How long does an insurance appeal take? The real timeline

The deadlines insurers must hit

Once you file an internal appeal, the clock starts. The Affordable Care Act and Department of Labor regulations set hard outer limits on how long your insurer can take to decide, and those limits depend on the timing of the care.

• Pre-service appeal — 30 calendar days. You haven’t received the care yet. Most prior authorization denials fall here.
• Post-service appeal — 60 calendar days. The care happened, the claim was submitted, the insurer denied it.
• Expedited appeal — 72 hours. Standard timing would seriously jeopardize your life, health, or ability to regain maximum function. This applies to ongoing inpatient care, urgent medication continuation, and surgeries scheduled within roughly two weeks.

Federal rules require insurers to decide internal appeals within 30 days for pre-service claims, 60 days for post-service claims, and 72 hours for expedited appeals.

What actually happens, week by week

Here is what a standard post-service appeal looks like on a real calendar — assuming you file complete and the insurer takes its full 60 days.

1. Day 0 — you file. Submit via the method on the denial letter (fax, member portal, certified mail). Keep a complete copy of every page sent.
2. Days 1–7 — acknowledgment. Most insurers send a written acknowledgment within a week. If you haven’t heard anything by day 10, call to confirm receipt and write down the reference number, the rep’s name, and the time.
3. Days 7–30 — first-level review. A claims rep cross-checks your appeal against the original denial. If the issue is administrative (coding, missing info, duplicate), it can resolve here. Medical-necessity and experimental denials almost always escalate.
4. Days 30–55 — clinical review. A nurse reviewer and/or medical director reads the file. For specialty drugs or complex procedures, the insurer may engage a peer-review physician in the relevant specialty.
5. Day 60 — final written decision. By regulation, you should have a written answer in hand by the 60-day mark. It will either uphold the denial, partially overturn, or fully approve. An upheld denial unlocks your right to external review.

Expedited appeals — the 72-hour track

If the standard timeline could meaningfully harm your health, you can request an expedited internal appeal. Federal rules require a decision within 72 hours of receipt. Importantly, you can request expedited internal appeal and expedited external review at the same time — you don’t have to wait for internal to finish. That parallel-track option matters when care can’t wait. For details on when expedited treatment is allowed, see our guide to expedited insurance appeals.

External review — what the second clock looks like

If the internal appeal is upheld, you can usually request external review by an independent organization. Federal external review must be completed within 60 days of a complete request; expedited external review must be decided within 72 hours. State-run external review programs sometimes work slightly faster — New York and California, for example, have well-documented timelines through the state Department of Insurance.

For the bigger-picture comparison, our pillar on internal appeal vs. external review walks through which path to use and when. If you live in California, our California external review page covers the state-specific Independent Medical Review program.

Why appeals slip past the deadline (and what to do)

Three things commonly stretch the standard timeline:

• Missing information requests. If the insurer writes back asking for additional records, the review clock can pause for up to 45 days while you respond. Send the requested documents quickly and keep proof of delivery.
• Peer review delays. Medical-necessity appeals for specialty drugs and complex surgery often need a peer-review physician. Scheduling that conversation between your provider and the insurer’s reviewer is a frequent bottleneck.
• Wrong submission channel. Sending an appeal to a general claims address rather than the appeals unit listed on your denial letter can cost weeks.

When the timeline is the appeal strategy

If you have a scheduled surgery, an inpatient stay, or a prescription you can’t safely interrupt, the deadlines above aren’t background trivia — they’re the core of your appeal strategy. Filing with a clear, documented request for expedited treatment is what compresses the 60-day window into 72 hours. For the full playbook on how to file at all, start with how to appeal a denied health insurance claim.

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