What Happens If Your Insurance Refuses Treatment Coverage

A Refusal Before Treatment Is a Different Animal

Most guidance on fighting an insurer describes what happens after care has been given and a bill has been denied. This is the other situation: the treatment has not happened yet, your doctor has requested authorization, and the plan has said no.

The distinction matters because pre-service and post-service denials run on entirely different clocks, and the pre-service ones are much faster. Knowing which set applies is the difference between an answer in three days and an answer in three months.

One clarification first. A refusal to authorize is not a refusal to allow. The plan is saying it will not pay, not that you cannot have the treatment. That sounds like a technicality and it is not: it means the clinical decision stays with your doctor, and the fight is about money, which is a fight with published rules and deadlines.

The Deadlines Your Plan Is Bound By

For most employer plans and marketplace coverage, federal rules set the timetable. These are the outer limits, not targets.

Two things follow that people rarely use. If delay would seriously jeopardize your health or your ability to regain function, the request is urgent, and saying so in writing changes the clock from weeks to days. Your doctor's statement that the situation is urgent is generally enough to establish it.

And on an urgent case you do not have to finish the internal appeal before starting the external one. An expedited external review can be requested at the same time, which removes the insurer's ability to run out the clock on you.

Ask for the Criteria, Not the Reason

The denial letter gives a conclusion. What you need is the standard it was measured against.

Request, in writing: the specific clinical review criteria or medical policy applied, the plan document definition of medical necessity, the credentials and specialty of the reviewer who made the decision, and the complete file relating to the request. For plans covered by federal rules, you are entitled to this free of charge.

This matters because most pre-service denials are not clinical disagreements at all. They are mismatches: a requirement in the criteria that has been met but not documented, a diagnosis code that does not map to the policy, a step the plan requires first that was already tried years ago at a different practice. Once you can see the criteria, the appeal writes itself against them line by line.

The reviewer's specialty is worth asking about specifically. A denial of a complex procedure decided by someone with no training in that field is a point worth making, and many state laws and plan procedures require a same-or-similar-specialty reviewer at the appeal stage.

Step Therapy and How to Get Around It

Step therapy, sometimes called fail-first, requires you to try a cheaper option before the plan pays for the one your doctor requested. It is not inherently unreasonable and it is applied mechanically.

Most states have enacted step therapy exception laws, which require plans to grant an override in defined circumstances and to respond within a set time. The usual grounds are that the required drug is contraindicated, that it is expected to be ineffective given your clinical profile, that you have already tried and failed it, or that you are stable on your current therapy.

Two practical points. Documentation of a prior failure from another practice or another state counts, but only if it is in front of them — obtain those records and attach them rather than describing them. And these state laws generally do not reach self-funded employer plans, which are governed by federal law instead. Ask your HR department whether the plan is self-funded or fully insured, because the answer determines which rulebook applies to you.

The Peer-to-Peer Call

Ask your physician's office to request a peer-to-peer review: a direct conversation between your doctor and the plan's medical reviewer.

It is the fastest route available when it works, because it removes the paperwork intermediary. It works best when the treating physician has the chart open and can speak to the specific criterion being applied, which is another reason to obtain the criteria first and give them to the practice.

It is also often available only in a narrow window after the initial denial, so it should be requested immediately rather than after a written appeal has been filed. Ask the practice to document the call and its outcome either way.

Writing the Appeal

1. Address the stated reason, and nothing else. If the denial says the treatment is investigational, the appeal is about whether it is investigational. Arguments about fairness or cost do not engage with the decision.
2. Attach a letter of medical necessity from the treating physician linking your specific findings to the requested treatment, referencing the plan's own criteria, and stating what has already been tried and what happened.
3. Include the clinical evidence your doctor relies on — specialty society guidelines carry particular weight because they are the standard the plan's own criteria are usually drawn from.
4. State the urgency explicitly where it applies, and ask for expedited handling in the first line rather than at the end.
5. Keep it in writing and keep proof of delivery. Phone conversations are summarized into the file by the other party.

External Review Is the Real Leverage

If the internal appeal fails, most plans are required to offer an external review by an independent organization with no financial relationship to the insurer. The decision binds the plan.

This is the step people skip, and it is the one that changes the balance of power, because the question stops being whether the insurer wants to pay and becomes whether an independent reviewer agrees with its clinical reasoning. It costs the patient little or nothing.

Note the boundaries: external review generally covers medical judgment questions such as medical necessity, appropriateness and investigational status. Pure contract questions — whether a benefit exists in the plan at all — may fall outside it. Check whether your state or the federal process administers it, and note the filing deadline, which is measured in months from the final internal denial.

Two Things Worth Doing in Parallel

Complain to the regulator. For a fully insured plan, your state insurance department will require the insurer to justify itself in writing. It is free and it is effective on procedural failures — missed deadlines, missing disclosures, reviewers without relevant credentials. For a self-funded employer plan, the federal labor department is the equivalent channel.

Ask what happens if you proceed anyway. Sometimes treatment cannot wait for the process. Ask the provider what the self-pay price is, ask whether the claim can still be submitted afterwards, and get any financial assistance policy in writing before proceeding. If a large bill has already landed, the approach is in handling a very large medical bill.

Why So Few People Do Any of This

Research by KFF into marketplace plans has found that a substantial share of in-network claims are denied, and that the proportion of consumers who appeal is very small — a fraction of one percent. The gap between those two numbers is the entire subject of this article.

Two caveats worth stating rather than glossing over. That research covers marketplace plans, so it is not a statement about all insurance, and denial rates vary enormously between insurers and between plan types. And overturn rates on appeal are reported inconsistently, which is why no percentage is given here — the honest position is that appealing is free or cheap, that the deadlines bind the insurer rather than you, and that almost nobody does it.

If the Answer Stays No

Three routes remain, and they are worth knowing before you need them.

A different pathway to the same outcome. Where a specific drug or procedure is refused, ask the treating clinician whether an alternative that is covered would achieve an acceptable result. That is not capitulation; it is what the exception process is measured against, and a documented trial strengthens any later appeal.

Manufacturer and foundation assistance, which exists for many high-cost therapies and operates independently of the insurer. Ask the prescribing practice, since they usually know which programs apply.

A change of plan at the next opportunity. Formularies, prior authorization lists and networks differ substantially between plans, and a treatment refused under one may be routine under another. That is a decision for open enrollment rather than mid-year, and the comparison is in reviewing your plan at open enrollment and HMO versus PPO.

Questions People Ask

Can I be denied treatment because of this?

No. A coverage refusal is about payment. Your physician's clinical recommendation stands, and treatment decisions remain between you and them.

What if the plan misses its own deadline?

Where a plan fails to follow the required procedures, you may be able to proceed straight to external review without completing the internal appeal. Note the dates carefully, because this is a real remedy that depends entirely on documentation.

My employer's plan says state law does not apply. Is that right?

Possibly. Self-funded employer plans are governed by federal law and are generally outside state insurance mandates, including many state step therapy and external review provisions. The federal framework applies instead.

Does any of this apply to an emergency?

Emergency care is treated differently and prior authorization cannot be required for it. The separate rules on what you owe are in out-of-network charges in emergencies.

What if the denial is about a prescription rather than a procedure?

The same appeal structure applies, with formulary exception and step therapy override processes layered on top. Cost strategies while the process runs are in saving on prescription costs.

How is this different from appealing a bill I already received?

Different clocks, and a different posture — a post-service appeal is about money already owed. That process is covered in appealing a claim denial, and the documents you need to read first are explained in what an EOB is and how your deductible works.

The Short Version

A pre-service denial runs on fast clocks: 72 hours for an urgent request, 15 days for a routine one, and the same again at internal appeal. Say the word urgent in writing where it applies, supported by your doctor, and the timetable collapses from weeks to days.

Ask for the clinical review criteria and the reviewer's specialty, not just the reason. Most pre-service denials are documentation mismatches rather than genuine clinical disputes, and you cannot fix a mismatch you cannot see.

Request a peer-to-peer call immediately, because the window for it is short. Use your state's step therapy exception process if that is the obstacle, after checking whether your plan is self-funded.

And do not stop at the internal appeal. External review by an independent organization is binding on the plan, costs you little, and is the step almost nobody takes.

Sources and Editorial Note

Decision and appeal timeframes for pre-service, post-service, concurrent and urgent care claims, the right to plan documents and clinical criteria, and the external review process derive from federal claims procedure rules administered by the US Department of Labor Employee Benefits Security Administration and, for marketplace coverage, from rules described at HealthCare.gov. Analysis of in-network denial rates and consumer appeal rates in marketplace plans is published by KFF; those findings describe marketplace coverage specifically and vary widely by insurer.

Figures circulating for appeal success rates, external review overturn rates and peer-to-peer reversal rates are not consistently sourced and have been omitted rather than repeated.

Step therapy exception laws, external review administration, specialty-match requirements for reviewers and regulator complaint procedures vary by state, and self-funded employer plans fall outside most state insurance mandates. Complaints about a fully insured plan go to your state insurance department.

This article is general information about insurance and appeals. It is not medical advice and nothing here should delay care — treatment decisions belong with your clinician, and a coverage refusal does not change their recommendation.