The Approval Step Between the Doctor and the Treatment
Insurers require advance permission for a growing share of procedures and drugs, on the reasoning that some of what is ordered is unnecessary. The process has real cost on both sides, and much of that cost never appears in anyone budget.
The Problem It Is Supposed to Solve
In a system where a physician orders care and a third party pays for it, the person making the decision does not bear the cost. Add fee for service payment, under which the provider is paid more for doing more, and the incentive points toward volume.
Studies of care appropriateness have repeatedly found that a meaningful share of delivered services provide little or no clinical benefit, including imaging for conditions where guidelines advise against it and procedures with weak evidence for the indication used.
Prior authorization is the payer response: a requirement that the provider obtain approval before delivering certain services, so the payer can verify the request against clinical criteria before the money is spent.
What Actually Happens
The provider submits a request with clinical documentation. The payer reviews it against internal criteria, frequently derived from published guidelines but not identical to them, and approves, denies, or requests more information.
Denials can be appealed, first internally and then, in many plan types, to an external independent reviewer. The appeal process has a striking property that is central to evaluating the whole system: appealed denials are overturned at high rates.
| Observation | Interpretation |
|---|---|
| A large share of appealed denials are overturned | Many denials were wrong on the merits |
| Only a small share of denials are appealed | Most incorrect denials stand |
| Appeals require provider time and persistence | The barrier itself does the work |
If most denials that get appealed are reversed, and most denials are never appealed, then the process is producing a large volume of denials that would not survive review. Whether that is a defect or a feature depends on who you ask, and the arithmetic is the same either way.
The Costs Nobody Books
The savings from prior authorization appear on the payer income statement. The costs are distributed and largely invisible.
Provider administrative burden is substantial. Surveys of physician practices consistently report many hours per physician per week spent on authorisation requests, handled by dedicated staff whose entire function is navigating payer requirements. That cost is embedded in the price of care.
Treatment delay is the clinical cost. Turnaround times measured in days or weeks are ordinary, and for time sensitive conditions delay has consequences. Providers report cases where a patient condition deteriorated during the wait, and surveys report clinicians believing the process has led to serious adverse events.
Abandonment is the effect least captured in any data. Some share of appropriate care is simply not pursued, because the patient gives up, the provider does not have staff capacity to appeal, or the moment for intervention passes. From a spending perspective this looks identical to a successful denial of unnecessary care.
Why It Expanded
Originally applied to a narrow set of high cost, frequently overused services, the requirement has broadened considerably, driven by rising drug prices, growth in advanced imaging, and the expansion of managed care arrangements including Medicare Advantage, where plans have both the tools and the financial incentive to manage utilisation.
Government auditors examining Medicare Advantage found meaningful rates of denial for services that would have been covered under traditional Medicare rules, which sharpened the policy attention considerably, because it identified a difference in access attributable to plan design rather than to clinical judgement.
The Reform Direction
Reform efforts have converged on process rather than on abolition, which is a reasonable recognition that some utilisation management is defensible.
Electronic prior authorization standards aim to replace fax and telephone workflows with automated submission and response, which addresses administrative cost directly. Response time requirements impose deadlines for standard and expedited decisions. Gold carding exempts providers with high historical approval rates from the requirement for specified services, on the logic that a physician approved ninety five percent of the time is generating administrative cost with almost no offsetting benefit. And transparency requirements compel publication of approval, denial, and appeal statistics by service category.
Federal rules finalised in 2024 for government funded plans adopted several of these, including decision timeframes, required denial reasons, and electronic standards, with implementation phased over subsequent years.
How It Shows Up Financially
For an insurer, utilisation management is a lever on the medical loss ratio, the share of premium spent on care. Tightening it lowers the ratio and raises margin, subject to minimum loss ratio requirements that cap how far this can go in regulated markets.
For a provider, it is a cost of collection and a driver of days in accounts receivable, and denial rates are a routine operational metric. For an analyst, a payer with an unusually favourable loss ratio alongside high denial rates and pending regulatory attention is carrying a risk that is regulatory rather than actuarial.
The Bottom Line
Prior authorization exists because someone ordering care that someone else pays for will order more of it, which is a real problem with real evidence behind it. The instrument reduces spending through two different channels, denying inappropriate care and deterring appropriate care, and the available data on appeal outcomes suggests the second channel is doing more work than its defenders acknowledge. The reforms actually advancing target speed, automation, and exemption for reliable prescribers, which is the sensible place to aim, because the alternative to imperfect utilisation management is not perfect care, it is no check at all.