How to Claim on Aviva Health Insurance (UK, 2026): Step-by-Step, Codes & Pitfalls
Everything you need to make a successful Aviva health insurance claim — from getting pre-authorisation to understanding your outpatient limit, the Six-Week Option, and what to do if Aviva rejects your claim. Independent guide, not affiliated with Aviva.
Most important rule: Never book treatment before getting an authorisation code from Aviva. Claims without pre-authorisation are frequently rejected regardless of whether the treatment is covered under your policy.
In this guide
To claim on Aviva health insurance: (1) get a GP referral, (2) call Aviva to pre-authorise with your membership number, clinician details and treatment requested, (3) get your authorisation code, (4) book and attend treatment. Aviva pays the provider directly — you cover your excess and any shortfalls. Never book before pre-authorising. Check if your plan has the Six-Week NHS Option as this can affect whether a claim is approved.
What you need before calling Aviva
Have these to hand before you contact Aviva to pre-authorise your claim. Missing any of these will slow the process down.
Pre-authorisation checklist
Aviva app & online portal
Aviva offers an online member portal and app where you can check your cover, submit some claim requests and track authorisations. However, for complex treatments or if you're unsure, calling Aviva directly is usually faster and gives you a clear record of what was agreed. Keep note of the date, time and name of the person you spoke to.
How to claim on Aviva step by step
Check your cover first
Before doing anything else, confirm your plan type, hospital list, outpatient allowance and whether you have the Six-Week NHS Option. Log into the Aviva portal or call the member helpline. Understand your excess — this determines what you pay when you claim. See: Aviva hospital list · outpatient limits · excess explained.
Get a GP referral
Most Aviva claims start with a GP referral letter addressed to the specialist. Book a GP appointment, explain your symptoms, and ask for a referral to a private consultant. If you're using Aviva's Expert Select pathway, you may be able to bypass this step for certain conditions — call Aviva first to check. See: do you need a GP referral? · health insurance with private GP access.
Pre-authorise with Aviva — get your code
Call Aviva on the number on your membership card before booking any appointment. Have your membership number, GP referral, consultant details and hospital name ready. Aviva will check your cover and issue an authorisation code. Do not book treatment without this code. Keep a record of the code, date and who you spoke to.
Book your appointment and give the hospital your code
Contact the hospital or consultant's secretary to book. Give them your Aviva membership number and authorisation code. For in-network providers, they will bill Aviva directly. Ask the hospital to confirm billing arrangements before your appointment to avoid surprises. See: Aviva procedure codes explained.
Attend treatment and keep all paperwork
Keep copies of your GP referral, appointment letters, consultant notes and any invoices. You may need these if there is a query on your claim later. If your consultant recommends further treatment, go back to Aviva to authorise each new step before proceeding.
Pay your excess and any shortfalls
Aviva pays the hospital and consultant directly for covered treatment. You pay your excess (per claim or per year depending on your plan) and any shortfall if your consultant charges above Aviva's recognised fee schedule. If you're paying out of pocket temporarily, keep receipts and submit a claim form. See: excess explained · Aviva fee schedule guide.
The Six-Week NHS Option explained
This is the most misunderstood feature on Aviva policies. If your plan includes the Six-Week Option, it significantly affects when you can claim for private treatment.
What the Six-Week Option means in practice
If the NHS can treat you within six weeks of your GP referral, Aviva may decline to cover the private treatment — or pay a cash benefit instead (the NHS Cash Benefit, if included on your plan). If the NHS waiting time is longer than six weeks, you can proceed privately and Aviva will cover eligible costs subject to your policy terms.
✅ When private cover is triggered
- NHS waiting time exceeds 6 weeks for your condition
- Your plan does NOT have the Six-Week Option
- Emergency or urgent treatment is needed immediately
- Treatment type is excluded from NHS provision
❌ When the Six-Week Option blocks cover
- NHS can treat you within 6 weeks and your plan has this option
- You don't check NHS availability before going private
- You proceed with private treatment assuming it's covered
- You don't tell Aviva about NHS availability at pre-auth stage
How to check if your plan has this option
Look at your policy certificate or schedule of benefits. It will be listed as “Six-Week Option” or “6-Week NHS Wait”. If you can't find it, call Aviva before booking any private treatment. See: Six-Week NHS Wait Option explained in full.
Outpatient limits & what counts towards them
Your outpatient limit is one of the most important numbers on your Aviva policy. Most claims — including consultations and scans — come out of this allowance.
What typically counts towards your Aviva outpatient limit
What typically does NOT count towards your outpatient limit
Aviva offers outpatient limits of £0 (no outpatient cover), £500, £1,000 or unlimited depending on your plan. Always check yours before booking any diagnostics. See: outpatient limits explained in full · AXA outpatient limits · Vitality outpatient limits.
Common Aviva claim pitfalls
Most failed or partially paid Aviva claims come down to one of these mistakes. Avoid them and the process is usually straightforward.
No pre-authorisation
Booking treatment before getting an authorisation code is the single most common reason claims are rejected. Always call Aviva first, get the code, and keep a record of it.
Six-Week Option surprise
Proceeding with private treatment without checking whether the NHS could treat you within six weeks — then finding Aviva won't cover it. Always check this at the pre-authorisation stage.
Out-of-network consultant
Using a consultant not recognised by Aviva, or one at a hospital not on your plan's hospital list. This leads to shortfalls or uncovered bills. Always confirm the consultant is recognised before booking. See: Aviva hospital list.
Excess confusion
Not knowing whether your excess is per claim or per policy year. Some policies have a £500 excess per claim — meaning a single consultation and scan could cost you £500 before Aviva pays anything.
Chronic condition exclusion
Aviva (like all UK insurers) excludes chronic conditions — ongoing conditions that cannot be cured and require long-term management. Claiming for a chronic condition will be declined. See: pre-existing conditions guide.
Running out of outpatient allowance
Using your outpatient limit on consultations early in the year and then having no cover left for diagnostics. If you have a £500 or £1,000 limit, track claims carefully. See: outpatient limits guide.
What to do if Aviva rejects your claim
Request written reasons
Ask Aviva to confirm the rejection in writing, citing the specific policy clause they are relying on. This is essential for any appeal.
Gather supporting evidence
Collect your GP referral letter, consultant notes, appointment letters, any test results and correspondence with Aviva. Clinical evidence of medical necessity can strengthen an appeal.
Submit a formal appeal
Use Aviva's formal complaints process, submitting your evidence and the specific grounds for your appeal. Keep copies of everything you send. See: how to appeal a rejected health insurance claim.
Escalate to the Financial Ombudsman if needed
If Aviva's internal complaints process does not resolve your case, you can escalate to the Financial Ombudsman Service (FOS) — an independent body that can review insurance disputes. This is information only and not legal advice.
Prevention is easier than appeal
The vast majority of claim disputes can be avoided by pre-authorising, confirming consultant recognition, checking your hospital list and understanding your outpatient limit before treatment. If in doubt, call Aviva before booking — not after.
Thinking of switching from Aviva?
If your Aviva renewal has increased significantly, your outpatient limit feels too low, or you want wider hospital access, switching is worth considering. The key is switching on CPME (Continued Personal Medical Exclusions) terms — which means your new insurer recognises your claims history and continues cover for conditions already recognised under your Aviva policy.
Switching on CPME terms
CPME allows you to switch insurers without losing cover for conditions you've already been treated for under your current Aviva policy (subject to the new insurer's terms). This is particularly important if you've already had diagnostics or treatment. Always check CPME eligibility before switching. See: CPME health insurance explained · how to switch health insurance.
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