Medicare Advantage Prior Authorization Rules

A treatment can be medically necessary, recommended by your doctor, and covered by your Medicare Advantage plan - yet still require the plan's approval before it happens. That approval process is called prior authorization. Understanding Medicare Advantage prior authorization rules can help you avoid a surprise delay when you need an MRI, a skilled nursing stay, home health care, certain medications, or another service.

Prior authorization is not a reason to put off needed care. It is a reason to ask the right questions early, keep good records, and make sure someone is following the request through to a decision. For older adults and caregivers, the goal is simple: protect access to care while protecting your right to a fair coverage decision.

What Prior Authorization Means in Medicare Advantage

Medicare Advantage plans are offered by private insurance companies that contract with Medicare. They must cover all medically necessary Medicare-covered services, except hospice care, which Original Medicare covers. But unlike Original Medicare, many Medicare Advantage plans use prior authorization for selected services, supplies, and prescription drugs.

The plan is asking for clinical information before it agrees to pay. Your physician, hospital, pharmacy, or other provider usually sends records explaining why the service is needed. The plan then reviews the request against Medicare coverage standards and its own approved coverage policies.

Prior authorization does not mean a service will automatically be denied. It also does not mean your doctor has done anything wrong. It is an administrative checkpoint. Still, it can become a serious problem when a request is incomplete, sent to the wrong department, delayed, or denied without a clear explanation.

Plans cannot use prior authorization simply to make care harder to receive. Medicare rules require plans to follow Medicare coverage criteria. They generally must rely first on national coverage rules and applicable local coverage rules. When those do not address a service, a plan may use internal criteria, but those criteria must be based on current evidence and cannot be more restrictive than Medicare's coverage standards.

Which Services May Need Approval

Every plan has its own current prior authorization list, so never assume that a service will be handled the same way by every insurer or every plan. A benefit that required approval this year may not require it next year, and the reverse can also be true.

Common services that may require prior authorization include advanced imaging such as MRIs and CT scans, outpatient surgery, certain infusions, durable medical equipment, home health services, skilled nursing facility care, rehabilitation therapies, and some specialty medications. Part B drugs administered in a clinical setting and Part D prescription drugs can each have their own coverage requirements.

Network rules matter, too. A referral to a specialist and prior authorization are not the same thing. Some HMO plans require both. A referral directs you to a specialist; prior authorization is the plan's approval of a particular service or treatment. If you are in a PPO, you may have more flexibility to see out-of-network providers, but out-of-network care can cost more and may still require plan approval. Emergency care is treated differently and should not be delayed while someone waits for prior authorization.

Medicare Advantage Prior Authorization Rules and Timelines

For a standard prior authorization request, a Medicare Advantage plan generally must make its decision within 14 calendar days after receiving the request. For an expedited request, the plan generally has 72 hours. An expedited decision is appropriate when waiting for the standard timeline could seriously jeopardize your life, health, or ability to regain maximum function.

The plan may sometimes extend the timeframe, but it must have a valid reason, such as needing more medical information, and it must notify you. If your provider believes your condition requires a faster answer, ask the provider to clearly request an expedited review and explain the medical urgency in the records.

When a request is approved, ask whether the approval applies to a specific provider, facility, number of visits, dosage, or date range. An approval for six therapy visits is not necessarily approval for a longer course of treatment. Put the authorization number, expiration date, and any limits in a safe place.

When a request is denied, the plan must send a written notice explaining why. Do not settle for a vague statement that a service was "not medically necessary." The notice should identify the coverage rule or criteria used and explain how to appeal. This letter is the starting point for protecting your rights.

What Happens When You Change Plans

Changing Medicare Advantage plans during Annual Enrollment can create a continuity-of-care concern, particularly if you are in the middle of treatment. You might be seeing a specialist regularly, receiving infusion therapy, using equipment, or recovering from surgery when the new plan begins on January 1.

Federal Medicare rules give many members a transition period for an active course of treatment that was previously authorized by their old plan. In general, a new Medicare Advantage plan must provide at least 90 days of coverage for that active treatment while it evaluates the request under its own rules. The protection can be especially valuable when your provider is not in the new plan's network or when the new plan uses different authorization requirements.

This is not a reason to wait until January to investigate. Before enrolling, verify whether your doctors, facilities, and prescriptions are covered. If you are receiving ongoing treatment, ask the new plan how it will handle continuity of care, what paperwork it needs, and whether your current authorization can be reviewed before the coverage effective date.

If an Authorization Is Denied or Delayed

A denial is not always the final answer. Many denials turn on missing documentation, an incorrect billing code, a lack of detail about prior treatments, or a mismatch between the request and the plan's stated criteria. Your doctor may be able to correct the problem quickly, but someone needs to identify the actual reason for the denial.

Take these steps promptly:

• Read the denial notice and note the appeal deadline, the reason given, and the evidence the plan says is missing.

• Call your provider's office and confirm it received the notice. Ask who is handling the appeal and when it will be submitted.

• Request an expedited appeal if waiting could harm your health or functioning.

• Keep copies of clinical notes, test results, authorization numbers, dates, names, and every letter from the plan.

• Ask for help from a trusted family member, caregiver, Senior Medicare Patrol resource, State Health Insurance Assistance Program counselor, or an experienced advocate if the process becomes overwhelming.

A plan's first-level appeal is called reconsideration. If the plan continues to deny coverage, the case may move to an independent review organization. Additional appeal levels may be available depending on the type and value of the service. The paperwork can feel intimidating, but deadlines matter. Responding quickly gives you more options.

Questions to Ask Before Care Is Scheduled

The best time to address prior authorization is when your doctor first recommends a service, not the day before an appointment. Ask the office, "Does my Medicare Advantage plan require prior authorization for this?" Then ask whether the provider has submitted it, what supporting records were included, and how you will be notified of the decision.

If the service involves a facility, confirm that both the provider and the facility are in network when your plan requires network care. For example, a surgeon may participate in your plan while the surgery center does not. For medications, ask whether there is a formulary alternative, step therapy requirement, quantity limit, or exception process. A prescription that is covered in principle can still face a coverage barrier at the pharmacy.

It is also wise to review your plan's authorization rules during each Annual Enrollment Period. Plan benefits, provider networks, drug formularies, and utilization-management rules can change from year to year. The lowest premium is not automatically the best value if it creates barriers to the physicians and treatments you rely on.

Keep the Focus on Your Care

Prior authorization is one of the reasons Medicare Advantage enrollment should never be treated as a quick transaction. The right plan depends on your doctors, medications, expected care needs, budget, and willingness to work within a network and approval process. A plan may be a good fit for one neighbor and a poor fit for someone managing a complex condition.

Secure65HealthPlans believes seniors deserve clear answers before a coverage decision affects their health. If an authorization issue arises, stay persistent, involve your care team, and ask for the written information you need. Your health care should be guided by medical need and informed choices - not confusion or silence.