The short answer
If a health plan denies coverage for a cancer treatment or claim, you usually have the right to appeal. There are internal appeals (asking the plan to reconsider) and external reviews (an independent decision). A social worker or navigator can help.
A denial is not always the final word — you usually have the right to appeal.
An internal appeal asks your health plan to reconsider its decision.
An external review lets an independent third party decide.
Read your denial letter — it explains the reason and how to appeal.
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The full explanation.
The simple version
Getting a denial from your insurance can feel like a closed door. Often it isn't the end. For many plans, you have the right to appeal, and denials are sometimes overturned. It's worth trying, and help is available.
Two kinds of appeals
For many health plans, you have two options:
- Internal appeal. You ask your health plan to review and reconsider its decision.
- External review. If the internal appeal is denied, you ask an independent organization to decide.
Start with the denial letter
Your denial letter explains why the claim was denied and how to appeal. It also gives the deadlines. Read it carefully. Keep copies of everything. Ask your doctor's office for medical information that supports your case.
Deadlines matter. For an external review, HealthCare.gov says you generally must file your written request within four months of the date you get the final denial notice. If waiting would put your health at serious risk, you can ask for an expedited external review. Those are decided as soon as possible, and no later than 72 hours in urgent cases. Tell your doctor's office if your case is urgent, because they can say so in writing.
A denial is often not the final word — you usually have the right to appeal.
Get help
You don't have to do this alone. A hospital social worker, financial counselor, or patient navigator can help you understand the denial and prepare an appeal. Your doctor's office can supply supporting documents.
A note before we begin
This information is educational. It is not a substitute for medical advice. For your own care, talk with your doctor, nurse, pharmacist, registered dietitian, or care team.
Sources
Words to know
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Common questions
Can I appeal an insurance denial?
Usually, yes. If a health plan denies coverage for a treatment or a claim, you generally have the right to ask them to reconsider (an internal appeal) and, if that's denied, to request an independent external review. Your denial letter explains the reasons and the steps.
What is the difference between internal and external appeals?
An internal appeal is a request for your health plan to review its own decision. An external review is a decision by an independent organization outside your plan. Both are protected rights for many plans.
What should I do first?
Read your denial letter carefully — it explains why the claim was denied and how to appeal, including deadlines. Keep copies of everything, and ask your doctor's office to provide supporting information.
Who can help me?
A hospital social worker, financial counselor, or patient navigator can help you understand the denial and prepare an appeal. Your doctor's office can help with medical documentation.
Questions to ask your doctor
Being prepared helps you get the most out of your appointments. Save or print these questions.
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Where to get help with this, by name
A hospital social worker or financial navigator is the best first call if you have one. If you do not, these organisations help at no cost to you.
- Patient Advocate Foundation — (800) 532-5274. Case managers take on insurance appeals, denials and medical debt with you. Free.
- TotalAssist (Patient Advocate Foundation's copay programme, merged with the PAN Foundation in 2026) — 866-512-3861. Help with medication copays, coinsurance and deductibles, insurance premiums, and office-visit and administration charges on the day of treatment, across nearly 150 conditions.
- CancerCare — 800-813-HOPE (4673). Oncology social workers, free counselling and support groups. Limited financial help with transport, home care, child care and lodging for people in active treatment who meet their income guidelines — funding is first-come, first-served, so call to ask what is open.
- Triage Cancer — 424-258-4628. Free legal and financial navigation: insurance, employment rights, disability.
- Blood Cancer United (formerly the Leukemia & Lymphoma Society) — (800) 955-4572. Information Specialists answer questions on treatment, insurance and financial problems.
- HealthCare.gov — 1-800-318-2596. For questions about the external review process — the independent review your insurer is required by law to accept.
Your state Department of Insurance regulates insurers and takes consumer complaints. On Medicare, your State Health Insurance Assistance Program (SHIP) gives free one-to-one counselling. If a specific drug is the problem, ask the manufacturer about its patient assistance programme.
Phone numbers checked 31 July 2026. Programmes and eligibility change — if a number has moved, please tell us.
Plain-language explanation of the published sources cited on this page. AI-assisted, source-checked, not clinician-reviewed.
Last updated: 2026-08-11Next planned review: 2027-01-07
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How this page was created
Cancer Explained does not originate medical claims. Every page restates guidance already published by the National Cancer Institute, the CDC, the USPSTF and the FDA, in plain language, with the source cited so you can check the original yourself. AI does the translating and organizing; automated checks test claims, citations, clarity and safety before anything publishes. We do not employ clinicians and do not intend to — our work is translation and navigation, not clinical judgment. Nothing here is personal medical advice, and no page can account for your particular situation.
Editorial status: Source checked — This page was written with AI assistance and checked line by line against the sources listed on it. That confirms the sources support what the page says. It is not a medical review, and it does not confirm the page is complete or right for your situation.
Human medical review: not completed. Pages here are not signed off by a clinician before they publish. That is not an oversight we are quietly working around: we restate published guidance and cite it, so the authority belongs to the source rather than to us, and every page names where its claims come from — you can verify us instead of trusting us. Where a volunteer clinician has reviewed a page, their name and credentials appear on it; where no name appears, no clinician has checked it. We are glad to have reviewers and are recruiting them, and we do not hold pages back waiting for one. Use this site to understand your situation and to ask better questions of the people treating you.
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