Your Prior Authorization Was Denied: What to Do Next

Prior authorization is a requirement, used by most Medicare Advantage plans, that your plan approve certain services or drugs before it will cover them. If a request was denied, you have appeal rights. Plans are required to give you a reason for the denial and a specific process for challenging it. Repeated friction with prior authorization is also a legitimate reason to compare other plans the next time enrollment opens.

What prior authorization actually is

Prior authorization means your doctor's office requests approval from your Medicare Advantage plan before a service, procedure, piece of equipment, or drug is covered. It is not unique to Medicare Advantage as a concept, but Advantage plans use it more heavily than Original Medicare, which generally does not require this kind of advance approval for most services. Original Medicare covers care as it is delivered, based on medical necessity, without a separate approval step in most cases.

Medicare Advantage plans are permitted to use prior authorization as a way to manage costs and confirm that a requested service fits their coverage rules. That is a legitimate part of how these plans are structured. It is also, for many members, the single most frustrating point of contact with their plan, because it introduces a delay — and sometimes a denial — between a doctor's recommendation and the plan actually paying for it.

What a denial notice is required to include

If your prior authorization request is denied, the plan is required to tell you why, in writing, and to explain how to appeal. This is not optional on the plan's part. CMS has been tightening these requirements through recent rulemaking aimed at making prior authorization processes more transparent and timely; see CMS's fact sheet on the interoperability and prior authorization final rule for the federal-level detail on what plans must disclose and how quickly they must respond.

A denial notice should state the specific reason coverage was not approved, not just that it was denied. If a notice you received does not clearly explain why, that itself is worth raising with the plan directly, since a vague denial makes it harder for your doctor to address whatever the plan's actual objection was.

What kinds of things typically require it

Prior authorization requirements vary by plan, but they tend to cluster around certain categories: some imaging services, certain durable medical equipment, some skilled nursing or rehabilitation stays, specialty drugs, and some outpatient procedures. Not every plan requires prior authorization for the same list of services, and a plan's list can change from one year to the next, which is one more reason the ANOC and the plan's own materials are worth reading rather than assuming this year works like last year.

Routine primary care visits generally do not require prior authorization. The requirement tends to show up around costlier or more specialized care, which is also where a delay or denial is most consequential for the person waiting on it. If you are scheduled for a procedure or piece of equipment and are not sure whether it needs prior authorization, asking your doctor's office or the plan directly before the appointment can prevent a surprise denial after the fact.

You have the right to appeal

A prior authorization denial is not the final word. Medicare Advantage plans are required to have an appeals process, and you have the right to use it. There are specific appeal deadlines that vary by request type — some situations call for a faster, expedited review, particularly when waiting could seriously affect your health — so the notice you received should specify the timeframe that applies to your case. Medicare.gov's claims and appeals section lays out the general structure of how Medicare appeals work, including the fact that most denials can be appealed through multiple levels if the first appeal does not resolve in your favor.

Your doctor's office is often already familiar with this process and can help submit additional clinical information as part of an appeal. A denial based on medical necessity, for example, is sometimes overturned once the plan receives more complete documentation from the prescribing or treating physician.

When prior authorization friction becomes a plan problem

A single denial that gets resolved through appeal is a normal part of how these plans operate. A pattern of repeated denials, delays, or prior authorization requirements on routine care is a different matter, and it is a legitimate reason to look at what else is available in your county. Some Medicare Advantage plans use prior authorization more heavily than others, and plan-to-plan differences in how often approvals are required, and how quickly they come through, are not always obvious from a summary of benefits alone.

If prior authorization has repeatedly slowed down or blocked care you and your doctor agreed was appropriate, that experience is worth bringing into a conversation about whether your current plan, or a different Medicare Advantage plan, or Medigap alongside Original Medicare, fits your situation better going forward.

What you can do outside of AEP versus during it

The appeal itself is not tied to any enrollment period — you can and should appeal a denial as soon as it happens, following the timeline in your denial notice, regardless of the time of year. Switching to a different plan because of a pattern of prior authorization problems is a separate decision, and that generally happens during the Annual Enrollment Period, October 15 through December 7, for a January 1 effective date. Outside that window, changing plans is more limited unless you qualify for a Special Enrollment Period.

It is worth keeping these two tracks separate in your head: appeal the specific denial now, through the plan's required process, and separately note the experience as something to weigh the next time you are able to compare plans.

Keeping a record helps both tracks

Whether you are appealing a specific denial or deciding whether to switch plans later, it helps to keep a simple record as things happen: the date of each request, what was denied and why, and any calls made to the plan along the way. This is not about building a legal case — it is about having the details straight when you talk to your doctor's office, the plan, or a licensed agent, rather than trying to reconstruct a timeline from memory months later. If you do end up comparing plans during AEP, being able to describe specifically what went wrong, rather than a general sense of frustration, makes that conversation more useful.

The bottom line

Prior authorization is a legitimate tool Medicare Advantage plans use to manage coverage decisions, but it comes with required guardrails: plans must give you a reason for a denial and a specific process to appeal it. Use that process if a request was denied — your doctor's office can often help build the case. If prior authorization keeps getting in the way of care you and your doctor have agreed on, that pattern is a fair reason to compare other plans during the next enrollment period, rather than something you have to simply accept.

For more on prior authorization rules and appeal rights, see Medicare.gov's claims and appeals guidance and CMS's prior authorization initiatives.