Cancer Treatment and Insurance: Coverage, Costs and Appeals

After a cancer diagnosis, insurance questions arrive at the worst possible time: what the plan pays, what it does not, and what to do when a treatment or scan is turned down. The answers differ a lot between the US, the UK and Canada. This guide covers what insurance usually pays for, what cancer care costs patients, how to appeal a denial quickly, how UK private cover works for cancer, and where a written second opinion fits in.

What does health insurance cover for cancer treatment in the US?

Comprehensive US health plans generally cover cancer treatment that is medically necessary, including surgery, chemotherapy, radiotherapy and medicines, but only on the plan's terms. Those terms are the deductible, coinsurance, the provider network, prior authorisation for many treatments and scans, and the drug list (formulary). A treatment can be covered in principle and still be denied for one patient because the paperwork did not show why it was needed, or because the plan wants a cheaper option tried first.

Plans also cap what you pay each year. For an HSA-eligible high-deductible plan, the 2026 out-of-pocket maximum is USD 8,500 for one person and USD 17,000 for a family (IRS). Separate "cancer insurance" policies are sold as supplements that pay set cash amounts; they do not replace a health plan, so read what triggers a payment before you rely on one.

How much does cancer treatment cost in the US compared with Canada?

In the US, even insured patients pay thousands. Privately insured patients under 65 paid more than USD 6,000 out of pocket in the six months after a breast, colorectal or lung cancer diagnosis, and about USD 4,500 for prostate cancer, according to a study reported by the American Cancer Society (2016 data, in 2020 dollars). The total cost of care in those six months was far higher, as the table shows; most of it was paid by insurers. If bills are already building up, see financial assistance and payment plans for medical bills.

In Canada, most cancer treatment given in hospital is paid by the provincial plan. The gap is medicine taken at home: in Ontario, take-home cancer drugs "do not universally fall under the jurisdiction of the Ontario Drug Benefit program", while people in the western provinces and northern territories have their cancer drugs paid for by the province whatever the route (Canadian Cancer Society, 2022). Check what your province covers and whether a workplace plan fills the gap.

How do you appeal a denied claim or prior authorisation for cancer treatment?

Ask for an urgent (expedited) appeal, and get your oncologist to send the clinical reasons in writing. For US private plans, you have 180 days from the denial notice to file an internal appeal. For urgent care, the insurer must decide within 72 hours, and you can request an internal appeal and an external review at the same time. An expedited external review must be decided as quickly as your condition requires and within 4 business days; a standard one within 45 days. The insurer is required by law to accept the external reviewer's decision (HealthCare.gov).

Most denials turn on missing information. Someone who used to review these requests for insurers put it this way.

Few people use the process: only about 1% of denied in-network claims at HealthCare.gov insurers were appealed in 2023 (KFF). Persistence can work.

Original Medicare has 5 levels of appeal, and you file the first by the date on your Medicare Summary Notice; a decision usually comes within 60 days (Medicare.gov). For the general steps, see our guide to appealing a health insurance denial.

Does private health insurance cover cancer treatment in the UK?

Many UK private medical insurance policies include cancer treatment, but the limits differ from policy to policy, and the small print matters. Look for caps on drugs and radiotherapy, whether drugs the NHS does not fund are included, and what happens when a limit is reached.

Private cover does not usually pay for a condition you already have. Under moratorium underwriting, a condition you had in the 5 years before the policy starts is excluded until you have gone 2 continuous years without symptoms, treatment or advice for it (Aviva). A cancer diagnosed before you join is therefore usually not covered for some time, if at all.

You can also pay privately without insurance. In England, Department of Health guidance (2009) says the NHS should not withdraw NHS care because you buy additional private care, and should keep providing free the care you would otherwise have received, as long as the private care is delivered separately. Ask your NHS team how this would work in your case before you pay.

Can you get health insurance after a cancer diagnosis?

In the US, yes. HealthCare.gov states that "no insurance plan can reject you, charge you more, or refuse to pay for essential health benefits for any condition you had before your coverage started", with an exception for grandfathered individual plans bought before March 2010. You can enrol during open enrolment, or during a special enrolment period after events such as losing other coverage. Short-term and limited-benefit plans may not follow these rules, so check before you buy one.

In the UK, new private cover will normally exclude the cancer, as above. In Australia, a private hospital insurer can impose a 12-month waiting period for a pre-existing condition (Australian Government). In all three countries, public care remains available to eligible residents.

Where does a second opinion fit when coverage is in doubt?

A second opinion helps you and your doctor look at the diagnosis and the options again, which can be useful when a plan has been refused or you are weighing a costly choice. It is not usually paid for by insurance. Cleveland Clinic lists its virtual second opinion at USD 1,690, and USD 4,500 for international patients, and says insurance does not typically cover it; Dana-Farber charges USD 3,000 for an online second opinion (2026).

We arrange a written second opinion from the multidisciplinary team of a partner hospital in China. We pass your reports to the hospital, its team reviews them with your questions, and it issues a written opinion signed by its licensed doctors, with an English translation and the Chinese original. It can cover the team's view of the diagnosis and staging, the treatment options they see and any further tests they think are needed. We do not give medical advice, and the opinion does not replace your own doctor; take it to them and discuss it. Before anything is sent, we tell you the hospital, the fee and the expected time, and we ask for your separate consent to send your records abroad. Assume you will pay the fee yourself.

Insurance rules change and differ by plan. Check the details with your insurer, and if a treatment is urgent, raise the appeal at the same time as you look at other options.