Medical underwriting is the process insurance companies use to evaluate your health when you apply for coverage. Based on that evaluation, the insurer decides whether to offer you a policy, how much to charge, and whether to exclude certain conditions. It’s most common in life insurance and was standard in health insurance before the Affordable Care Act largely eliminated it for those plans.
How Medical Underwriting Works
When you apply for a life insurance policy (or certain other types of coverage), the insurer wants to estimate how likely you are to file a claim. Medical underwriting is how they make that estimate. You’ll typically fill out a detailed application about your health history, current medications, family medical history, and lifestyle habits. Depending on the policy, you may also need a physical exam that includes blood and urine samples.
The underwriter then pulls information from outside sources to verify what you reported. These include prescription drug databases, motor vehicle records, credit reports, and a file maintained by the Medical Information Bureau (MIB). The MIB report can flag previous or existing medical conditions, hazardous hobbies, and adverse driving records. It does not, however, contain actual medical records like lab results, x-rays, or the reasons a prior insurer denied you coverage. Think of it as a summary of red flags rather than a complete medical file.
All of this information feeds into a risk profile. The underwriter compares your profile against the insurer’s guidelines and assigns you a rating class, which directly determines your premium.
What Factors Affect Your Rating
Underwriters look at a broad mix of health markers, lifestyle choices, and family history. The specific weight each factor carries varies by insurer, but the core inputs are consistent across the industry.
Body Weight and BMI
Your weight relative to your height is one of the most scrutinized factors. Research tracking healthcare costs over time found that severe obesity increases medical expenditures by roughly 27% for men and 47% for women compared to people at a normal weight. Those cost differences translate directly into how insurers price risk. Even moderate obesity nudges premiums higher, though the effect is more pronounced for women than for men.
Smoking and Tobacco Use
Smoking is one of the fastest ways to land in a higher-cost rating class. Current smokers incur about 14% to 19% higher healthcare costs than people who have never smoked, depending on sex. Former smokers fare better than current smokers but still cost more than those who never picked up the habit. Most insurers draw a hard line: if you’ve used tobacco in the past 12 months (some require 24 or 36 months), you’ll be rated as a smoker, which can double or even triple your premium compared to a nonsmoker classification.
Alcohol Use
Moderate drinking may not raise concerns, but frequent consumption does. Nearly daily alcohol use is associated with 21% higher healthcare costs for men and 32% higher costs for women compared to non-drinkers. Underwriters typically ask how many drinks you consume per week, and heavy use can result in a higher rating or even a decline.
Exercise and Physical Activity
Being physically active works modestly in your favor. Exercising one to four times per week is linked to roughly 7.5% lower healthcare costs compared to not exercising at all. While this factor alone won’t make or break your application, it contributes to the overall picture the underwriter is building.
Medical History and Family History
Chronic conditions like diabetes, heart disease, and cancer history are major factors. The underwriter will look at how well a condition is managed, how long ago a diagnosis occurred, and whether treatment is ongoing. Family history matters too: if a parent or sibling developed heart disease or cancer at a young age, that signals elevated genetic risk even if you’re currently healthy.
Rating Classes and What They Mean for Premiums
After reviewing your application, the underwriter places you into a rating class. While exact names vary by company, the tiers follow a consistent structure.
- Preferred Plus (or Super Preferred): Reserved for applicants in excellent health with no family history of heart disease or cancer. This is the lowest premium tier, and qualifying for it typically requires ideal lab results, a healthy BMI, no tobacco use, and no significant medical history.
- Preferred: Very good health with perhaps one minor concern, like mildly elevated cholesterol that’s well managed.
- Standard: Average health and normal life expectancy. You might have a concern around weight, or your family may have a history of heart disease or cancer. Premiums are higher than Preferred but still favorable compared to smoker rates.
- Substandard (or Table Rated): Used for complicated health histories or recent health events like a heart attack. Substandard ratings come in multiple grades, each adding a percentage surcharge to the Standard rate. This is the most expensive tier that still results in an approved policy.
The gap between these tiers is significant. A healthy 40-year-old rated Preferred Plus might pay half what someone in the Standard class pays for the same coverage amount, and a fraction of what a Substandard applicant would owe.
Policies That Skip Medical Underwriting
Not every policy requires a full medical review. Two alternatives exist for people who want coverage without the traditional process.
Simplified issue policies replace the full application with a short health questionnaire, typically five to fifteen questions about your medical history, medications, and lifestyle. The insurer may still check prescription drug databases and motor vehicle records, but there’s no physical exam. Coverage begins immediately with no waiting period, and the range of coverage amounts is broader than you might expect.
Guaranteed issue policies go a step further: no health questions at all. If you meet the age requirements, you’re approved. The tradeoff is substantial, though. Coverage amounts are limited, focused on funeral costs and small debts rather than income replacement. Most guaranteed issue policies also include a two-year waiting period. If the insured person dies within those first two years from a non-accidental cause, the beneficiary receives only a refund of premiums paid plus interest, not the full death benefit.
How Technology Is Changing the Process
The traditional underwriting process, with its blood draws, urine samples, and weeks of waiting, has been a major barrier to people actually buying life insurance. In response, the industry is shifting toward accelerated underwriting, which uses algorithms and external data to evaluate applicants in hours rather than weeks. Nearly 90% of life insurers are either using or planning to use automated underwriting techniques, according to the industry research group LIMRA.
Accelerated underwriting pulls data from credit reports, prescription drug histories, motor vehicle records, and the MIB, then runs it through predictive models to assess risk. If the algorithm determines you’re low-risk, you can be approved without a physical exam. If it flags concerns, you may still be routed to the traditional process. Regulators are watching this shift closely. The National Association of Insurance Commissioners has working groups examining how external data and artificial intelligence are being used, particularly around fairness and transparency.
Legal Protections to Know About
The Affordable Care Act banned medical underwriting for health insurance sold on the individual and small-group markets. Insurers cannot deny you health coverage, charge you more, or exclude conditions based on your medical history. This protection does not extend to life insurance, disability insurance, or long-term care insurance, where medical underwriting remains standard practice.
Genetic information occupies a complicated legal space. The Genetic Information Nondiscrimination Act (GINA), passed in 2008, prohibits health insurers and employers from discriminating based on genetic test results. But GINA covers only health insurance. Life, disability, and long-term care insurers are not restricted by federal law from using genetic information. States are left to set their own rules. Florida became the first state in 2020 to prohibit life, long-term care, and disability insurers from using genetic test results to set premiums or deny coverage, but most states have not followed suit. If you’ve had genetic testing done, the results could legally factor into a life insurance underwriting decision in most of the country.