Prevention
How to Prevent Prior-Authorization Denials Before They Happen
Prior authorization is the insurer's requirement that certain care be approved before you get it. Skip a step, submit the wrong code, or leave out a clinical note, and a service you're entitled to can be denied — sometimes on paperwork grounds that have nothing to do with your actual medical need. The good news is that most prior-authorization denials are preventable. They fail on the front end: a request that was never submitted, criteria that weren't documented, or a mismatch between the code billed and the plan's medical policy. This guide is a prevention playbook for patients and caregivers — the things you can do in the days before care to keep a denial from ever landing.
It's worth the effort because denials are common and appeals are underused. In Affordable Care Act Marketplace plans, insurers denied about 19% of in-network claims in 2024, yet consumers appealed fewer than 1% of denied claims, according to a 2026 KFF analysis of federal transparency data (KFF, 2026). The cleanest way out of an appeal is to not need one.
Step 1: Find out whether the service actually needs prior authorization
Not everything requires it, and requirements vary widely by plan. Before a scan, procedure, specialty drug, surgery, or durable medical equipment, confirm whether prior authorization applies to your plan for that service:
- Check your plan's prior-authorization list (often called a "pre-authorization" or "pre-certification" list) in your member portal or Evidence of Coverage.
- Call the member-services number on your insurance card and ask directly: "Does CPT/HCPCS code [___] for [service] require prior authorization under my plan?" Get the answer tied to the specific code, not just the service name.
- Ask your provider's office whether they've flagged the service as requiring authorization. Prior authorization is one of the most common administrative tasks in medical practices, and offices track it routinely (American Medical Association).
Write down who told you, when, and what they said. If prior authorization isn't required, note that too — it's your defense if a claim is later denied for "no authorization."
Step 2: Confirm the request was actually submitted — and by whom
A surprising share of "no prior authorization" denials happen because nobody submitted the request, or because each party assumed the other would. The responsible party depends on the service:
- Procedures, imaging, surgery, specialist care: usually the ordering provider's office submits the request.
- Prescription drugs: the prescriber initiates the request, but the pharmacy is often the first to see the rejection at the counter. A pharmacy telling you a drug "needs a PA" is a signal for your prescriber to submit one — the pharmacy typically can't do it for them.
- Specialty/infused drugs: may run through a separate pharmacy-benefit process, so ask which benefit (medical vs. pharmacy) it falls under.
Don't assume. Call the office that's supposed to submit and confirm the request was sent, ask for the date it was submitted and a reference or authorization number, and then verify with your insurer that they received it. Two quick calls now prevent the most avoidable denial there is.
Step 3: Make sure the coding and documentation match the plan's medical policy
Even a submitted request gets denied if the clinical picture doesn't line up with the insurer's criteria. Insurers approve based on their published medical policy for the service — the specific conditions under which they consider it necessary. Denials that turn on medical necessity are a real category, though a smaller one: in KFF's data, only about 5% of in-network denial reasons were based on medical necessity, while a much larger share were administrative (KFF, 2026). To prevent both types:
- Ask your provider's office to confirm the diagnosis (ICD-10) code and procedure (CPT/HCPCS) code that will be submitted, and that they match what's being requested.
- Look up the insurer's medical policy or coverage criteria for the service (many are published online). Note what it requires — for example, a failed first-line therapy, a specific test result, or a documented duration of symptoms.
- Confirm your record actually documents those criteria. If the policy requires that two prior treatments were tried and failed, the chart needs to say so with dates and outcomes.
Step 4: Ask the office to attach clinical notes and cite the plan's criteria up front
The strongest prior-authorization requests don't just ask for approval — they hand the reviewer the evidence and point to the insurer's own rules. When your provider's office submits, ask them to:
- Attach the relevant chart notes, test results, and treatment history rather than a bare request form.
- Cite the plan's medical policy by name and show, point by point, how your case meets each criterion.
- Include a brief letter or statement of medical necessity where the service is likely to be scrutinized.
This front-loading matters because it's the same evidence that wins appeals — so supplying it up front often avoids the denial entirely. Physician data underscores the payoff of engaging on the merits: in Medicare Advantage, more than 80% (83.2% in 2022) of appealed prior-authorization denials were partially or fully overturned, yet only about one in ten denials were appealed at all (American Medical Association, 2024). The evidence that would overturn a denial is the same evidence that prevents one.
Step 5: Time it right — submit early and track the reference number
Prior authorization takes time, and rushing it invites errors and gaps. Give the process room:
- Submit as early as possible before scheduled, non-urgent care so there's time to fix a coding problem or add a missing note before the date.
- Get and record the reference/authorization number and the decision deadline.
- If a delay could seriously harm your health, ask the provider to request an expedited (urgent) review. Medicare, for example, sets tighter timeframes for expedited prior-authorization decisions than for standard ones (CMS).
- Follow up before the deadline. If you haven't heard back, call — don't let a pending request silently lapse.
Step 6: Request a peer-to-peer review if a PA is initially denied
An initial prior-authorization denial isn't the end of the pre-service road. Your treating physician can usually request a peer-to-peer review — a direct conversation with the insurer's reviewing clinician to explain why the care meets criteria. Ask your provider's office to request one promptly, and give them anything that strengthens the case: the specific criteria at issue, the records that satisfy them, and any relevant guidelines. A peer-to-peer can resolve a denial before you ever have to file a formal appeal.
Step 7: Get approvals in writing and keep an appeal-ready file
Verbal approvals evaporate. When authorization is granted, get the authorization number and approval in writing (portal message, letter, or a documented reference), and note what service, codes, provider, and date range it covers. Then keep a personal file so that if a denial happens anyway, you can respond in hours instead of days:
- The authorization number and written approval (or confirmation that no authorization was required).
- A log of every call: date, who you spoke to, reference number, and what was said.
- The codes submitted (ICD-10 and CPT/HCPCS) and the insurer's medical policy for the service.
- Copies of clinical notes and the medical-necessity letter submitted with the request.
- Your denial or approval letters and any Explanation of Benefits.
Pre-service checklist
Run through this in the days before non-urgent care:
- ☐ Confirmed whether the service requires prior authorization for my plan and code
- ☐ Confirmed who is submitting the request (provider vs. pharmacy) and that it was sent
- ☐ Got the submission date and reference/authorization number
- ☐ Verified the insurer received the request
- ☐ Checked that the diagnosis and procedure codes match the request
- ☐ Read the insurer's medical policy and confirmed my records document the criteria
- ☐ Asked the office to attach clinical notes and cite the plan's criteria
- ☐ Requested expedited review if the care is urgent
- ☐ Got the approval (and authorization number) in writing
- ☐ Saved everything in one appeal-ready file
Who does what — and why it prevents a denial
| Step | Who does it | Why it prevents a denial |
|---|---|---|
| Confirm PA is required | You (call insurer) + provider's office | Stops "no authorization" denials for care that did — or didn't — need one |
| Confirm the request was submitted | Provider's office or prescriber; you verify with insurer | Catches requests nobody actually sent, the most avoidable denial |
| Match codes to the request | Provider's billing/office staff | Prevents coding-mismatch and administrative denials |
| Document the medical policy criteria | Treating provider | Heads off "not medically necessary" denials by proving criteria are met |
| Attach notes and cite criteria up front | Provider's office at submission | Gives the reviewer the evidence needed to approve on first pass |
| Request peer-to-peer if denied | Treating physician | Resolves an initial denial before a formal appeal is needed |
| Get approval in writing | You (request from insurer) | Protects you if the claim is later processed as unauthorized |
The bottom line
Most prior-authorization denials are made on the front end — a request that was never submitted, a code that didn't match, a criterion that wasn't documented. You can close each of those gaps before care happens: confirm whether authorization is required, confirm it was actually submitted and by whom, make sure the coding and documentation match the plan's medical policy, ask the office to attach evidence and cite criteria, submit early with a tracked reference number, use peer-to-peer if the first answer is no, and get every approval in writing. Do that, and the appeal you're prepared for is usually the appeal you never have to file.
If a prior authorization is denied anyway: AppealAngle turns your denial letter and records into a complete, deadline-aware appeal packet you review and file yourself.