Why immunotherapy insurance claims get rejected — and how to pre-empt it, or appeal

Because of a short, repeating list of grounds — not because immunotherapy is uninsurable. The commonest are an indication the drug is not approved for, a day care versus in-patient dispute, an unexpired waiting period, a sub-limit on modern treatment methods, and missing documents. Paperwork causes more rejections than policy wording does.

That is genuinely good news, because paperwork is the part you can control. This page sets out the grounds insurers actually use, a prevention checklist to run before your first cycle, and the appeal route — including the wording of a representation letter and the free escalation that exists if the insurer does not move.

One honest caveat before you read on. Nothing on this page is a guarantee of coverage. Your insurer decides your claim against your own policy wording, and CION neither processes nor adjudicates it. What follows improves your odds and your documentation; it does not commit any insurer to pay.

Government schemes work differently again — package-based, with their own ceilings. Those are covered on our pages for Aarogyasri and Ayushman Bharat (PM-JAY).

1. 1

   Get the exact clause in writing

   Ask for the rejection letter to name the clause it relies on, not just a phrase like "not payable". You cannot answer a reason you have not been given. A verbal refusal at the cashless desk is not a rejection — you can still file for reimbursement afterwards.

2. 2

   Answer the clause with documents, not argument

   Match each stated reason to a document. Off-label becomes the approved indication and the guideline reference. Day care becomes the admission note and discharge summary. Non-disclosure becomes dated records showing when the illness was first diagnosed.

3. 3

   Write to the grievance redressal officer

   Every insurer must have one, and every insurer must acknowledge your complaint. Send a dated representation by email with all annexures, and keep the acknowledgement. Under IRDAI's health insurance master circular, a claim is not meant to be repudiated without review by the insurer's own claims review committee — say so in your letter.

4. 4

   Escalate to the Insurance Ombudsman

   If the insurer rejects your representation, or does not reply within thirty days, you can go to the Ombudsman — free, no lawyer, normally within one year of that point. The office covering Telangana and Andhra Pradesh sits in Hyderabad. Awards can run up to ₹50 lakh and bind the insurer.

5. 5

   Keep treatment decisions separate from the dispute

   An appeal can take weeks. Tell your oncologist what is happening — the clinical plan, including whether to continue, pause or change approach, has to be made on medical grounds and your real financial position, not on the hope that a claim will turn around.

• Ask for pre-authorisation in writing — naming the molecule, the indication and the planned number of cycles, not just "immunotherapy".
• Find the modern treatment methods clause — check whether a sub-limit applies to it, and what that limit is in your policy.
• Get a treatment plan letter — diagnosis, stage, biomarker result, drug, dose, cycles, and the guideline that supports the choice.
• Confirm the visit is registered as day care — with an admission note and a discharge summary, not an out-patient bill.
• Ask who bills the drug — a vial bought outside and carried in often falls outside the hospitalisation claim.
• Check your waiting periods — initial, specified-disease and pre-existing clauses all have dates you can read off the policy.
• Keep one file, from day one — biopsy report, biomarker report, prescriptions, admission notes, discharge summaries, invoices, and every email.
• Intimate the claim on time — most policies set a short window after admission or discharge; late intimation is an avoidable ground.

None of this guarantees approval. Your insurer decides the claim against your own policy wording.

Keep it short, dated, factual and annexed. Six paragraphs are enough. Replace everything in square brackets with your own details, attach the documents you name, and send it by email so you have a timestamp.

This is a general drafting aid, not legal advice, and it does not commit any insurer to settle. If your rejection turns on non-disclosure or on a policy exclusion you did not know about, consider taking independent advice before you reply.

No. The claim sits between you, the hospital billing desk and your insurer, and the insurer alone decides it. What our team can do is supply the clinical side of the file properly — a written treatment plan, the diagnosis and biomarker documentation, and a clear record of the drug, dose and schedule.

Immunotherapy at CION centres is given as day care, so the visit is documented as a day care episode rather than an out-patient consultation. Response-assessment PET-CT is coordinated at partner imaging centres rather than performed in-house, which is worth knowing when you assemble scan invoices for a claim.

If the cost gap is the real obstacle rather than the paperwork, say so at the consultation. Discussing what treatment actually costs, and what a family can sustain, is part of the plan — not a separate conversation to be had later.

• Is Immunotherapy Covered Under Aarogyasri? — how the Telangana and AP scheme handles it, and why a package rate behaves nothing like an indemnity policy.
• Ayushman Bharat (PM-JAY) and Immunotherapy — the national scheme, its package logic, and what to ask the empanelled hospital's coordinator.
• Patient Assistance Programmes: How They Work and How to Apply — manufacturer and foundation support, and the paperwork these programmes ask for.
• Immunotherapy at CION Cancer Clinics — who the treatment is and is not suitable for, and how the day care pathway runs.

All regulatory positions, timelines and cost references on this page are indicative, as of August 2026, and are described in general terms only. Insurance rules, scheme ceilings and policy wordings change. Confirm the current position with your insurer, your scheme desk or the hospital billing team before acting. This page does not guarantee coverage, settlement or the outcome of any appeal.

Thousands of families have worked through the cost question with us

Whether the claim is settled, capped or contested, the treatment decision still has to be made honestly. That conversation is part of the consultation.