Insurer says the hospitalisation was 'not medically necessary' — how do I answer that?
Written for policyholders in India · Last reviewed 2026-10-10
Answer it with clinical evidence rather than argument. Find how your policy defines medically necessary treatment, then show from the case papers, and ideally a letter from the treating doctor, why the admission and each treatment were needed at that level of care. If the letter instead says you were admitted only for investigation or evaluation, check whether treatment actually began during the stay.
When an insurer calls an admission 'not medically necessary', it is saying that the same care could have been given without admitting you, or that part of the stay or treatment went beyond what was needed. That is a clinical judgement, and it is answered with clinical records.
How a policy defines medically necessary
A health policy can limit what it pays to medically necessary expenses. One insurer's wording, for example, pays medically necessary expenses and defines medically necessary treatment as treatment, tests, medication or a hospital stay that meets four tests: it is required for the medical management of the illness or injury; it does not exceed the level of care needed for safe, adequate and appropriate care; it was prescribed by a medical practitioner; and it conforms to professional standards accepted in India or internationally.[1]
Find the same definition in your own policy. The insurer's letter should say which part it relies on; if it does not, ask, because a rejection must give details with reference to the specific policy terms.[2]
Match each test to evidence
| Part of the definition | What the insurer may be saying | Evidence that answers it |
|---|---|---|
| Required for medical management | The condition did not need hospital care | Admission notes, vital signs and test results on arrival, and the working diagnosis |
| Not beyond the level of care needed | You could have been treated as an outpatient, or discharged sooner | The treatment chart showing what was given and when, nursing notes, and the reason for each extra day |
| Prescribed by a practitioner | The admission was the patient's choice | The doctor's written advice to admit, with its date |
| Accepted professional standards | The treatment was unusual or unproven | The doctor's explanation, with reference to accepted guidelines |
If the letter says 'admitted only for investigation'
That is a different clause. One insurer's wording excludes an admission primarily for diagnostics and evaluation, and diagnostic expenses unrelated to the current diagnosis and treatment. If treatment such as intravenous medicines or a procedure was given, show it from the treatment chart: the question is what the admission was primarily for.[1]
What the treating doctor's letter should cover
- The condition on arrival: Symptoms, findings and test results that made admission necessary.
- Why outpatient care was not safe: Monitoring, intravenous treatment or procedures that needed a hospital setting.
- What was done and when: The treatment given each day, and why each day of the stay was needed.
- The diagnosis: With dates, consistent with the discharge summary.
For how to ask for such a letter and what makes it useful, see asking your doctor for a letter.
Once a claim is intimated, insurers and TPAs are required to collect the hospital's documents themselves, but keep your own copies of the case papers so that you can quote them. Under IRDAI's health master circular, the rejection also needs the approval of the insurer's Product Management Committee or its Claims Review Committee.[2]
Sources
The official documents this page relies on. Rules change: where it matters to your claim, check the current version at the source.
1. The New India Assurance Co. Ltd.
Arogya Sanjeevani Policy - Policy Clauses (UIN NIAHLIP25044V022425)Accessed 2026-10-09 · Cited at: New India Assurance, Arogya Sanjeevani Policy wording (UIN NIAHLIP25044V022425), clause 2 (Operative clause); New India Assurance, Arogya Sanjeevani Policy wording (UIN NIAHLIP25044V022425), definition 3.35; New India Assurance, Arogya Sanjeevani Policy wording (UIN NIAHLIP25044V022425), definition 3.35(b)-(c); New India Assurance, Arogya Sanjeevani Policy wording (UIN NIAHLIP25044V022425), definition 3.35(d); New India Assurance, Arogya Sanjeevani Policy wording (UIN NIAHLIP25044V022425), clause 7.1(a) (Code-Excl04); New India Assurance, Arogya Sanjeevani Policy wording (UIN NIAHLIP25044V022425), clause 7.1(b) (Code-Excl04)
2. IRDAI (verbatim copy hosted by the Institute of Actuaries of India)
Master Circular on Health Insurance Business, Ref IRDAI/HLT/CIR/PRO/84/5/2024 dated 29.05.2024 (17 pages, Version 1)Dated 2024-05-29 · Accessed 2026-10-09 · Cited at: IRDAI Master Circular on Health Insurance Business (IRDAI/HLT/CIR/PRO/84/5/2024, 29 May 2024), Chapter I, para 17(b); IRDAI Master Circular on Health Insurance Business (IRDAI/HLT/CIR/PRO/84/5/2024, 29 May 2024), Chapter I, para 17(c); IRDAI Master Circular on Health Insurance Business (IRDAI/HLT/CIR/PRO/84/5/2024, 29 May 2024), Chapter I, para 17(a)
Read from a copy hosted at actuariesindia.org · Official page
ClaimAssure is an independent private platform. It is not an insurer, IRDAI, Bima Bharosa or the Insurance Ombudsman, it never files anything on your behalf, and it cannot promise any outcome. What it does is read your documents and show you what they say.
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