A history of cancer and insurance cover

Written by Stuart Hendy. Reviewed by Ilana Eldad.

Published 2026-09-15. Last reviewed 2026-09-15. Next review due 2027-03-15.

How underwriting usually handles it

• Health insurers normally exclude the cancer and anything related to it, often permanently on full underwriting.
• Some insurers will consider cover after a long clear period, with evidence from the treating team.
• Life and critical illness applications are often postponed until a set period after treatment ends.
• A moratorium policy is unlikely to bring a past cancer back into cover quickly, if at all.

Which underwriting basis you choose changes the answer more than the condition itself does. Our guide to moratorium versus full medical underwriting explains the two routes; in short, a moratorium asks nothing up front and decides later, while full underwriting decides now and puts the answer in writing.

What is commonly excluded or limited

• Recurrence, secondary cancers and follow-up monitoring are commonly excluded together.
• Cover for a new, unrelated cancer may still be available — ask specifically.
• Cancer cover varies more between health insurance products than any other benefit.

Nothing here is universal. Two insurers can take different views of the same history, and the same insurer can take different views on two products. The policy wording is the only thing that decides it.

What happens when you claim

• Claims are assessed against the cancer terms in your specific policy, which differ sharply between products.
• Insurers will usually request the oncology record.
• NHS cancer treatment follows the cancer waiting times standards regardless of insurance.

Insurers must handle claims promptly and fairly and must not turn a claim down unreasonably; the rules are in the FCA’s insurance conduct sourcebook. ^[1] If you think a decision is wrong, you can complain and then take it to the Financial Ombudsman Service free of charge. ^[2] Our complaints page sets out both routes.

The NHS route

Whatever an insurer decides, NHS care is unaffected: buying or being refused insurance changes nothing about your entitlement. Treatment on the NHS follows clinical guidance rather than policy wording. ^{[5] [4]} For information and support about the condition itself, Macmillan Cancer Support is a better place than an insurance site.

Questions to ask before you buy

1. Is a new and unrelated cancer covered, or is all cancer excluded?
2. On a moratorium policy, exactly how far back does the look-back go, and how long must I be clear?
3. If I choose full underwriting instead, will you put the exclusion wording in writing before I pay?
4. Would the exclusion be reviewed later, and on what evidence?
5. Does the exclusion extend to related conditions and complications, or only to this one?

An adviser can answer those questions for your own history; we cannot, and we do not try to. Anyone advising you on insurance must be authorised, and you can check them on the Financial Services Register. ^[3] Free impartial guidance is also available from MoneyHelper. ^[6]