A life insurance blood test checks for chronic health conditions, substance use, and how well your organs are working, and the results place you into a rate class that sets your premium for the life of the policy. Insurers use the panel to estimate life expectancy, so the numbers on the page translate directly into what you pay. Knowing what the lab is looking at, and preparing for it, can be the difference between a preferred rate and a standard one.
What the Panel Screens For
The blood panel used in underwriting is broad. Each marker answers a different question about your long-term health.
Blood Sugar
Glucose measures your blood sugar at the moment of the draw. Hemoglobin A1c reflects your average blood sugar over the previous three months. An A1c below 5.7% is considered normal, 5.7% to 6.4% signals prediabetes, and 6.5% or higher indicates diabetes.1National Institute of Diabetes and Digestive and Kidney Diseases. The A1C Test and Diabetes Applicants with well-controlled Type 2 diabetes and an A1c consistently under 7% can often qualify for standard rates, and readings below 6% may earn better pricing.
Cholesterol
The lipid panel measures total cholesterol, LDL, HDL, and triglycerides. High LDL and triglycerides are linked to greater heart and blood vessel disease risk, while high HDL is protective.2Cleveland Clinic. Blood Tests to Determine Risk of Coronary Artery Disease Many insurers calculate a ratio by dividing total cholesterol by HDL. A ratio below 5.0 generally qualifies for the best rates, while a ratio between 5.0 and 6.5 lands in the standard range.
Liver Function
Two enzymes get the most attention: ALT and AST. Both are produced by liver cells, so elevated levels signal liver damage or disease.3National Library of Medicine. Elevated ALT and AST in an Asymptomatic Person Heavy drinking, hepatitis, and fatty liver disease all push these numbers up, and abnormal readings almost always trigger follow-up questions during underwriting.
Kidney Function
Kidney health is measured mainly through creatinine, a waste product from normal muscle activity. When kidneys aren’t filtering well, creatinine builds up in the blood. Insurers use your level to estimate glomerular filtration rate (GFR), which indicates how efficiently your kidneys clear waste each minute.4National Institutes of Health MedlinePlus. Glomerular Filtration Rate (GFR) Test Low GFR readings can point to chronic kidney disease, which significantly affects mortality risk.
Nicotine, Alcohol, and Drugs
This is where the biggest premium swings happen.
Nicotine
Smokers pay premiums averaging 146% higher than nonsmokers, so insurers test carefully. The blood test looks for cotinine, a byproduct your body creates after processing nicotine. Cotinine is more reliable than testing for nicotine itself because it stays in your system longer, remaining detectable for up to 10 days after your last exposure.5National Institutes of Health MedlinePlus. Nicotine and Cotinine A positive cotinine result classifies you as a smoker whether you smoke cigarettes, use nicotine patches, or vape occasionally. Some insurers make exceptions for applicants who exclusively use smokeless tobacco or e-cigarettes, but don’t count on it.
Alcohol
Moderate drinking won’t affect your rates. Heavy or chronic drinking will. Insurers look at gamma-glutamyl transferase (GGT) and carbohydrate-deficient transferrin (CDT), both of which rise with sustained heavy alcohol consumption.6National Library of Medicine. Biomarkers for Alcohol Use and Abuse: A Summary CDT is especially useful for detecting patterns of heavy drinking, roughly four or more drinks per day, and combined with GGT the tests catch about 90% of heavy drinkers. Elevated levels don’t automatically mean denial, but they’ll likely trigger deeper scrutiny and higher premiums.
Illicit Drugs and Cannabis
Standard panels screen for cocaine, opioids, amphetamines, and cannabis. A positive result for cocaine or other illegal drugs almost always results in an immediate denial. Prescription opioids are evaluated in context: with a legitimate prescription and documented medical need, the result alone won’t sink your application, though frequent use may prompt questions about your health history.
Cannabis sits in a gray area, and each insurer sets its own policy. Occasional users, typically defined as twice a month or fewer, can sometimes qualify for nonsmoker rates, particularly if they use edibles rather than smoking. Regular users are more likely to be classified as smokers. Lying about cannabis use is a bad gamble: the blood test will catch it, and the misrepresentation creates worse problems than the usage itself.
How to Prepare
Small choices in the days before the draw can make your numbers look meaningfully better or worse.
- Fast for 8 to 12 hours. Plain water only, no food, coffee, juice, or gum. Your insurer or the scheduling company will tell you the exact window.7National Institutes of Health MedlinePlus. Fasting for a Blood Test
- Skip intense exercise for 24 hours. Hard cardio can temporarily raise blood pressure, pulse, and cholesterol readings, and it may push urine protein high enough to trigger retesting.
- Avoid alcohol for at least 48 hours. Even moderate drinking in the days before can dehydrate you and spike liver enzyme levels.
- Watch for false-positive triggers. Poppy seeds can produce detectable morphine and codeine, even from a single muffin. NSAIDs like ibuprofen have been linked to false positives for cannabinoids and barbiturates in some studies. Skip both for a few days.8MDedge. What Common Substances Can Cause False Positives on Urine Screens for Drugs of Abuse
- Drink plenty of water. Staying hydrated makes the draw easier and helps ensure accurate readings.
Schedule the appointment for a morning slot if you can. Fasting overnight is easier than skipping meals during the day, and most people’s blood pressure runs lower in the morning.
What the Exam Looks Like
The life insurance company pays for the exam and sends a certified paramedical professional to your home or workplace at a time you choose. Some insurers also let you visit an exam center. The appointment typically takes 30 minutes to an hour and includes a blood draw, urine sample, blood pressure reading, and height and weight measurements. Older applicants and those seeking higher coverage amounts may also need an EKG.
The examiner will ask about your current health, medications, medical history, and lifestyle habits. Answer honestly. Insurers cross-reference your responses with prescription drug databases, your MIB file, and your medical records, and inconsistencies get flagged quickly. You’re entitled to a copy of the results after the exam. Underwriting typically takes a few weeks, though some accelerated programs return a decision in days.
How Results Shape Your Rate
Insurers sort applicants into rate classes based on the overall picture. Names vary by company, but the tiers generally look like this:
- Preferred Plus, sometimes called Super Preferred, delivers the best rates and is reserved for applicants with excellent blood work, no tobacco use, normal weight, and no significant medical history.
- Preferred still sits well below average pricing and allows for minor imperfections like slightly elevated cholesterol controlled with medication.
- Standard is the baseline rate for someone in average health, where most applicants with managed chronic conditions land.
- Substandard, or table rated, applies when health poses above-average risk. Each step adds roughly 25% to the standard premium: Table A costs 25% more, Table B costs 50% more, and so on.
A single abnormal reading usually won’t change your rate class by itself. Insurers look at medical records, prescription history, family history, and how any issues are being managed. Someone with borderline cholesterol who exercises regularly and takes a statin is a very different risk than someone with the same numbers who refuses treatment.
If You’re Declined
A denial based on blood work isn’t necessarily permanent. The insurer must tell you why, and you’re entitled to a copy of the results that drove the decision.
The most effective response is addressing whatever the test revealed. If your A1c was too high, work with your doctor to get it under control and reapply once you can show improvement. Insurers that see documented progress, like lower cholesterol, stable blood sugar, or a period of sobriety, are often willing to reconsider. There’s no fixed waiting period before you can reapply, but giving yourself six months to a year to build a track record makes a meaningful difference.
You can also try a different insurer. Underwriting guidelines vary significantly between companies, and a condition that one carrier declines could earn a standard or table-rated offer from another. Working with an independent agent who submits to multiple carriers is the fastest way to find out where you stand.
Honesty and the Contestability Period
Every life insurance policy includes a contestability period, typically two years from the issue date. During that window, the insurer can investigate a death claim and review whether the application contained inaccurate statements. If the company discovers you misrepresented your health, failed to disclose a known condition, or lied about substance use, it can reduce or deny the benefit entirely.
This is the real reason honesty during the blood test matters. If you quit smoking two weeks before the exam and the cotinine clears your system, but you were a pack-a-day smoker for twenty years, omitting that from the application creates a material misrepresentation. Should something happen within the first two years, your beneficiary could receive nothing. After the contestability period ends, the policy generally becomes incontestable, with one exception: outright fraud can still void coverage even after two years in most states.
Your Rights and Privacy Protections
No insurer can draw your blood without your written consent. Before the exam, you’ll sign an authorization form specifying which tests will be performed and how the results will be used. You have the right to receive a copy, and if the results lead to denial or higher rates, the insurer must explain why.
Genetic testing is an area where many people have a false sense of security. The Genetic Information Nondiscrimination Act (GINA) prohibits health insurers and employers from discriminating based on genetic test results, but its protections do not extend to life insurance, disability insurance, or long-term care insurance.9National Human Genome Research Institute. Genetic Discrimination10HHS.gov. Genetic Information Nondiscrimination Act (GINA) OHRP Guidance A life insurer can legally ask about genetic test results and use them in underwriting at the federal level. Roughly a dozen states restrict this to some degree, though the strength varies widely.11National Association of Insurance Commissioners. Genetic Testing for Insurance Coverage Model Law Chart If you’ve had genetic testing done, check your state’s insurance code before applying.
Most major life insurers participate in MIB (formerly the Medical Information Bureau), which collects coded information about medical conditions and hazardous activities. When you apply, MIB shares relevant records from previous applications with the new insurer, but only with your authorization.12Consumer Financial Protection Bureau. MIB, Inc. MIB is regulated under the Fair Credit Reporting Act, which gives you the right to request one free copy of your file every 12 months and to dispute inaccurate information. If a dispute is filed, MIB must investigate at no charge. Checking your file before applying is worth the effort, since an error in a previous insurer’s report could be quietly inflating your rates.
Alternatives That Skip the Blood Test
If a blood test is a dealbreaker, or if you know your health won’t survive traditional underwriting, other paths exist. Each involves trade-offs.
- Accelerated underwriting offers exam-free approval for healthy applicants, typically those under 60 seeking coverage up to $1 million to $3 million depending on the company. Instead of a blood draw, the insurer uses prescription drug databases, MIB records, driving history, and sometimes credit data. You’ll still answer health questions honestly, and the insurer can require an exam if anything raises a flag.
- Simplified issue policies skip the medical exam and rely on a short health questionnaire. Coverage amounts are usually lower and premiums higher than what clean blood work would earn through traditional underwriting.
- Guaranteed issue policies involve no exam, no health questions, and no possibility of denial. They’re designed for people who can’t qualify any other way. Coverage is typically capped at a small amount, premiums are the highest of any policy type, and most include a graded death benefit, meaning if you die within the first two to three years, your beneficiary receives only a return of premiums paid rather than the full face amount.
The trade-off is straightforward: the less health information you provide, the more the insurer charges to offset the unknown risk. For most healthy applicants, taking the blood test and earning a preferred rate class saves thousands of dollars over the life of the policy.