7 Reasons Your Health Insurance Claim Gets Rejected — And How to Prevent Them

By Nitish Bharadwaj · Published May 22, 2026 · 5 min

Health insurance claims in India are rejected for reasons that are often preventable — non-disclosure of pre-existing conditions at policy inception, treatment in non-network hospitals, procedures excluded under the policy, waiting period violations, and discrepancies in documents submitted. This guide identifies the seven most common rejection causes with insurer-specific examples, and explains the steps policyholders can take at purchase, renewal, and claim stage to minimise rejection risk.

Health insurance claim rejections happen more often than they should. Most rejections are due to reasons that could have been avoided at the time of buying the policy. Here are the most common reasons and how to protect yourself.

Top 5 Reasons Claims Are Rejected

1. Non-disclosure of pre-existing conditions at the time of buying — always disclose everything, even if you think it's minor
2. Treatment not listed as covered under the policy terms — check the exclusion list before choosing a hospital
3. Policy lapsed due to missed renewal — set auto-renewal or calendar reminders
4. Claiming within the waiting period (pre-existing: 2–4 years; specific diseases: 1–2 years)
5. Using a non-network hospital in a cashless claim — check network hospitals in your city before you need emergency care

Why Non-Disclosure Is the Most Dangerous Mistake

When you apply for health insurance, the insurer prices your premium based on your declared health status. If you omit a condition — diabetes, hypertension, a previous surgery — and later claim for something related to it, the insurer has grounds to reject the claim entirely and sometimes void the policy from inception. IRDAI's 5-year moratorium rule offers partial protection: once a policy has been in force continuously for 5 years, the insurer can no longer repudiate a claim on grounds of non-disclosure unless it involves a fraudulent misrepresentation. But that protection only applies if the policy has been continuously renewed — a lapse or switch to a different insurer resets the clock. Disclose everything at the proposal stage, even conditions that appear unrelated to why you're buying the policy. The underwriter decides relevance, not you.

Waiting Period Rejections: The Trap New Policyholders Walk Into

Every health insurance policy comes with waiting periods — blocks of time after the policy start date during which certain conditions are not covered. A typical policy has three: a 30-day initial waiting period (no claims of any kind except accidental injury); a 1–2 year specific disease waiting period for listed conditions like cataracts, hernia, and joint replacements; and a 2–4 year pre-existing disease (PED) waiting period. IRDAI capped the PED waiting period at 3 years in 2024, which is an improvement — but many older policies still show longer waiting periods in their terms. The rejection happens when someone newly insured gets treated for a condition that falls under one of these periods, and the claim paperwork shows the diagnosis or the hospital admission date falls before the waiting period has expired. The fix is simple but often ignored: read the waiting period schedule in your policy document before scheduling any non-emergency procedure.

How to Document a Claim to Reduce Rejection Risk

• For planned surgery: notify the insurer and get written pre-authorisation at least 72 hours in advance. Keep the approval email or letter.
• At admission: use a network hospital for cashless claims. Confirm the hospital is on the insurer's current list, not a cached version — networks change.
• During treatment: keep originals of all bills, prescription slips, doctor notes, and investigation reports. Photocopies are sometimes acceptable but originals are the safest bet.
• At discharge: get a detailed discharge summary from the hospital specifying the diagnosis code (ICD code), treating doctor, and dates — insurers flag claims that lack this.
• On reimbursement claims: submit within the deadline stated in your policy (usually 7–30 days post-discharge). Late submission is a legitimate rejection ground at many insurers.

What to Do If Your Claim Is Rejected

First, get the rejection letter with the specific reason in writing. Then escalate within the insurance company — request a review by the claims manager or compliance officer. If unresolved in 30 days, file a complaint with IRDAI through the Bima Bharosa portal or approach the Insurance Ombudsman — it's free and binding on the insurer. Our step-by-step guide to filing an Insurance Ombudsman complaint covers the exact escalation sequence, the one-year filing window, and the ₹50 lakh limit on what the ombudsman can award. If this experience has you reconsidering your insurer, see our best health insurance plans with the highest claim settlement ratios. One key development that reduces a common rejection point: IRDAI's Cashless Everywhere initiative now entitles you to cashless treatment at any NABH-accredited hospital, not just your insurer's listed network.