16.1 Health Underwriting and Risk Selection

Underwriting is the process of evaluating, classifying, and pricing risk so that the rates an insurer charges fairly reflect the expected loss each applicant brings to the pool. The underwriter's central job is risk selection: deciding whether to accept an applicant, and if so, on what terms. Exam questions hinge on understanding that underwriting protects the insurer against adverse selection — the tendency of higher-risk individuals to seek insurance more aggressively than lower-risk individuals.

The Three Underwriting Decisions

After reviewing an application, the underwriter reaches one of three outcomes. Memorize these; the exam tests them directly.

Rating Substandard Risks

Substandard cases are not simply declined — most are accepted at a higher cost. Two methods exist:

• Rate-up / table rating: The applicant is moved to a higher age bracket or assigned a table (Table A–P), each table typically adding about 25% to the standard mortality assumption.
• Flat extra premium: A fixed dollar amount per $1,000 of coverage is added, often for a temporary, defined risk such as a hazardous occupation or recovery from a treatable condition.

Exam Tip: A flat extra premium can be temporary (e.g., $5 per $1,000 for five years after surgery) or permanent. Table ratings are generally permanent.

Factors Used in Health Risk Selection

Underwriters weigh both medical and non-medical factors. The most heavily tested are:

• Physical condition (morbidity): Current health, build (height/weight), blood pressure, and existing conditions.
• Medical history: Past illnesses, surgeries, and treatment patterns drawn from the application and the Attending Physician Statement (APS).
• Moral and morale hazards: A moral hazard is a tendency toward dishonesty (exaggerating a claim); a morale hazard is carelessness or indifference because insurance exists ("I'm covered, so why be cautious?"). Both increase expected loss beyond what the physical risk alone suggests.
• Occupation and avocation: Hazardous jobs (roofing, mining) or hobbies (scuba, aviation) raise morbidity and mortality.
• Financial status: For disability income, the insurer verifies earned income to prevent over-insurance that would discourage return to work.

Numeric Rating System

Large insurers use a numeric rating system to standardize substandard pricing. The standard risk is assigned a baseline of 100%. Debits (added percentages) are assigned for negative factors; credits (subtracted percentages) for positive ones.

Worked example. An applicant starts at 100. Obesity adds +50, controlled hypertension adds +25, and a favorable family history credits −15.

100 + 50 + 25 − 15 = 160

A total of 160 means 160% of standard mortality. Underwriting guidelines typically classify:

At 160, this applicant is rated substandard — accepted, but at an increased premium reflecting the extra 60% expected mortality.

Field Underwriting, Group vs. Individual Selection, and Rating Methods

Health risk selection happens at two levels. The producer performs field underwriting — completing an accurate application, arranging any exam, and screening for obvious uninsurability — while the home-office underwriter makes the final accept/rate/decline decision. On ACA-compliant individual and small-group medical plans, health-status underwriting is prohibited, so selection there is limited to lawful factors (age within 3:1 bands, geography, tobacco use, and family-vs-individual tier).

Group vs. individual risk control

Group plans deter adverse selection structurally: requiring, say, 75% participation and an actively-at-work provision keeps the healthy majority in the pool so one sick enrollee cannot skew the rate.

Rating methods

The exam distinguishes community rating (everyone in an area pays the same — ACA individual/small-group), modified community rating (allows age/geography/tobacco adjustments), and experience rating (a large group's own claim history sets its renewal). A group that runs 130% of expected claims sees an experience-rated increase, whereas a community-rated pool cannot single out that group — the same distinction tested for medical-expense basics, now applied to selection.

Adverse Selection and the Insurer's Defenses

Adverse selection occurs when those most likely to file claims are most likely to buy coverage. Insurers defend against it through:

• Underwriting questions and exams that surface hidden risk.
• Waiting/elimination periods so the insured cannot buy coverage the day before a known loss is paid.
• Pre-existing condition limitations (where still permitted) that exclude conditions present before coverage began.
• Probationary periods for certain illnesses (e.g., 30 days for sickness on some individual health policies).

Trap: The Affordable Care Act eliminated medical underwriting and pre-existing condition exclusions for ACA-compliant major medical plans. Pre-existing condition limitations still apply to products outside the ACA, such as some short-term, disability income, and long-term care policies.