Health Insurance Reimbursement Claim Rejected in India? How to Fight Back

Reimbursement claims — where you pay for hospitalisation out of pocket and then claim back from your insurer — are rejected at a higher rate than cashless claims. This is partly because the insurer has more time to scrutinise the claim after the fact, and partly because policyholders are less aware of the procedural obligations the insurer must follow before they can reject.

Here is what the IRDAI regulations actually require, and the most common grounds on which reimbursement rejections can be challenged.

The 30-day settlement rule

Under IRDAI Health Insurance Regulations 2016, the insurer is required to settle a reimbursement claim within 30 days of receiving the last required document. This is a hard deadline. If the insurer has had your complete documentation for more than 30 days and has not settled or formally rejected the claim with written reasons, they are in violation of IRDAI regulations.

Keep a record of every document you submit and the date you submitted it. If you submitted documents by email, the email timestamp is your evidence. If by post or courier, retain the acknowledgement receipt.

The document deficiency notice requirement

This is one of the most important — and most frequently violated — procedural rules in Indian health insurance. Under IRDAI regulations, if the insurer believes the claim submission is incomplete, they must issue a written deficiency notice specifying exactly which documents are missing and giving the policyholder at least 15 days to submit them.

What insurers are not permitted to do:

• Wait until after 30 days and then claim the submission was always incomplete
• Issue a vague deficiency notice saying “additional documents required” without specifying which ones
• Reject the claim without first issuing a deficiency notice and giving time to respond

If your claim was rejected for “insufficient documentation” without a prior written deficiency notice listing specific missing items, the rejection is procedurally invalid. Raise this in your appeal.

“Not medically necessary” rejections

A common rejection ground is that the treatment was not “medically necessary” — meaning the insurer's medical team does not agree that the hospitalisation or procedure was required. This ground is routinely abused.

To sustain a medical necessity rejection, the insurer must:

• Produce a credible medical opinion — ideally from an independent specialist in the relevant field — that the treating physician's decision was not medically justified. An internal insurance company examiner's opinion alone carries limited weight against a treating specialist's clinical judgment.
• Address the treating physician's clinical notes and discharge summary specifically. A blanket assertion of “not medically necessary” without engaging with the clinical evidence is not a sufficient basis for rejection.

In your appeal, obtain a certificate from the treating physician explaining the clinical necessity of the hospitalisation and addressing the specific objection raised by the insurer. If the insurer's rejection is based on a rule-of-thumb (e.g., certain procedures are “day care” and do not require overnight hospitalisation), and your clinical situation required overnight care, the treating physician's explanation of why the standard protocol did not apply is the key document.

Non-network hospital rejections

If you were treated at a hospital not on the insurer's network, the claim may be settled on a reimbursement basis with certain deductions — but it cannot be rejected outright in several common situations:

• Genuine medical emergency: IRDAI mandates that genuine emergencies at non-network hospitals must be covered. The insurer cannot apply additional co-payment or sub-limits beyond those in the policy for emergency treatment.
• No network hospital accessible:If the insurer's network had no empanelled hospital within a reasonable distance of where the emergency occurred, a full rejection on network grounds is difficult to sustain.
• Post-emergency follow-up: If the patient was stabilised at a non-network hospital and transferred to a network hospital as soon as clinically possible, the non-network costs for the emergency phase are claimable.

Waiting period and exclusion disputes

Rejections citing a waiting period (typically 2–4 years for specific conditions, 30 days for illnesses, immediate for accidents) must be verified against the actual policy schedule and the actual date of the policy. Calculate the waiting period independently — errors in the insurer's calculation are not uncommon, particularly for policies that have been ported from another insurer.

Under IRDAI portability rules, waiting period credits from the previous policy must be carried forward. If your policy was ported and the insurer is applying a fresh waiting period, that is contrary to portability regulations.

Sub-limit disputes

Many health policies contain sub-limits on room rent, ICU charges, and specific procedures. If a sub-limit is being applied to reduce your claim, verify:

• That the sub-limit is clearly stated in the policy schedule, not buried in fine print that was not disclosed at the time of purchase
• That the proportionate deduction methodology (if applied) is correctly calculated — some insurers apply disproportionate reductions when room rent exceeds the sub-limit
• That the sub-limit is being applied to the correct component of the bill — sub-limits cannot be used to reduce charges that are not covered by the sub-limit clause

How to appeal

1. Write to the Grievance Redressal Officerciting the specific violation: procedural (no deficiency notice, 30-day breach) or substantive (medical necessity, network, waiting period). Attach the treating physician's certificate and a complete document submission log.
2. File on IRDAI IGMS simultaneously.
3. If unresolved in 30 days, file with the Insurance Ombudsman. Reimbursement claim disputes are among the most commonly heard cases, and procedural violations — particularly the failure to issue a deficiency notice — are consistently treated seriously.