Your Doctor Ordered It. Your Insurer Has to Approve It First. Here Is What the Numbers Show.

Your doctor says you need a test, a medication, or a procedure. Then a message arrives from your insurer: wait. Before the care happens, someone behind the scenes has to approve it. That step is called prior authorization, and most people only learn its name after something gets stuck.

Here is what the data shows, what is changing, and what to ask.

How big is it?

KFF counted 52.8 million prior authorization decisions made by Medicare Advantage insurers in 2024. About 4.1 million of them (7.7%) were denied in whole or in part, according to KFF’s January 2026 analysis.

Then comes the number that should stop you: only 11.5% of denied requests were appealed. Of the appeals that were filed, 80.7% were partly or fully overturned.

KFF’s figures do not explain why so few people appeal, and they do not say what the denied care was. KFF notes that CMS does not report requests or denials by type of service or by plan. That limits what anyone outside the system can learn.

What we can say: when a denial is challenged, it often does not hold. Most people never challenge it.

What delays do to patients

The American Medical Association surveyed 1,000 physicians in its 2025 Prior Authorization Physician Survey, released May 13, 2026. Their answers:

• 95% said prior authorization delays access to necessary care.
• 79% said patients abandon treatment because of authorization challenges.
• 26% said it led to a serious adverse event, such as hospitalization, permanent impairment, or death.
• Practices handle about 40 requests a week, using about 13 hours of physician and staff time.

This is a physician organization reporting what its members told it, so read it as the view from the exam room, not a count of every case. It is still consistent with what many patients describe.

What the new federal rules change

CMS finalized a prior authorization rule in January 2024. It applies to Medicare Advantage plans, Medicaid and CHIP programs, and marketplace plans on the federal exchanges. The key pieces:

• Decision deadlines: 72 hours for urgent requests and 7 calendar days for standard ones, starting primarily in 2026. Marketplace plans on the federal exchanges are not held to these deadlines.
• A specific reason for every denial, so you and your doctor can fix the request or appeal it.
• Public reporting of prior authorization metrics.
• Electronic prior authorization systems by January 1, 2027.

In June 2025, about 60 insurers also pledged to simplify prior authorization and to have a qualified clinician review every medical necessity denial. In the AMA survey, only 33% of physicians believed the pledge will make a meaningful difference, and only 24% said denial reviews are consistently done by appropriately qualified clinicians.

Rules on paper are a start. Whether they reach your pharmacy counter is the question.

The Back Office View

A prior authorization request passes through people you never meet. A staff member at your doctor’s office gathers records and submits the request. A reviewer at the insurer decides. If it is denied, your doctor may be offered a “peer-to-peer” call with the insurer’s reviewer. Each handoff is a place for delay, and no one hands you a map of it.

Five questions to ask

1. Has my doctor’s office submitted the request, and when? Ask for the date.
2. What is the reference number?
3. If it is denied, what is the specific reason? Ask for it in writing. The CMS rule requires a specific reason from the plans it covers.
4. What is the deadline to appeal, and who is filing it? The deadline is in your denial letter. Ask your doctor’s office whether they will send a letter explaining why the care is medically necessary.
5. Can this be reviewed as urgent? If waiting could seriously harm your health, ask for an expedited review.

If you have Medicare, your State Health Insurance Assistance Program (SHIP) offers free, unbiased help with appeals.

What MB will keep asking

Who is denied most often, by service, language, disability, race, and plan? The public numbers do not say. Until they do, patients and families have to keep their own records.

This article is for general information and is not legal or medical advice. Figures are from KFF (Medicare Advantage, 2024), the AMA 2025 survey, and CMS as of the dates cited.

Sources: KFF · AMA · CMS