Buy Medical Insurance with an Existing Illness: What Underwriting Typically Checks

If you have diabetes, thyroid issues, asthma, high blood pressure, a past surgery, or any long-term condition, you can still buy medical insurance in India. What changes is the way your application is assessed. Insurers do not guess. They rely on underwriting, a structured review that helps them assess your health risk and determine the terms of your cover.

This article explains what underwriting typically checks when you apply for a mediclaim policy with an existing illness, what documents may be asked for, and how to improve your chances of getting the right health insurance without unpleasant surprises later.

Why Underwriting Matters When You Have a Pre-Existing Illness

Underwriting is the insurer’s way of answering three simple questions.

What condition do you have, and how stable is it today?
How likely is it to need treatment or hospitalisation during the policy term?
What policy terms would keep the cover fair for you and sustainable for the insurer?

When you disclose a pre-existing condition, underwriting becomes more detailed. This is not to reject you by default, but to price and design cover responsibly.

Information Underwriters Usually Review

Underwriters focus on patterns, not one-off events. They try to understand diagnosis, treatment, control, and potential complications.

Your Disclosures in the Proposal Form

The proposal form is the starting point, and where many claim disputes begin. Underwriters check whether you have declared:

Existing diagnoses, symptoms, or ongoing investigations
Regular medicines and duration of use
Past hospitalisation, surgeries, or procedures
Any gaps in treatment or irregular follow-ups

Medical Records and Doctor Notes

If you mention an illness, underwriting may request supporting documentation. Typical documents include:

Consultation summaries and prescriptions
Lab reports and imaging results, if relevant
Discharge summaries from hospitalisation
A note from your treating doctor about stability and ongoing care

Current Control and Recent Health Markers

For chronic conditions, control matters. Underwriters often evaluate whether the condition is stable and whether it is being monitored. They may look for:

Whether readings are generally within the advised limits
Whether medicines have been consistent or frequently changing
Whether follow-ups are regular
Whether there are warning signs of complications

Pre-Policy Medical Tests

Depending on age, declared conditions, and the type of cover you choose, you may be asked to undergo medical tests.

Quick health checks confirm declared medical details
Helps spot hidden risks before approval
Results guide fair premiums and coverage terms
Makes future claims smoother and clearer

Past Policy History and Claim Behaviour

If you have had health insurance earlier, underwriting may review:

Continuity of cover, including gaps
Any past claims and their broad nature
Whether you are seeking portability, or what has been covered before

Lifestyle, Work, and Family Health History

Not every underwriting question is about diagnosis alone. They may also consider:

Smoking, alcohol intake, and tobacco use
Weight trends and activity levels, where relevant
Work-related risks such as frequent travel or high-stress roles
Family history of certain conditions

Possible Outcomes After Underwriting

After reviewing your details, insurers typically respond in one of a few ways.

Standard Acceptance

Some conditions, especially when stable and well managed, may be covered under standard terms. This is more common when the illness is mild, controlled, and backed by consistent medical records.

Acceptance with Modified Terms

If risk is higher or uncertain, the insurer may still offer health insurance, but with a change. The exact structure varies by product, so read the wording carefully before you accept.

Postponement or Decline

If a condition is newly diagnosed, unstable, under investigation, or associated with serious complications, underwriting may delay a decision or decline coverage. In many cases, you can reapply later with updated medical records showing stability.

How to Improve Your Chances of Getting the Right Cover

You do not need to game underwriting. You need to be prepared and transparent.

Disclose your condition in full, including medications and any past hospitalisations.
Share clear medical papers, especially recent prescriptions and test reports.
Avoid buying a plan based only on ads claiming instant approval
Compare policy wording, not just the premium, when choosing the best health insurance for your profile.
If you are older, focus specifically on health insurance for seniors, as underwriting rules and policy features can differ significantly.

Conclusion

Having an existing illness should not prevent you from getting the right health insurance. Underwriting helps insurers understand your condition, how well it is controlled, and which coverage terms are appropriate. Be honest in the proposal form, keep your medical records ready, and choose a mediclaim policy based on clarity, not just price. The right cover can still be within reach.

This post may contain affiliate links.

More Recommended Ebike/Scooters

Check out these other ebikes and scooters I've reviewed:

Urban Arrow Ebike – Last year, I made one of the largest purchases I’ve ever made – I bought a $9,000 electric cargo bike from Urban Arrow. In my Urban Arrow review, I will discuss what it is and why I decided to buy this bike, as well as discuss how impactful a bike like this can be on your journey to financial independence.
Troxus Explorer Step-Thru Ebike – The Troxus Explorer Step-Thru is a fat-tire ebike that I’ve had the pleasure of riding for a while now. It has amazing power, great looks, and awesome range. If you’re looking for a great fat-tire ebike that offers a lot for the price, the Troxus Explorer Step-Thru is definitely one for you to consider. Check out my Troxus Explorer Step-Thru Review.
Hovsco HovBeta Ebike – The HovBeta is a folding ebike with great specs and a lot of interesting features, and importantly, it’s sold at a good price point. I’ve had a blast commuting with it and using it to do deliveries with DoorDash, Uber Eats, and Grubhub. Check out my Hovsco HovBeta Ebike Review.
Vanpowers Manidae Ebike – The Vanpowers Manidae is a fat tire ebike that I’ve been riding as my primary winter commuting bike and have also been using it to do food delivery with apps like DoorDash, Uber Eats, and Grubhub. After clocking in a decent number of miles with this ebike, I wanted to write a post sharing what my experience with the Vanpowers Manidae ebike has been like. Check out my Vanpowers Manidae Review.
Sohamo S3 Step-Thru Folding EBike Review – A Great Value Folding Ebike – The Sohamo S3 Step-Thru Folding Ebike is an entry-level folding ebike that offers a lot of value for the price point. I’ve been riding the Sohamo S3 for a while now, putting the bike through its paces, and I have to say, this bike has exceeded all of my expectations. Check out my Sohamo Review.
KBO Flip Ebike – The KBO Flip is an excellent bike. I’ve had a great time riding it and think it’s a versatile bike that can be used for a lot of purposes and can fit a variety of lifestyles. It’s worked out great for me as a general commuter bike and as a food delivery bike. Check out my KBO Flip Review.
Hiboy P7 Commuter Ebike – The Hiboy P7 is an excellent electric commuter bike that’s offered at an affordable price point. The range and speed of this bike are both very good, so you won’t have any trouble getting anywhere you need to go with it. As a food delivery vehicle, this is also good – with how much range it offers, you’ll be able to work all day on a single charge. Check out my Hiboy P7 Commuter Electric Bike Review.
Himiway Escape Ebike – The Himiway Escape is an interesting bike for anyone looking for a moped-style ebike. If you’re a gig economy worker, the Himiway Escape is particularly interesting and it’s possible to think of it as an investment, especially if you can opt to do deliveries with the Himiway versus using a car. It’s not cheap, but you can definitely make your money back when you compare the mileage you’ll put on your car versus using an ebike. Check out my Himiway Escape Bike Review.
Espin Sport Ebike – The Espin Sport is a good ebike for someone who is looking for an ebike that feels and rides more like a regular bike. There are many ebikes that are really only bikes in name. In reality, they’re basically electric mopeds. The Espin Sport, by contrast, is a bike you could probably ride without the battery and you’d feel like you’re just riding a regular bike. Check out my Espin Sport Review.
Varla Eagle One Scooter – The Varla Eagle One is an excellent scooter that can make sense for a lot of people. It can work as a primary mode of transportation. You can use it to work on gig economy apps like DoorDash, Uber Eats, and Grubhub. And it can also be a recreational vehicle if you’d prefer to use it for that. Check out my Varla Eagle One Review.
Varla Falcon Scooter – The Varla Falcon is an excellent scooter that offers a good amount of power at a lower price point compared to more powerful scooters. It’s not exactly an entry-level scooter, nor is it a high-powered scooter. I think it fits somewhere in-between those two categories – an intermediate scooter if I had to give it a category. Check out my Varla Falcon Review.
Hiboy S2 Scooter – The Hiboy S2 is an excellent entry-level commuter scooter that's perfect for someone looking to save some money in transportation costs and improve their commute. Check out my Hiboy S2 Review.
Hiboy S2R Scooter – The Hiboy S2R is one of the more interesting electric scooters I’ve been able to test out. It’s not a high-powered scooter, but for an everyday transport option, it’s very useful, especially given some of the unique features that it has. Indeed, for the price, the Hiboy S2R might be the best value scooter I’ve used. Check out my Hiboy S2R Review.
Fucare H3 Scooter – The Fucare H3 is a fun scooter and I’ve enjoyed testing it out. For a daily commuter or quick trips or errands, the Fucare H3 is probably the scooter I’ll use. It’s portable and easy to maneuver, so it’s just easier to take on the road when I need it. Check out my Fucare H3 Scooter Review.

More Recommended Investing App Bonuses

For additional investing app bonuses, be sure to check out the ones below:

M1 Finance ($75) – This is a great robo-advisor that has no fees and allows you to create a customized portfolio based on your risk tolerance. You also get $75 for opening an account. Check out my M1 Finance Referral Bonus – Step-By-Step Guide.
SoFi Invest ($25) – SoFi Invest is an easy brokerage account bonus that you can earn with just a few minutes of work. Use my SoFi Invest referral link, fund your SoFi Invest brokerage account with just $10 and you’ll get $25 of free stock. I also have a step-by-step guide for the SoFi Invest referral bonus.
Robinhood (1 free stock) – Robinhood gives you a free stock valued between $2.50-$225 if you open an account using my referral link.
Public (1 free stock) - Public gives you a free stock valued between $3-$70 if you open an account using my referral link.

More Recommended Bank Account Bonuses

If you’re looking for more easy bank bonuses, check out the below options. These bonuses are all easy to earn and have no fees or minimum balance requirements to worry about.

Ally Bank ($100) – Of all the banks out there, Ally is, without a doubt, my favorite. At the moment, Ally is offering $100 to customers who open an eligible Ally account and meet the requirements. Here are the step-by-step directions to earn your Ally Bank referral bonus.
Chime ($100) - Chime is a free bank account that offers a referral bonus if you use a referral link and complete a direct deposit of $200 or more. In practice, any ACH transfer into this account triggers the bonus. This bonus is easy to earn and posts instantly, so you’ll know if you met the requirements as soon as you move money into the account. I wrote a step-by-step guide on how to earn your Chime referral bonus that I recommend you check out.
US Bank Business ($400/$1200) – This is a fairly easy bank bonus to earn, since there are no direct deposit requirements. In addition, you can open the Silver Business Checking account, which comes with no monthly fees. Check out how to earn this big bonus here.
Current ($50) – Current is a free fintech bank that’s offering new users a $50 referral bonus after signing up for an account using a referral link. Current is an easy bonus to earn and also gives you access to three savings accounts that pay you 4% interest on up to $2,000. That means you can put away up to $6,000 earning 4% interest. That’s very good and makes Current an account I recommend to everyone. Check out my step-by-step guide on how to earn your Current Bank bonus.
Novo Bank ($40) - Novo bank is a free business checking account that’s currently offering a $40 bonus if you open a Novo business checking account using a referral link. In addition to being a good bank bonus, Novo is also a good business checking account. It has no monthly fees or minimum balance requirements and operates a good app and website. Indeed, it’s the business checking account I currently use for this blog. Check out my post on how to easily open a Novo account.
Varo ($25) – Varo is a free fintech banking app similar to Chime or Current. It’s currently offering a $25 bonus to new users that open a new Varo account with a referral link. The bonus for this bank is very easy to meet, all you need to do is spend $20 within 30 days of opening your Varo account. Check out my step-by-step guide to learn how to earn this bonus.

Kevin is an attorney and the blogger behind Financial Panther, a blog about personal finance, travel hacking, and side hustling using the gig economy. He paid off $87,000 worth of student loans in just 2.5 years by choosing not to live like a big shot lawyer.

Kevin is passionate about earning money using the gig economy and you can see all the ways he makes extra income every month in his side hustle reports.

Kevin is also big on using the latest fintech apps to improve his finances. Some of Kevin's favorite fintech apps include:

SoFi Money. A really good checking account with absolutely no fees. You'll get a $25 referral bonus if you open a SoFi Money account with a referral link, and an additional $300 if you complete a direct deposit.
5% Savings Accounts. I'm currently getting 5.24% interest on my savings through a company called Raisin. Opening a Raisin account takes minutes to complete, it's free, and all of your funds are FDIC-insured. I explain how it works, why I'm now using it to store my emergency fund and any other cash savings I have, and why I recommend everyone check it out in this review.
US Bank Business. US Bank is currently offering new business customers a $400/$1200 signup bonus after opening a new account and meeting certain requirements.
M1 Finance. This is a great robo-advisor that has no fees and allows you to create a customized portfolio based on your risk tolerance. You also get $75 for opening an account.
Empower. One of best free apps you can use to monitor your portfolio and track your net worth. This is one of the apps I use to track my financial accounts.

Feel free to send Kevin a message here.