Most diabetic applications that go badly go badly for a preventable reason: the applicant answered from memory, the record said something slightly different, and the underwriter now has a discrepancy to resolve rather than a file to price.
How carriers assess diabetes is covered on our diabetes and life insurance page. This is the mechanical companion to it — what to gather, in what order, and how to present a history that is not uniformly good.
Gather these four things first
Before you fill in anything, put together:
- Your last three A1c readings, with dates. Not the most recent one. Three, in order, so the trend is visible. This is the single most useful document you can bring.
- Your date of diagnosis, as accurately as you can establish it, and your age at the time.
- A current medication list with doses and start dates — metformin, sulfonylureas, DPP-4 inhibitors, SGLT2 inhibitors, GLP-1 agonists, insulin, anything else.
- Your most recent blood pressure, height, weight, and kidney function result if you have one. Diabetic underwriting is never only about glucose.
Your prescribing physician’s office can produce all of this in one request. Ask for it before you start an application rather than after a carrier asks for it, which costs weeks.
The five questions, and how to answer them
1. How long have you had it, and how old were you?
Age at diagnosis carries more weight than most applicants expect. A type 2 diagnosis at 55 and the same diagnosis at 28 describe very different exposure to complication risk over the remaining decades, and carriers price the difference. You cannot change the answer — but knowing it explains why quotes vary.
2. Type 1 or type 2?
Both are insurable. Type 2 is more straightforward, has a wider set of carriers writing it, and reaches better classes more often. Type 1 is a narrower market, and practitioners consistently report that late-onset type 1 with stable control is treated more favourably than childhood onset — largely because the years of accumulated exposure differ.
If you have type 1, the choice of carrier matters more than anything else on this list.
3. What do your A1c readings look like?
There is no published, industry-wide threshold. Every carrier sets its own bands in a manual it does not release, which is why any single number you find online should be treated as broker-reported rather than authoritative — the reasoning behind that is set out on our how underwriting works page.
What is consistent is that the pattern matters as much as the level. Three readings trending down is a materially different file from three readings trending up that happen to end on the same number.
4. How is it treated?
Roughly in ascending order of underwriting difficulty: diet and exercise alone, oral medication, oral medication plus insulin, insulin alone. Insulin narrows the carrier list rather than triggering an automatic rating — this is the area where the conventional wisdom is most out of date.
Give the dose and how long you have been on it. A stable dose for three years reads very differently from a dose that has been increased twice this year.
5. What else is going on?
Diabetes rarely arrives alone, and the co-morbidities often move the file further than the glucose does. Blood pressure, cholesterol, weight, kidney function, retinopathy, neuropathy, and smoking status are all in scope. A clean complication picture is worth more to your rate class than a modestly better A1c.
The mixed history problem
Almost nobody has a clean run. The realistic case is a few bad years followed by better ones, and how you present it changes the outcome.
Three things help:
- Lead with the sequence, not the average. Supply readings in date order. An underwriter who can see improvement without reconstructing it is an underwriter with less reason to be cautious.
- Explain the bad stretch factually and briefly. A medication change, a period of illness, a job that made routine impossible. One or two sentences, no defensiveness. Underwriters read a lot of files and are not looking for a story; they are looking for whether the bad period was caused by something that has since stopped.
- Do not omit the bad readings. Pharmacy and lab data will show them, and a gap between what you said and what the record contains is a worse problem than the readings ever were.
Which product to apply for
For a controlled type 2 file, simplified issue is usually the most predictable route: no blood draw, a short question set, and a decision in days.
Accelerated underwriting is worth trying and worth understanding. Some programs will take a well-managed diabetic file outright. Others accept the application, see the prescription record, and route it into full underwriting anyway. That is a delay, not a decline. Carriers also run random holdouts — deliberately sending a share of qualifying applications to full underwriting to audit the model — so being asked for an exam does not necessarily mean anything was found.
Guaranteed issue should be the last resort here, not the first stop. Diabetes on its own, insulin included, rarely justifies the pricing gap.
Disclose it, every time
Metformin, insulin and GLP-1 prescriptions all appear in the pharmacy database carriers check. The condition is visible by inference whether or not the application mentions it, and an omission discovered during the two-year contestability period can void the policy — the exact outcome the policy existed to prevent.
A disclosed, managed condition routinely prices better than an undisclosed one that surfaces mid-underwriting, because the second version raises a question about everything else on the form.
What to do next
Request your last three A1c readings and a current medication list from your physician’s office this week. Once you have them in front of you, the rest of the application is data entry — and you will be able to tell within a page or two whether the carrier you are applying to is one that writes files like yours.
If a previous application has already been declined or rated, read what to do after a decline before applying again. Reapplying to the same carrier with the same file is the most common wasted month in this category.