Prior Authorization

Insurance Companies Use Prior Authorization to Keep Health Care Costs in Check

A doctor fills out a prescription.
A doctor fills out a prescription.. Hero Images/Getty Images

Prior authorization is a requirement that your physician obtain approval from your health care provider before prescribing a specific medication for you or to performing a particular operation. Without this prior approval, your health insurance provider may not provide coverage, or pay for, your medication or operation, leaving you to cover some, or all, of the costs out of pocket.

Why Do Health Insurers Require Prior Authorization?

There are several reasons that a health insurance provider requires prior authorization.

Your health insurance company uses a prior authorization requirement as a way of keeping health care costs in check. It wants to make sure that:

  • The service or drug you’re requesting is truly medically necessary.
  • The service or drug follows up-to-date recommendations for the medical problem you’re dealing with.
  • The drug is the most economical treatment option available for your condition. For example, Drug C (cheap) and Drug E (expensive) both treat your condition. If your doctor prescribes Drug E, your health plan may want to know why Drug C won’t work just as well. If you can show that Drug E is a better option, it may be pre-authorized. If there’s no medical reason why Drug E was chosen over the cheaper Drug C, your health plan may refuse to authorize Drug E.
  • The service isn’t being duplicated. This is a concern when multiple specialists are involved in your care. For example, your lung doctor may order a chest CT scan, not realizing that, just two weeks ago, you had a chest CT ordered by your cancer doctor. In this case, your insurer won’t pre-authorize the second scan until it makes sure that your lung doctor has seen the scan you had two weeks ago and believes an additional scan is necessary.

    An ongoing or recurrent service is actually helping you. For example, if you’ve been having physical therapy for three months and you’re requesting authorization for another three months, is the physical therapy actually helping? If you’re making slow, measurable progress, the additional three months may well be pre-authorized.

    If you’re not making any progress at all, or if the PT is actually making you feel worse, your health plan might not authorize any further PT sessions until it speaks with your physician to better understand why he or she thinks another three months of PT will help you.

    In effect, a pre-authorization requirement is way of rationing health care. Your health plan is rationing paid access to expensive drugs and services, making sure the only people who get these drugs or services are the people for whom the drug or service is appropriate.

    Also Known As: Drug PA


    Many health plans require prior authorization for very expensive medications such as Lamisil (terbinafine) tablets, an expensive medication used to treat toenail fungus

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