Prior authorization refers to the approval your health plan requires before covering a service, medication, or procedure — typically takes 24 to 72 hours for urgent requests and several business days for standard ones.
CMS rules now require certain impacted payers to respond within 72 hours for expedited requests and 7 calendar days for standard requests, though real-world timelines vary by plan type, drug, and documentation completeness.
A clean, complete submission often clears in a few days. A messy one can stretch into weeks. Hence, in this guide, we’ll be exploring:
- Timelines broken down by care type
- What happens if your prior authorization gets denied
- Why your request might be stuck and what to do about it
- The three separate “clocks” that determine your actual wait
- Phone scripts for calling your doctor, insurer, and pharmacy
How long does prior authorization take by type of care?
The short answer depends on what you need approved. A prescription fills faster than a complex surgical request, and an urgent case moves more quickly than a routine one.
The table below reflects federal rules, payer data, and published study results.
| Request type | Typical timeframe | Common delay triggers |
| Prescription medication | 24-72 hours | Missing diagnosis, formulary rules, step therapy |
| Urgent or expedited request | 24-72 hours | Payer disagrees the case qualifies as urgent |
| Imaging (MRI, CT, PET) | 2-5 business days | Incomplete clinical notes, radiology benefit manager review |
| Outpatient procedure | 3-10 business days | Medical necessity review, prior treatment history |
| Specialty medication (biologics, GLP-1s) | Several days to several weeks | High cost, lab requirements, diagnosis proof |
| Inpatient or surgical | 3-14 calendar days | Peer-to-peer review, continued stay review |
| Appeal after denial | Days to 30+ days | Plan rules, state law, external review timelines |
A 2025 study in JAMA Network Open tracked radiation oncology authorizations and found a median processing time of 4.2 business days before workflow software and 2.8 business days after, with 90th-percentile cases stretching to 17.7 and 10.5 business days, respectively.
That spread illustrates why “a few days” is accurate for most people but misleading for the unlucky minority.
In practice, the biggest source of confusion is when the clock actually starts. Federal deadlines count from the moment the payer receives a complete submission — not when your doctor writes the prescription or when you leave the pharmacy counter empty-handed.
Why does the timeline vary so much?
Three separate clocks run between the moment you’re told “this needs prior authorization” and the moment you actually receive care. Most delays happen because patients (and even some provider offices) treat them as one.
Clock 1 — Provider submission
Your doctor’s office gathers clinical documentation, diagnosis codes (ICD-10), procedure codes (CPT or HCPCS), chart notes, lab results, and medication history before submitting the request.
Some offices send electronic prior authorizations (ePA) within hours. Others rely on fax, which adds a day or more — and introduces the risk that paperwork never arrives.
A common mistake is assuming the request is “with insurance” the same day your doctor orders the service. Ask the office directly whether the PA has been submitted and whether they sent it electronically or by fax.
Clock 2 — Insurer review
The payer’s utilization management team evaluates whether the requested care meets the plan’s clinical criteria and coverage policy.
For standard requests, CMS-impacted payers have 7 calendar days to respond. For expedited cases, the window shrinks to 72 hours. Medicare Part D prescription requests follow tighter deadlines — 24 hours expedited and 72 hours standard after the plan receives supporting documentation.
During this phase, the insurer may request additional records, trigger a peer-to-peer review between your doctor and a payer medical director, or flag the request for step therapy requirements. Each of those adds days.
Clock 3 — Pharmacy or facility processing
An approval sitting in the insurer’s system doesn’t automatically mean your medication is ready at the pharmacy or your surgery is on the schedule.
The pharmacy may need to rerun the claim. The facility may need the authorization number. A short delay here feels disproportionately frustrating because you’ve already waited through clocks 1 and 2.
How long does prior authorization take for specific medications?
Medication prior authorizations handled through electronic systems (often processed by pharmacy benefit managers like CVS Caremark, Express Scripts, or Optum Rx) tend to clear faster than medical service requests. But certain drug categories face extra scrutiny.
GLP-1 medications (Wegovy, Zepbound, Mounjaro)
Plans frequently require documentation beyond a simple prescription for GLP-1 receptor agonists. Expect the insurer to ask for some or all of the following before approving coverage.
- Lab results (A1C, metabolic panel)
- BMI documentation and related comorbidities
- Step therapy history showing previously tried treatments
- Diagnosis confirmation (type 2 diabetes vs. weight management)
- Formulary status verification (some plans exclude weight-loss indications entirely)
Patient reports range from under 24 hours to several weeks — with most delays tied to missing records, step therapy disputes, or formulary exclusions rather than slow insurer review.
Controlled and specialty medications
Drugs like Adderall, testosterone, and specialty biologics may trigger additional review layers.
- Age or quantity limit checks
- Lab history and diagnosis-specific criteria
- Specialist confirmation (psychiatrist, endocrinologist)
- Specialty pharmacy coordination (Accredo, Optum Specialty)
Specialty medications processed through specialty pharmacies often involve a parallel enrollment and benefits investigation step that adds several days beyond the standard PA timeline.
How do you check if your prior authorization was approved?
An authorization can sit approved in the insurer’s system while the pharmacy still shows “requires authorization.” Checking multiple sources eliminates that gap.
- Log in to your insurer’s member portal and look for a PA status section
- Call the number on the back of your insurance card and ask for the PA department
- Ask your pharmacy to rerun the claim (approvals sometimes don’t auto-populate)
- Check your pharmacy app for status updates (“ready,” “delayed,” or “insurance issue”)
- Contact your doctor’s office and ask whether they received a decision
Look for an approval letter, portal notification, text alert, or automated phone call. And keep in mind that approval means the plan agrees to cover the service under its rules — your copay, deductible, and coinsurance still apply. HealthCare.gov notes that preauthorization is not a promise that the plan will cover the full cost.
How can you speed up a prior authorization?
The fastest way to shorten the wait is to prevent the delays that extend it. Most stalled requests are stuck because of missing information, not slow reviewers.
Confirm submission
Call your doctor’s office and use this language.
“I’m checking on the prior authorization for [medication or service]. Has it been submitted to my insurance? If yes, what date was it sent, and was it electronic or fax?”
Ask the insurer what’s missing
Call your plan and ask directly.
“Can you tell me whether the request is pending, approved, denied, or waiting for more information from my provider?”
If the payer needs additional clinical documentation, relay that to your doctor’s office the same day. Every round trip between insurer and provider can add 2-5 business days.
Request expedited review
Expedited prior authorization applies when a delay could seriously harm your health — not because you’d prefer a faster answer.
If your doctor believes the case qualifies, they can submit an urgent request. CMS requires impacted payers to respond within 72 hours for expedited requests.
Keep a call log
A simple tracking table prevents the most common frustration — repeating the same conversation because nobody remembers the last one. It could include:
- Date
- Next step
- What they said
- Reference number
- Who you contacted
What causes prior authorization to take too long?
When a PA drags past the expected window, one of these bottlenecks is usually responsible.
The pattern worth recognizing is that most PA delays are documentation problems, not review-speed problems.
The insurer’s 7-day clock pauses when they request more records — and restarts when they receive them. One missing lab result can turn a 3-day approval into a 2-week wait.
What happens if prior authorization is denied?
KFF found that Medicare Advantage plans made 52.8 million prior authorization determinations in 2024, with 7.7% fully or partly denied.
Of those denials, only 11.5% were appealed, but 80.7% of the appealed denials were partly or fully overturned. That means most people who fight a denial win, yet the vast majority never try.
Start by reading the denial letter carefully. Common denial reasons include the following.
- Quantity limit exceeded
- Step therapy not completed
- Drug not on the plan’s formulary
- Out-of-network provider or facility
- Service not deemed medically necessary
- Incomplete or missing clinical documentation
Resubmission vs. appeal vs. external review
A resubmission corrects errors or adds missing documentation to the original request.
An internal appeal formally challenges the denial through the plan’s review process. An external review takes the dispute to an independent third party — typically available after the internal appeal is exhausted.
The strongest appeals include specific supporting evidence.
- Updated diagnosis and lab results
- Specialist notes explaining clinical necessity
- Medication history showing failed alternatives
- A medical necessity letter from the treating physician
- Documentation of allergies or adverse reactions to preferred drugs
Appeal timelines vary. Internal appeals for non-urgent cases often take 30 days.
Expedited appeals for urgent situations may be decided within 72 hours. State laws add their own deadlines on top of federal rules.
Does timing depend on your insurance type?
Federal CMS rules (under CMS-0057-F) apply to Medicare Advantage plans, Medicaid managed care, CHIP, and Marketplace qualified health plans beginning in 2026.
Commercial employer-sponsored plans may follow different timelines set by their contracts.
Medicaid timelines depend heavily on state rules and whether the patient is in a managed care plan or fee-for-service.
BCBS plans are managed by different regional companies, so one BCBS member may have a 3-day turnaround while another waits 10 days for the same drug.
Always check your specific plan’s member services number rather than relying on a national average.
The AMA’s 2024 physician survey found that 93% of physicians reported prior authorization delays access to necessary care — a reminder that even when formal deadlines exist, the administrative burden on both sides of the process introduces real treatment delays.
Prior authorization checklist before you call
Have these details ready before contacting anyone about a PA.
- Diagnosis, if known
- Denial letter (if applicable)
- Date prescribed or ordered
- Medication or procedure name and dosage
- Pharmacy or facility name and phone number
- Names and reference numbers from previous calls
- Prior authorization reference number (if one exists)
- Prescribing or ordering the provider’s name and NPI
- Insurance card (member ID, group number, phone number)
Need faster prior authorization approvals and fewer denials? Trust MedHeave to handle eligibility checks, documentation, submissions, and payer follow-ups so your staff can focus on patient care.
Frequently asked questions
Here are some commonly asked questions on this topic:
Most preauthorizations clear within a few days once the insurer receives a complete request. Urgent cases are typically decided within 24-72 hours, while standard medical services may take 3-10 business days, depending on the plan, service type, and documentation completeness. Complex specialty drug requests and appeals can push well beyond that window.
Wegovy prior authorization timing varies widely by plan. Some requests are clear in a few days when the documentation is complete. Delays are common when the insurer requires BMI records, comorbidity documentation, step therapy history, or proof that the drug is covered under the specific plan’s formulary. Appeals for denied Wegovy requests can add weeks.
Medicaid PA timelines depend on the state, managed care organization, urgency level, and treatment type. Some state Medicaid plans process routine drug requests within 24-72 hours, while others take longer for medical services. Contact your state Medicaid plan or managed care member services number for plan-specific deadlines.
A pending PA usually means one of a few things — the provider hasn’t submitted it yet, the insurer requested additional documentation, the wrong diagnosis or procedure code was used, the plan requires step therapy history, or a peer-to-peer review is pending. Ask both your doctor’s office and your insurer where the request stands.
Request the denial reason in writing. Depending on the reason, your provider can resubmit with corrected information, file a formal appeal, request a peer-to-peer review with the payer’s medical director, or discuss a covered alternative. Most appealed denials are at least partially overturned — but you have to act within the plan’s appeal deadline.
Confirm your doctor submitted the request, call your insurer to check if anything is missing, ask the pharmacy to rerun the claim after approval is recorded, and determine whether your case qualifies for expedited review. Keep a call log with dates, contact names, and reference numbers for every interaction.
