How Long Does Prior Authorization Typically Take?
A scheduled procedure can suddenly feel uncertain the moment it’s waiting on prior authorization. How long that wait actually lasts depends heavily on the type of request, how it’s classified, and which insurer is reviewing it.
The short answer
There is no single universal timeline. Standard prior authorization requests are commonly decided within a few business days to around two weeks, while expedited or urgent requests tied to time-sensitive care are generally reviewed much faster, sometimes within a day or two. The exact window depends on the plan’s internal rules, the type of service requested, and any applicable timing requirements, which can vary and change over time.
Standard requests versus expedited requests
Most prior authorization requests fall into a standard review track, used for planned, non-urgent care such as an MRI or CT scan scheduled weeks out. Expedited review is reserved for situations where a delay could seriously jeopardize health, and it typically requires the provider to specifically flag the request as urgent and explain why. Insurers generally hold themselves to a faster internal deadline for expedited cases, though the exact timing varies by plan.
What tends to slow a decision down
- Incomplete documentation. A request missing chart notes, test results, or a clear treatment rationale is often paused until the provider’s office supplies more information.
- A need for additional clinical review. Some cases get escalated to a peer-to-peer review, where a reviewing physician discusses the case directly with the treating doctor, which adds time before a final decision.
- High request volume. Periods of heavy demand, such as after a new plan year begins, can slow turnaround even for straightforward requests.
- Multiple services bundled together. A request covering several related services at once sometimes takes longer than a single, isolated request.
Why starting early matters
Because standard review can stretch toward two weeks, submitting a request well before a scheduled procedure gives more room to resolve any back-and-forth without pushing back the appointment. Waiting until close to a procedure date leaves little cushion if the insurer asks for more information or if the case needs a second look.
What happens while a decision is pending
During the review window, a provider’s office typically has visibility into the request’s status and can check for updates or respond to any additional information requests from the insurer. If a decision doesn’t arrive in the expected window, following up rather than assuming approval is generally the safer approach, since proceeding with care before an approval is finalized carries the risk of a denial later, and there are established next steps if that happens.
The bottom line
Prior authorization timelines are shaped by urgency, documentation, and plan-specific rules rather than a fixed clock that applies everywhere. Building in extra lead time before a scheduled procedure, and staying in touch with the provider’s office about where a request stands, tends to reduce the chance that a delay turns into a scheduling problem.