How to Get a Prior Authorization Approved (Faster)

Your doctor says you need an MRI. Or a specialist referral. Or a specific medication. Then comes the phrase that makes every patient's heart sink: "We'll need to get a prior authorization from your insurance."

What follows is often weeks of waiting, phone calls, faxes (yes, faxes — in 2026), and sometimes a denial that makes no medical sense. Prior authorization is the bureaucratic checkpoint between you and the care your doctor has already decided you need.

But here's what most patients don't know: you can influence this process. You can speed it up, improve your odds of approval, and fight back effectively when you're denied. This guide shows you how.

What Is Prior Authorization?

Prior authorization (also called pre-authorization, pre-cert, or pre-approval) is a requirement by your health insurance company to approve certain medical services, procedures, or medications before they're provided. If you skip the prior auth and get the service anyway, your insurer can refuse to pay — leaving you with the entire bill.

Insurance companies say prior auth exists to ensure treatments are "medically necessary" and to prevent unnecessary spending. Critics — including the American Medical Association — argue it's primarily a cost-containment tool that delays care and harms patients.

Regardless of where you stand, the system exists, and you need to navigate it.

What Typically Requires Prior Authorization?

Every insurance plan has its own list, but common triggers include:

• Advanced imaging — MRIs, CT scans, PET scans
• Specialist referrals — Especially with HMO plans
• Non-emergency surgeries — Joint replacements, bariatric surgery, spinal procedures
• Specialty medications — Biologics, cancer drugs, high-cost prescriptions
• Durable medical equipment — CPAP machines, wheelchairs, prosthetics
• Mental health and substance abuse treatment — Inpatient stays, intensive outpatient programs
• Physical therapy — Often after a set number of visits
• Home health services
• Genetic testing

Your plan's formulary determines which medications require prior auth. Your plan documents (Summary of Benefits and Coverage) list which services need pre-approval.

The Prior Authorization Process: How It Works

1. Your doctor determines you need a service.
2. Your doctor's office submits a prior auth request to your insurance company. This typically includes clinical notes, diagnosis codes, and justification for the service.
3. The insurance company reviews the request. A utilization review nurse or medical director evaluates whether it meets their criteria for medical necessity.
4. A decision is made: Approved, denied, or "pended" for more information.

Timeline: Insurance companies generally must respond within:

• Standard requests: 15 calendar days (for most services under ACA plans)
• Urgent/expedited requests: 72 hours (or 24 hours in some states)
• Prescription medications: 72 hours standard, 24 hours urgent

In practice, delays beyond these timelines are common. Requests for additional documentation, internal processing backlogs, and communication failures between providers and insurers can stretch the process significantly.

How to Speed Up Your Prior Authorization

1. Ask Your Doctor's Office to Submit It Immediately

Don't assume your doctor's office filed the prior auth the same day they saw you. Busy offices can take days or even weeks to submit requests. Call the next business day to confirm it's been submitted and ask for the reference number.

2. Call Your Insurance Company to Confirm Receipt

Once submitted, call the number on your insurance card and verify they received the request. Ask:

• Has the prior authorization request been received?
• What is the reference/case number?
• Is any additional information needed?
• What is the expected decision date?
• Is this being reviewed as standard or urgent?

Write down every detail: Date, time, representative's name, reference number. This documentation becomes invaluable if you need to appeal later.

3. Request an Expedited/Urgent Review When Appropriate

If waiting the standard timeline could harm your health — increased pain, disease progression, risk of complications — ask your doctor to request an expedited review. Insurers must process urgent requests within 24–72 hours.

Your doctor can mark the request as urgent if:

• Delay could seriously jeopardize your life or health
• You're in severe pain
• The condition could worsen significantly during the waiting period

4. Make Sure the Submission Is Complete

The #1 reason prior auths are delayed? Incomplete submissions. Missing clinical notes, wrong diagnosis codes, or insufficient documentation of medical necessity. Work with your doctor's office to ensure:

• All relevant medical records are attached
• The diagnosis codes (ICD-10) match the requested service
• Clinical notes explain why this specific treatment is needed
• Conservative treatments already tried (and failed) are documented

5. Know Your Insurance Company's Specific Criteria

Insurance companies publish their medical policies — the specific criteria they use to determine medical necessity. These are often available on the insurer's website under "Clinical Policy Bulletins" or "Medical Coverage Guidelines."

If you can find the criteria for your specific service, you (and your doctor) can ensure the submission addresses every required point. This dramatically improves approval odds.

6. Follow Up Relentlessly

Don't submit and forget. Set calendar reminders to check status every 3–5 business days. Each time you call, note the date, representative, and any updates. Persistent follow-up signals that someone is watching the case, which can prevent it from languishing in a queue.

What to Do If Your Prior Authorization Is Denied

A denial is not the end. It's the beginning of the appeals process — and appeals succeed more often than people think.

Step 1: Get the Denial in Writing

Your insurer must provide a written denial letter explaining:

• The specific reason for denial
• The clinical criteria they used
• Your right to appeal
• The deadline for filing an appeal

Step 2: Understand Why It Was Denied

Common denial reasons include:

• "Not medically necessary" — The insurer disagrees with your doctor's clinical judgment
• "Alternative treatment available" — They want you to try something cheaper first (step therapy)
• "Out of network" — The provider isn't in your plan's network
• "Incomplete documentation" — Missing records or justification
• "Experimental/investigational" — They don't consider the treatment proven

Step 3: File an Internal Appeal

You have the right to at least one level of internal appeal. For this appeal:

• Ask your doctor to write a peer-to-peer letter — a detailed clinical justification addressed to the insurance company's medical director
• Include medical literature supporting the treatment
• Document failed alternative treatments
• Reference the insurer's own criteria and explain how you meet them

Many insurers also offer a peer-to-peer phone call where your doctor speaks directly with their medical director. These calls often resolve denials on the spot — insist on one if available.

Step 4: Request an External Review

If the internal appeal fails, you have the right under the ACA to an independent external review. An outside medical expert reviews your case with no financial ties to the insurance company. External reviews overturn denials in roughly 40–60% of cases.

Your denial letter will include instructions for requesting an external review. There's usually a 4-month deadline after the internal appeal decision.

Step 5: File a Complaint

If you believe the denial is inappropriate, file a complaint with your state's Department of Insurance. Regulators can intervene on your behalf and investigate patterns of inappropriate denials.

New Rules Making Prior Auth Easier (CMS Final Rule)

The Centers for Medicare and Medicaid Services (CMS) has issued rules requiring insurance companies to:

• Respond faster — 72 hours for urgent requests, 7 days for standard (down from 15 for some plans)
• Provide specific reasons for denials, not vague form letters
• Report denial rates publicly — so you can see how often each insurer denies prior auths
• Implement electronic prior auth — reducing fax-and-phone delays

These rules are rolling out over 2025–2027. They apply directly to Medicare Advantage, Medicaid managed care, and ACA marketplace plans. Check whether your specific plan is covered.

Tips for Specific Situations

Prior Auth for Medications

If your medication requires prior auth, ask your doctor about:

• Step therapy exceptions — If you've already failed the cheaper alternative, document it
• Samples or patient assistance programs — To bridge the gap while waiting for approval
• Pharmacy overrides — Some pharmacies can process a temporary supply while the prior auth is pending

Prior Auth for Surgery

Surgical prior auths tend to be more complex. Ensure your surgeon's office includes:

• Documentation of conservative treatments tried and failed (physical therapy, injections, etc.)
• Imaging results supporting the surgical indication
• The specific CPT codes for the planned procedure
• Confirmation that all providers involved are in-network

Prior Auth for Mental Health

Mental health prior auths are subject to the Mental Health Parity and Addiction Equity Act. Insurers cannot apply stricter prior auth requirements to mental health services than they do to comparable medical services. If you suspect a parity violation, document it and include it in your appeal.

Protect Yourself: A Prior Auth Checklist

• ✅ Confirm your service requires prior auth before the appointment
• ✅ Verify submission with your doctor's office within 24 hours
• ✅ Call your insurer to confirm receipt and get a reference number
• ✅ Request expedited review if medically appropriate
• ✅ Follow up every 3–5 business days
• ✅ Document every call — date, time, name, details
• ✅ Get the approval number in writing before scheduling your service
• ✅ Confirm the approval covers the specific procedure, provider, and facility
• ✅ Note the expiration date — approvals typically expire in 30–90 days

The Bottom Line

Prior authorization is frustrating, but it's not insurmountable. The patients who get approvals fastest are the ones who stay informed, follow up persistently, and make sure their submissions are complete and well-documented.

If you're denied, don't accept it quietly. Appeal. Request a peer-to-peer review. Escalate to an external review. The system is designed to make it hard — but not impossible — to fight back. And the data shows that patients who do fight back win more often than they lose.

Need help understanding what your insurance plan covers before you need a prior auth? Use Taven's plan comparison tool to understand your benefits, or compare care costs to find the most cost-effective providers in your area.