A pre-existing disease is any condition diagnosed or treated within 48 months before buying a health insurance policy.
Medical history is the complete record of all your past health conditions — including those beyond the 48-month window.
The key difference: only pre-existing diseases trigger waiting periods and affect your premiums directly.
Imagine this - you’ve finally decided which health insurance plan to buy and which insurance company to buy from. Now, one of the next things you’ll need to do is fill out the proposal form. This can be rather challenging - especially if you don’t have anyone on your side to help you out.
When you start filling out the proposal form, you’ll come across several fields - first, you’ll have to provide basic, personal details. Then, as you go ahead, you’re asked to provide medical details - that is, details about your medical history and pre-existing diseases. And, you start to wonder - what exactly is a pre-existing disease? How is it different from medical history? And, is it really important to provide details about your medical history and pre-existing diseases to the insurer? If yes, why?
In this article, we answer these and a lot more questions. So, let’s begin!
What Is A Pre-Existing Disease?
The IRDAI defines a pre-existing disease as any condition, ailment, injury, or disease that is diagnosed by a physician within 48 months prior to the effective date of the policy or for which medical advice or treatment was recommended or received.
Note: Under IRDAI regulations, treatment related to a pre-existing disease becomes eligible for coverage once the applicable waiting period is completed, provided the condition was disclosed at the time of purchasing the policy and the policy has been renewed continuously without breaks.
IRDAI has also introduced a moratorium period of five years for health insurance policies. After a policy has been continuously active for this period, insurers generally cannot reject claims on the basis of non-disclosure of pre-existing diseases unless there is proven fraud or permanent exclusions in the policy.
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What Is A Medical History?
Medical history refers to the complete record of your past and present health conditions, treatments, surgeries, medications, and hospitalisations. Insurers may review your entire medical history when assessing your application. However, under IRDAI guidelines, only conditions diagnosed or treated within the previous 48 months are classified as pre-existing diseases.
So, basically, medical history includes every little detail of any condition, disease, surgery, or injury you've ever experienced in the past, even the ones you had when you were a child.
Insurers may request for medical history in the proposal form to evaluate your case for health insurance.
Pre-Existing Disease Vs. Medical History - What’s The Difference?
The main difference between a pre-existing disease and medical history is -
| Pre-Existing Disease |
Medical History |
| The maximum waiting period for pre-existing diseases has been reduced to 36 months (3 years), although some insurers may offer shorter waiting periods depending on the policy. |
Conditions disclosed in your medical history may not always be classified as pre-existing diseases. However, insurers may still apply specific waiting periods, exclusions, or underwriting conditions depending on the policy terms and the medical assessment carried out during underwriting. |
Let’s understand this better with the help of Jay and Tara’s example.
Jay has been taking oral medications for hypertension for the past two years. He applies for a health insurance plan, where the insurer asks him to make declarations about the first diagnosis of hypertension, medicines taken, duration of treatment, etc. He is also asked to undergo some medical tests. Based on the test results and declarations made by Jay, the insurer applies a waiting period of 2 years for ‘hypertension and related conditions’. So, this means that the insurer will not cover any treatment or hospitalisation costs associated with hypertension or related conditions for 2 years under the policy.
Tara had cancer in her childhood (15 years back), which is now cured. She has not undergone any treatment related to cancer in the last 48 months. She, too, is looking to buy a health insurance plan. In this case, she’ll have to mention ‘cancer’ as part of her medical history. If Tara has not received treatment or medical advice for cancer in the last 48 months, it may not be classified as a pre-existing disease under IRDAI guidelines. However, insurers may still review her medical history during underwriting before issuing the policy and decide the applicable policy terms.
How Does The Insurer Use Details About Your Medical History Or Pre-Existing Diseases?
Insurers think twice before offering health insurance to someone with a pre-existing condition or medical history. Wondering why?
Insurers determine your insurability and health insurance premiums on the basis of your medical history including pre-existing diseases. Typically, if you are young and healthy or lead a moderately active lifestyle, and don’t suffer from any ailments or medical conditions, insurers determine policy premiums and terms based on several factors, including age, medical history, lifestyle, and the sum insured chosen by the applicant. However, if you suffer from a pre-existing disease or have a medical history, the likelihood of you requiring a hospitalisation rises. So, they will decide whether to offer you the standard deal or not, depending on the medical details you provide.
Hence, it is important that you provide accurate and truthful declarations related to your medical history as well as pre-existing diseases. Based on the declarations you make, the insurance company will assess your health status and evaluate the risk you carry.
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Why Should You Make Accurate Declarations To The Insurer?
Insurance is a contract of utmost good faith - so, it is your responsibility to provide complete and honest medical declarations in the proposal form. If you hide or provide incomplete or inaccurate details - and the insurer finds out about it later, they can refuse to pay your claim, or even cancel your policy altogether. In order to avoid these hassles, make sure you make honest and accurate declarations to the insurance company
So, that is all from our side today. We hope you now know what a pre-existing disease and medical history are, how they differ from each other, and why it is important to make complete and accurate declarations in the proposal form.
Disclaimer:The information provided on this platform is intended for general awareness and educational purposes. While every effort is made to ensure accuracy, some details may change with policy updates, regulatory revisions, or insurer-specific modifications. Readers should verify current terms and conditions directly with relevant insurers or through professional consultation before making any decision.
All views and analyses presented are based on publicly available data, internal research, and other sources considered reliable at the time of writing. These do not constitute professional advice, recommendations, or guarantees of any product’s performance. Readers are encouraged to assess the information independently and seek qualified guidance suited to their individual requirements. Customers are advised to review official sales brochures, policy documents, and disclosures before proceeding with any purchase or commitment.
FAQs
Your general medical history includes all past illnesses, treatments, surgeries, and diagnoses throughout your life. A pre-existing disease (PED) is an insurance classification defined by the Insurance Regulatory and Development Authority of India. It refers to any condition diagnosed or treated, or for which medical advice or medication was received within 36 months before the start of the policy.
Not necessarily. A disease is usually classified as pre-existing if it was diagnosed or treated within the 36 months before the policy start date, as defined under regulations of the Insurance Regulatory and Development Authority of India.
If you have had no treatment, medication, or medical advice related to the illness in the last three years, it may not fall under the PED definition. However, you must still disclose the illness in your proposal form for proper underwriting.
Since hypertension was diagnosed within the last three years, it will typically be treated as a pre-existing disease. The insurer may request medical tests and apply a waiting period for hypertension-related claims. As per regulations issued by the Insurance Regulatory and Development Authority of India, the maximum waiting period for pre-existing diseases is capped at three years if the policy is renewed continuously.
Yes, if the condition is declared when you purchase the policy, it can be covered after the waiting period mentioned in the policy. Under rules set by the Insurance Regulatory and Development Authority of India, the waiting period for pre-existing diseases cannot exceed three years. After this period and with uninterrupted renewal, treatment related to the disease can be claimed.
Not disclosing a relevant health condition can lead to serious consequences. The insurer may reject related claims or cancel the policy if non-disclosure is discovered during claim review.
The Insurance Regulatory and Development Authority of India requires policyholders to provide accurate medical information during the proposal stage.
Health insurance policies follow a five-year moratorium period under rules issued by the Insurance Regulatory and Development Authority of India. If your policy has been continuously active for five years, insurers generally cannot reject claims due to non-disclosure or misrepresentation related to pre-existing diseases, except in cases where fraud is proven.
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