A prior authorization (PA) is your insurer's approval before a pharmacy can dispense a medication. Your prescriber's office sends the clinical justification, the plan reviews it, and the pharmacy fills the prescription once the answer comes back — approved. It is one of the most common reasons a prescription sits waiting, and it is entirely navigable when you know who owns each step.
Here is how the process works, how long it is supposed to take, and what speeds it up.
Why plans require prior authorization
Prior authorization exists so a plan can confirm three things before paying: the drug is medically necessary for your diagnosis, a documented alternative has been tried or ruled out when the plan requires it, and the prescribing fits the plan's formulary rules.
In practice it applies most often to brand-name drugs, specialty therapies, and medications with a comparable lower-cost alternative. Some plans also use step therapy — trying the preferred drug first — and quantity limits. None of these rules are about your prescriber's judgment; they are the plan's benefit design applied to your case.
Who does what
A prior authorization has four sets of hands on it. When any one of them stalls, the prescription stalls.
- Your prescriber's office submits the clinical form: diagnosis, prior treatments, and why this medication is the right one. Incomplete clinical notes are the single biggest cause of delay.
- The pharmacy provides the dispense details, confirms coverage, and follows the request through to a decision — and tells you what is actually happening instead of "it's pending."
- The plan's clinical reviewers approve, deny, or request more information. Under federal rules, denials must now come with a specific reason rather than a form letter.
- You answer the phone when the plan or prescriber's office calls, and — if the answer is no — decide whether to appeal.
How long it's supposed to take
Federal rules now put a clock on it. The CMS Interoperability and Prior Authorization final rule (CMS-0057-F) requires impacted Medicare Advantage organizations, Medicaid managed care plans, CHIP programs, and marketplace plans to decide expedited requests within 72 hours and standard requests within 7 calendar days, to give a specific reason for every denial, and to stand up electronic prior-authorization APIs by January 1, 2027. The decision timeframes have applied since January 1, 2026.
Commercial employer plans write their own timelines, which is why we never quote a number we cannot verify for your specific plan.
The paperwork behind it is not trivial either: physician surveys from the American Medical Association have consistently ranked prior authorization near the top of administrative burdens, with practices reporting more than a dozen hours of staff work per physician each week — plus reports of therapy being abandoned when approvals drag.
How ExpressRx keeps it moving
We treat prior authorizations as a tracked workstream, not a sticky note:
- Submission, then follow-up. We confirm the plan received the request and chase it at defined intervals — not once, and not "whenever."
- Direct line to your prescriber. If the plan needs a specific diagnosis code, a documented trial, or records, we route that request to your prescriber's office the same day instead of letting it sit.
- Status you can actually get. Call (614) 495-9097 and you get a real status: submitted, pending, information requested, approved, or denied — with the date of each.
- Appeals support. If a request is denied, we tell you the stated reason and what your prescriber would need to send for an appeal or a therapeutically equivalent alternative.
Providers referring patients get the same discipline — see how we handle referrals and prior authorizations for practices.
What you can do to shorten it
- Give your prescriber the full picture. Prior authorizations are approved on documentation: prior medications tried, reactions, and the diagnosis behind the request.
- Ask about alternatives up front. A quick conversation about what the plan prefers can save a week — and may produce an option that works just as well for you.
- Answer calls immediately. Plans often need one piece of information from you — a medication history or a pharmacist call — and that is where requests quietly wait.
- Appeal a denial rather than abandoning therapy. Ask for the denial in writing; many reversals succeed once clinical notes are attached.
- Watch the expiration. Approvals are granted for a window, not forever. Sync your refills so a lapsed approval surfaces before your supply runs out — see how med sync helps.
Waiting on an approval?
Call (614) 495-9097 for a real status on your prior authorization — submitted, pending, or approved — and we will tell you exactly what happens next.
How to read a denial letter
Denials are not all the same, and the reason on the letter tells you exactly which response will work:
- "Not on formulary" or "non-preferred." The drug exists but is not on your plan's covered list. The move is a formulary exception request — your prescriber asks the plan to cover it because the covered alternatives do not fit. Document why the preferred alternatives failed, not just that you would prefer this one.
- "Step therapy required." The plan wants a cheaper drug tried first. If you already tried it — or it is unsafe for you — your prescriber supplies the history and the step is waived. If you have not tried it, the plan is asking you to; there is no appeal around an untried step, only a medical-necessity argument against it.
- "Quantity limit." The plan caps how much can be dispensed at once. Often resolved by a quantity exception if the dose justifies it, or sidestepped entirely by adjusting the days' supply on the claim.
- "Insufficient clinical information." Not a real denial — a request for more documentation. This is the most common and most fixable category. Send the chart notes and the request is usually approved.
- "Does not meet medical necessity criteria." The hard one. It means the plan's clinical criteria were not satisfied, and it requires a written appeal with specifics: diagnosis, prior therapies tried and failed, and why no covered alternative works. A peer-to-peer conversation is often where this turns around.
Under current federal rules, impacted Medicare Advantage, Medicaid, and marketplace plans must give a specific reason with every denial — not boilerplate. Use it. A letter without a citable reason gives your prescriber nothing to rebut.
What a smooth prior authorization looks like
A worked timeline, so you know what "on track" means:
- Day 0 — the office submits. Complete form, diagnosis code, medication and dose, signature. Incomplete submissions are the single largest cause of delay.
- Day 1 — the pharmacy sees it too. We check the claim, confirm whether it is pending or bounced back for a different reason (a rejected claim and a pending PA are different problems), and tell you which one you actually have.
- Days 1–3 — the plan reviews. Standard decisions under the CMS rule land within 7 calendar days; expedited requests within 72 hours when waiting would jeopardize health. Commercial plans publish their own timeframes — ask for them.
- If information is requested — the clock often pauses while the plan waits for the office's response. This is the quiet phase where nobody calls anybody for four days. A pharmacy tracking the request catches it.
- Decision — approve, deny, or partial approval. Sometimes the plan approves a different quantity or a nearby duration. We tell you what changed instead of just what happened.
Three patient moves make this faster: give your prescriber's office a working phone number on the form, call the pharmacy a day after submission for a status check, and ask for the reference number when the plan calls you. Prior authorizations stall in silence more often than they stall on arguments.
Frequently asked questions
What is a prior authorization?
A prior authorization is your insurer's approval before a pharmacy can dispense a medication. Your prescriber's office submits clinical documentation to the plan, and the plan either approves, denies, or asks for more information. It is common for brand-name, specialty, and certain high-cost drugs.
How long does a prior authorization take?
Under the CMS Interoperability and Prior Authorization final rule (CMS-0057-F), impacted Medicare Advantage, Medicaid, CHIP, and marketplace plans must decide expedited requests within 72 hours and standard requests within 7 calendar days. Commercial plans vary, but many follow similar timeframes.
Who submits the prior authorization?
The prescriber's office submits the clinical form, while the pharmacy typically sends coverage and dispensing details and follows up on status. At ExpressRx we track every prior authorization from submission to decision so nothing goes quiet.
What happens if my prior authorization is denied?
You and your prescriber can appeal. Most denials hinge on documentation — showing that no comparable covered alternative fits your situation. Ask for the denial reason in writing and respond with your prescriber's supporting notes.
Does a prior authorization expire?
Usually yes. Approvals are typically granted for a set period — often the plan's standard approval window — after which your prescriber must renew. Synchronizing your refills helps you notice an expiring approval before you run out.
