reviews high-cost services ahead of time, it can avoid paying for treatments that are not supported by evidence or that fall outside coverage rules.

Whether it saves money in a way that benefits patients is a different question. Critics argue the process mostly shifts burden onto patients and doctors. A doctor who has to file paperwork and wait on hold is a doctor not seeing patients. And a patient waiting for approval is a patient not getting treatment.

Some research suggests administrative costs in US healthcare are substantial, though estimates vary widely depending on what is counted. What is clearer is that the process adds delay. How much delay, and how often it changes the outcome, depends heavily on the plan and the service.

Which Services Usually Need Prior Authorization?

Requirements vary by plan, so there is no universal list. That said, certain categories show up again and again.

• Prescription drugs — especially brand-name medications, specialty drugs, and anything expensive
• Imaging — MRI, CT, and PET scans are common targets
• Surgeries — planned or elective procedures, including many orthopedic operations
• Hospital admissions — non-emergency stays often need approval in advance
• Specialist visits — some plans require approval to see certain specialists
• Durable medical equipment — wheelchairs, CPAP machines, and similar items
• Out-of-network care — seeing a provider outside your plan’s network

Emergency care is treated differently. Federal rules generally require that emergency services be covered without prior authorization, because you cannot plan an emergency. If you go to an emergency room, your plan typically cannot demand approval first.

What Happens During The Approval Process?

Your doctor’s office submits a request to your insurer. That request usually includes your diagnosis, the service being recommended, and the clinical reason it is needed. The insurer then reviews it against its coverage criteria.

The review can go a few ways. The plan may approve it. It may ask for more information. It may deny it. Or it may approve a different service than the one your doctor requested — for example, a cheaper drug instead of the one prescribed.

Many requests are decided quickly, sometimes within a day or two. Others take longer, especially if the plan wants additional records. When a decision takes too long, the delay itself can become the problem. A treatment that works best within a certain window may be less effective if it starts weeks late.

Some approvals are valid for a set period. A plan might authorize a course of physical therapy for a certain number of visits, after which you need a new approval to continue.

What Can You Do If A Request Is Denied?

A denial is not always the end. You have the right to appeal, and appeals sometimes succeed.

The first step is to find out why it was denied. The denial notice should state the reason. Sometimes it is a missing document. Sometimes the plan says the service is not medically necessary, or that a cheaper alternative should be tried first.

Then you or your doctor can file an appeal. Your doctor can often provide additional clinical information that addresses the specific reason for denial. This is one reason it helps to keep your doctor in the loop — they know your history and can argue the medical case.

If the first appeal fails, many plans offer a second-level appeal. Beyond that, there may be an external review, where an independent party outside the insurance company looks at the decision. Rules about these steps come from a mix of federal law and state regulations, and they differ depending on the type of plan you have.

Timelines for appeals are set by law and by the plan. If you are facing a denial, ask your insurer directly what your appeal options and deadlines are. Do not assume you have missed your window — but do not sit on it either.

How Does Prior Authorization Affect Patient Care?

The main effect is delay. A study published in the journal Health Affairs and other research have documented that prior authorization can postpone care, and that some patients abandon treatment entirely when the process becomes too difficult.

There is a real concern about harm. When a treatment is delayed, symptoms can worsen. In some cases, a condition that might have been managed early becomes harder to treat. This does not happen with every request, and many are approved without incident. But the risk is real enough that physician groups have pushed for reform.

Another effect is burden on doctors. Clinicians report spending significant time on prior authorization paperwork, time that could go to patient care. This is one of the more consistent complaints in surveys of physicians.

A non-obvious point: the biggest impact is often not on the denied cases but on the ones that take a long time to approve. A denial at least gives you something to appeal. A slow approval just leaves you waiting, sometimes without a clear reason.

Is Prior Authorization Changing?

Yes, and mostly in the direction of speed. Several states have passed laws requiring faster decisions and more transparency. Some insurers have automated parts of the process, using electronic systems that can return an answer in minutes for straightforward requests.

There has also been movement toward reducing the number of services that require prior authorization at all. Some plans have dropped the requirement for certain routine procedures. This is not uniform — what one plan removes, another may keep.

Federal rules have also addressed the issue in specific areas. For example, rules around emergency services and some behavioral health coverage have limited when a plan can require prior authorization. The details matter and they change, so the safest approach is to check your own plan’s current policy rather than rely on general statements.

The direction of travel is toward less friction, but the pace is slow and uneven across plans and states.

How Can You Prepare For Prior Authorization?

You cannot avoid the process entirely, but you can make it less painful.

• Ask your doctor’s office whether the service they recommend needs prior authorization
• Confirm your plan’s rules before scheduling, not after
• Keep copies of denial notices and any paperwork
• Stay in contact with your doctor’s office — they often handle the request
• Ask directly about appeal deadlines if something is denied

One practical tip: if a service is denied, ask whether a different but equivalent service would be covered. Sometimes the issue is not the care itself but the specific code or drug on the request.

It also helps to know your plan type. Rules differ between HMOs, PPOs, and other plan designs, and between plans you get through an employer versus ones you buy yourself. The same service can be handled differently depending on which you have.