Why health insurance claims get rejected — and what to do

The moment you discover how your health policy actually works is usually the worst possible moment — at a discharge counter, with a bill, being told the claim has been rejected or reduced.

Almost none of these rejections are arguments about whether you were ill. They are about paperwork and policy terms, and most of them are decided long before you are admitted.

Not declaring a pre-existing condition

This is the largest single cause, and it is rarely dishonesty. It is someone ticking "no" on a proposal form years ago because they felt fine, or because the diabetes was "controlled", or because nobody explained that the question meant ever diagnosed, not currently troubling you.

The insurer finds it later — in your discharge summary, where a doctor has written "known hypertensive, 8 years". That single phrase, written by a doctor recording your history accurately, is what most non-disclosure rejections are built on.

If you are buying a policy: declare everything, including conditions that feel trivial and conditions that are well controlled. A declared condition may mean a higher premium or a waiting period. An undeclared one can mean no cover at all, years later, when you need it.

If you already have a policy with something undeclared, tell your insurer now rather than at claim time. Correcting it while healthy is a conversation; correcting it at a claim is a rejection.

Waiting periods

Almost every policy has them, and they are the second big cause.

Pre-existing conditions carry a waiting period — a defined number of years from when the policy started before those conditions are covered. Regulation has been pushing this down; older policies may carry longer periods than newly sold ones. Specific illnesses and treatments often have their own separate waits, and maternity typically has a long one.

There is also usually a short initial period at the very start of a policy during which only accidents are covered.

The important consequence: the clock runs from when you bought the policy, and it restarts if you let the policy lapse. A missed renewal can reset years of accumulated waiting. If money is tight, renewing a smaller policy beats letting one lapse.

The room you chose

This is the one that catches people who did everything else right, and it is worth understanding properly because it is invisible until the bill arrives.

Many policies cap room rent — a fixed amount, or a percentage of the sum insured per day. If you take a room above that cap, some policies apply a proportionate deduction: not just the room difference, but the same proportion cut from associated charges across the whole bill, because a more expensive room usually comes with higher linked charges.

So the extra ₹2,000 a day you thought you were paying for a nicer room can quietly reduce the surgeon's fee, the nursing charges and the investigations by the same proportion.

Ask two questions at admission: what is my room rent limit, and does this policy apply proportionate deduction? The hospital's insurance desk knows the answer, and it takes a minute.

Everything else that comes up

Sub-limits on specific procedures — cataract, knee replacement, and similar — capped regardless of your total cover.

Non-medical consumables. Gloves, syringes, administrative charges. Many policies exclude these, and they can be a surprising share of a bill.

Day-care and outpatient. Standard policies cover hospitalisation. Treatment not requiring admission, or an admission shorter than the policy's minimum hours, may fall outside — though defined day-care procedures are usually listed and covered.

Illegible or thin documentation. A handwritten discharge summary that cannot be read, or one that does not state the diagnosis and the treatment clearly, causes rejections that have nothing to do with your entitlement. You are allowed to ask for a legible, complete discharge summary before you leave.

Cashless approval is not final approval

This surprises people badly. A cashless pre-authorisation is provisional — granted on initial information, before the full bill exists.

At final settlement the insurer sees everything, and can still reduce or reject based on excluded items, sub-limits, or something in the notes that was not visible at pre-auth. Being told "approved" at admission is not the same as being told "paid".

The protection most people do not know they have

After a long enough unbroken run of cover — the regulator has set this at five years of continuous coverage — a moratorium applies: your insurer can no longer reject a claim on grounds of non-disclosure or misrepresentation, except where established fraud is proven.

Two things follow. Continuous cover is worth protecting, because those years buy you something concrete. And if your policy is past that mark and a claim is rejected on non-disclosure, that is worth challenging rather than accepting.

If a claim is rejected

Get the reason in writing. Insurers must state grounds. A verbal explanation from a call centre is not a reason you can act on.

Read it against your policy wording. Not the brochure — the actual policy document, which defines every term being used against you.

Complain to the insurer's grievance officer first, in writing, and keep the acknowledgement.

Escalate to the regulator's grievance system, and then to the Insurance Ombudsman, which is free, does not need a lawyer, and handles exactly these disputes.

Keep everything: proposal form, policy document, all bills, prescriptions, the discharge summary, and every piece of correspondence. Claims are won on documents, and the most common reason a genuinely valid claim fails at appeal is that nobody kept the paperwork.