16.1 Health Underwriting and Risk Selection

Underwriting is the process by which an insurer evaluates an applicant's risk, decides whether to accept that risk, and sets the premium. The core purpose is risk selection and classification — grouping insureds so that each pays a premium proportional to the expected loss they bring to the pool. Done well, underwriting protects the insurer against adverse selection, the tendency of higher-risk people to seek (and over-purchase) coverage.

For health and life products the underwriter's central enemy is adverse selection; the central tool is information. The more accurately risk is measured, the more fairly the cost is spread across the risk pool.

Sources of Underwriting Information

Underwriters assemble a risk picture from several legally regulated sources. Each source has a specific role, and the exam tests which document does what.

The Medical Information Bureau (MIB) is a nonprofit member exchange. It stores coded impairment information, not full medical records, and an MIB finding may only be used to alert an underwriter to investigate further — it can never be the sole basis for declining coverage.

Selection and the Risk Pool

Every insured contributes premium based on expected loss, and the law of large numbers lets the insurer predict aggregate losses across a large pool even though any single loss is unpredictable. If underwriting were lax, low-risk applicants would subsidize high-risk ones, the low-risk insureds would leave, and the pool would deteriorate — the classic adverse-selection spiral. Sound classification keeps the pool stable and premiums fair, which is why exams stress that underwriting protects all policyholders, not just the insurer.

Field Underwriting Factors

The producer is the insurer's first set of eyes. Field underwriting weighs the standard risk factors the home office will later verify:

• Age and sex — mortality and morbidity rise with age; rates differ by sex.
• Build (height/weight) — significant overweight is a common rating reason.
• Tobacco/nicotine use — smokers pay materially higher premiums.
• Medical and family history — chronic disease and hereditary patterns.
• Occupation and avocation — hazardous jobs or hobbies (aviation, diving).
• Foreign travel and finances — exposure and insurable-interest support.

Risk Classifications

After gathering data, the underwriter assigns the applicant to a risk class that drives the premium:

• Preferred — better-than-average mortality/morbidity; lowest premium (ideal weight, non-smoker, clean history).
• Standard — average risk; the benchmark premium.
• Substandard (rated) — higher-than-average risk; premium is increased.
• Declined — risk is uninsurable at any premium the insurer offers.

Substandard cases are commonly handled with a table rating that adds a fixed percentage to the standard premium in 25% steps. The exam frequently tests these increments:

Worked example

A standard annual premium is $1,200. An applicant rated Table C pays the standard plus 75%: $1,200 x 1.75 = $2,100. A Table D applicant on the same base pays $1,200 x 2.00 = $2,400.

Instead of (or in addition to) a table rating, an insurer may attach a flat extra premium — a fixed dollar amount per $1,000 of coverage for a hazard such as aviation or a dangerous occupation. A flat extra can be temporary (e.g., for a transient medical condition) or permanent.

Flat extra worked example

Suppose an underwriter adds a flat extra of $5 per $1,000 to a $50,000 policy for a hazardous avocation. The added annual charge is 50 units x $5 = $250, layered on top of the base premium. Because the flat extra reflects a constant hazard rather than impaired mortality that worsens with age, it is frequently set as a level amount and may be removed if the hazard ends (e.g., the insured stops skydiving), which is a common exam distinction from a permanent table rating.

Underwriters also use exclusion riders to handle a specific impairment — the policy is issued at standard rates but excludes losses arising from the named condition or activity, an alternative to rating up the entire premium.

Field vs. Final Underwriting

The producer performs field underwriting — the first screening — by completing the application accurately, asking required questions, and avoiding adverse selection. The home-office underwriter performs final underwriting. A trap on the exam: the producer must record answers exactly as given and may not alter answers or fill in blanks, even to 'help' the applicant qualify.

Knowledge a producer gains during the application — such as an admitted condition the applicant later asks be left off — is generally imputed to the insurer because the producer is the company's agent at point of sale. This is why a producer who knowingly omits material information can expose the insurer to a claim it would otherwise have contested, and why honest, complete field underwriting is both an ethical and a contractual duty.