How Do Insurers Use Pre Existing Disease and Medical History?

As experts in the insurance industry with some honest perspective into the best health insurance plans and insurers, we often face queries like-

This is exactly why we always recommend buying health insurance when you’re younger and healthier.

If you apply after being diagnosed with a serious illness, you may face higher premiums, stricter conditions, or limited policy choices. In many cases, you’ll have to choose between paying more or compromising on coverage.

But what actually happens after you disclose your medical history and pre-existing diseases to the insurer? And how do insurers decide the premium you pay? Here’s a quick read on everything you need to know about it.

What is Pre-Existing Disease in Health Insurance?

For health insurance providers, a pre-existing disease is specifically those ailments that you have tested positive for and/or have been treated for within the last 48 months of applying for the policy.

What is Medical History in Health Insurance?

As per health insurers, any ailments that have affected you in the past (and you have been diagnosed with/taken medications for/undergone procedures, surgeries, hospitalisations for) are your medical history. This includes your pre-existing conditions and any other ailments dated before that.

How Does Pre-existing Diseases and Medical History Affect Health Insurance?

Say, you call up one of our expert advisors and tell them that you are looking for a health insurance plan. Among their queries regarding the kind of coverage you seek, the number of members you wish to cover, etc. they will also ask you -

“Sir/Ma’am, do you take any medications?” and “Were you ever hospitalised for any treatments/procedures?”

This question is specifically targeted to gauge the kind of ailments that you currently have or have had in the past. This transparency goes a long way. Here’s how such ailments can affect your health insurance policies -

• A Waiting Period On The Pre-Existing Conditions
  • For any pre-existing condition that you have, your health insurance policy will demand that you wait out a certain time (usually 2-4 years) for the health insurance coverage (for the pre-existing ailment) to kick in.
  • During this phase of the waiting period, if you are hospitalised due to any pre-existing condition or an auxiliary ailment, you will be paying the charges out of your pocket.
  • These waiting periods vary from one insurer to the other, and from one health insurance plan to the other.
• Options To Choose From Niche Health Insurance Plans
  • Not all health insurance policies are available for those with pre-existing conditions. On the other hand, some health insurance plans seem to be crafted exclusively for those with an extensive medical history of conditions like high blood pressure, asthma, etc.
  • Complete disclosure of your pre-existing medical conditions and health history will help the insurer (or us) to offer you suitable plans in which the premiums are comparatively lower and the waiting periods aren't too extensive.
  • A case in point is the HDFC Energy Silver plan which is perfect for those individuals with Diabetes and high BP since the plan covers these conditions from Day 1 (no waiting periods).
• A Prominent Spike In Premiums
  Usually, if you have a high BMI (which is considered a premonition to various health complications), or a pre-existing medical condition and yet your health insurer extends you a policy, it’s with a spiked premium. They add a certain loading charge on your base premium that would help them minimize their risks of financial vulnerability over frequent and substantial payouts.
• Permanent Exclusions On Pre-Existing Conditions (In Some Cases)
  Some health insurance providers put in a permanent exclusion on your pre-existing medical conditions and any other auxiliary ailments arising out of the condition. This means, your provider will cover all listed ailments, apart from the ones listed as your pre-existing conditions.
• Let’s take a plan in discussion to explain this better: Care Freedom Plan. This plan is one of the few policies in the market that extends its benefits to Cancer patients too. However, the patient has to have been in remission for 2 or more years and cancer is permanently excluded from its coverage profile. So, a policyholder (who has been in remission for 2 or more years) will be covered for everything apart from cancer and its auxiliary diseases.
• Mandatory copayments
  Since a potential policyholder with pre-existing conditions presents certain risks of frequent hospitalisations that insurers will be liable to cover, providers often demand certain mandatory copayments. This ensures that the payout risk is distributed between the insurer and the insured.
  However, copayments often tend to weigh on a policyholder’s wallet. So we recommend not to go ahead with plans that carry copayments as a mandatory feature unless you have no other options.
• Disease-wise sub-limits
  In the case of certain pre-existing medical conditions, even though the health insurer extends a policy, they put a cap on the maximum coverage amount for its treatment.

Say Amitesh has a heart condition and finally buys a health insurance policy. A few years later, he undergoes heart surgery costing ₹4 lakhs, but the insurer pays only ₹2 lakhs because his policy had a cap on pre-existing cardiac conditions.

This happens because insurers closely assess the likelihood of future claims before offering coverage. Since lifestyle conditions like diabetes, BP, and thyroid issues are now very common, insurers usually don’t reject everyone outright. Instead, they may impose compromises like higher premiums, disease-wise sub-limits, or mandatory copayments.

That’s why choosing the right policy often comes down to understanding and prioritizing these trade-offs carefully.

How Does the Health Insurance Provider Factor in Your Medical Condition?

• STEP 1: You apply for a health insurance plan
• STEP 2: You disclose your pre-existing conditions and medical history
• STEP 3: Your insurer requests all relevant medical records that back up your disclosure.
• STEP 4: The underwriting team of your health insurer scrutinises all the prescriptions and hospital procedure details.
• STEP 5: The underwriters analyse the prognosis of your ailment in terms of long-term medications and surgeries
• STEP 6: Underwriters base their data on their actuarial science and risk pooling
• STEP 7: The health insurance provider extends a counteroffer against your application that may include situations like -
  • Same policy with hiked premiums
  • Same policy with exclusions on your pre-existing ailments
  • A different policy with any or all of the previous terms and conditions mentioned above.

Why Choose Ditto for Health Insurance?

At Ditto, we’ve assisted over 8,00,000 customers with choosing the right insurance policy. Why customers like Pallavi below love us:

• No-Spam & No Salesmen
• Rated 4.9/5 on Google Reviews by 15,000+ happy customers
• Backed by Zerodha
• Dedicated Claim Support Team
• 100% Free Consultation

Confused about the right insurance? Speak to Ditto’s certified advisors for free, unbiased guidance. Book your call now or chat over WhatsApp, slots fill up fast!

Conclusion

People with pre-existing conditions can still get health insurance, but they may face longer waiting periods, higher premiums, permanent exclusions, or restrictive clauses like copayments and disease-wise sub-limits.

That’s why buying health insurance early, while you’re still young and healthy, is always better. But if you’re purchasing later, make sure to disclose all past and existing health conditions honestly. Hiding medical details can lead to claim rejection or even policy cancellation later.