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.
Choose how you want to read this
The whole article, with every detail and caution.
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 an external review can decide in your favor. 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. For an urgent case, your insurer must speed up an internal appeal. Expedited external reviews are decided as soon as possible, and no later than 72 hours, depending on medical urgency. If your case is urgent, tell your doctor's office and your insurer right away.
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. HealthCare.gov lists a help line at 1-800-318-2596.
A note about this page
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
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.
Tap a question to save it to your list (kept on this device).
Your next step
One-pagers for tracking bills, calls, and questions.
Talk with a trained specialist or navigator
Cancer Explained provides educational guidance, but does not replace trained specialists, social workers, or your medical team.
Talk to a trained cancer information specialist
Free, confidential assistance from NCI Cancer Information Service via phone, chat, or email.
Contact your oncology team
Locate after-hours contact numbers, portal messages, or urgent triage phone lines.
Find a patient navigator
Get one-on-one help with appointments, logistics, translation, and care coordination.
Find a genetic counselor
Discuss inherited mutation risk, family history, and genetic testing options.
Find an oncology social worker
Access emotional counseling, family support groups, and mental health resources.
Find a financial navigator
Locate copay assistance foundations, grant programs, and lodging/travel support.
Find a clinical-trial specialist
Search matching studies and speak with NCI trial information specialists.
Get urgent help
Fever of 100.4°F (38°C) or higher during chemo, severe pain, or trouble breathing: call your cancer care team right away, day or night. Call 911 for an emergency.
Know someone who needs this?
Plenty of people are looking for something like this and do not know where to start. If this would help a friend or someone you love, send it on — we have written an opening line so you do not have to stare at an empty message. You can change every word of it.
Your message is written and sent in your own email or messaging app — we never see who you send it to, and nothing is added to any list.
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
Review details and limits
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, and this 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 then compared with the sources listed on it, looking for statements those sources do not back up. That check is not a sentence-by-sentence record and can miss errors. It is not a medical review, and it does not confirm the page is complete or right for your situation.
General education — varies by person. Answers genuinely differ between people. This page explains what commonly varies and points you to your care team 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.
Words to know
Tap any term to see what it means.
Knowledge check
0 of 3 answered
This self-assessment checks understanding of educational content only. It is not medical advice.
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, and this 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 then compared with the sources listed on it, looking for statements those sources do not back up. That check is not a sentence-by-sentence record and can miss errors. 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.
Read more about our editorial process, our use of AI, and our corrections policy.
Spotted a problem? Report an error — a factual mistake, broken or outdated source, confusing wording, or anything that seems unsafe. Please do not include names, medical record numbers, dates of birth, addresses, or other identifying medical information in your report.
After using this page, do you understand what to do next?
Anonymous — we only record the answer, never who gave it.