Health Insurance Audience Briefs  ·  Open Enrollment shoppers by channel, scored for fit and measured weekly  ·  audience@semcasting.com

65 and over · ages 65+

Medigap Audiences

Medigap Open Enrollment6 months from age 65

. 4.8M people in the United States fit the Medigap profile at the Qualified tier, with 2.40× more high-fit people than the U.S. population baseline. At $1.50 to $3.00 CPM, these audiences are priced at approximately 50% or less of the market rate, with results reported every week.

Enrollment timing. The six-month Medigap Open Enrollment Period starts the first month a person is 65 or older and enrolled in Part B. Outside it, insurers in most states can deny coverage or price on health.

~17MTotal addressable audience
3.5MHigh-Fit people
4.8MQualified reach
168.3Average index score
2.40×High-Fit lift index

Qualified audience

Every person is scored 0 to 100 for fit to this channel. You buy only the tiers that qualify.

$1.50 to $3.00 CPM

Priced at approximately 50% or less of the market rate for health insurance audiences.

Weekly measurement

Qualified reach, lift against the national panel, and reach by state, reported every week of the enrollment window.

Who this audience is

Adults 65 and over who stay on Original Medicare and buy a separate supplement policy to cover the deductibles, copays and coinsurance Medicare leaves behind. They pay a monthly premium for predictability, and they can use any doctor who takes Medicare. This is the affluent end of the Medicare market: people trading a known monthly cost for no surprise bills.

Why they are in market

There is a one-time six-month window when someone turns 65 during which an insurer cannot refuse them or price them on health status. Outside that window, in most states, they can be turned down. That makes newly-65 people the highest-value moment in this channel by a wide margin.

How big this audience is of 252M scored people

TierScoreShareU.S. reach
High-Fit85+1.4%3,505,248
Qualified75+1.9%4,809,201
Extended Reach65+2%5,141,172
Digitally active, qualified0.75%1,889,283

Qualified is the default buy. Digitally active is the qualified audience with average or higher digital engagement: 39% of it. Mean channel score across the panel: 62.2/100. Each person counts toward one channel only.

Age index vs. U.S. population

Affluence index vs. U.S. population

Budget
0
Middle
0
Affluent
954

100 = same share as the U.S. population. Teal is over-represented (130+), orange is under-represented (70 or below). The vertical line marks 100.

Reading the audience profile

The most sharply defined audience of the five, and by far the highest average index at 168.3. Almost entirely concentrated in the Affluent tier, which indexes at 954 once cross-channel overlap is removed, while Budget and Middle both drop to effectively zero. Ages 70 and over carry the channel. Everything about this audience points one direction: older and wealthier.

Top states qualified audience

  1. Florida 800K
  2. New York 790K
  3. New Hampshire 49K
  4. Hawaii 31K
  5. Rhode Island 29K
  6. District of Columbia 16K

By index against population, New York (314), New Hampshire (249), Florida (226), Hawaii (201) and Rhode Island (188) lead.

Where to reach them search and content themes

The language people use when they look for coverage information, for contextual and PMP targeting.

  • Medigap supplemental insurance plans
  • Medicare Supplement Plan G vs Plan N
  • Medigap open enrollment period
  • does Medigap cover what Medicare doesn't
  • best Medigap plan for seniors
  • Medigap premium comparison by state
  • guaranteed issue Medigap rights
Worth knowing. This is the smallest and most selective channel. Only 1.4% of people clear High-Fit, and the mean score of 62.2 is well below every other channel. That is the scoring doing its job, separating a narrow audience from the broad Medicare population. Expect higher CPMs and lower delivery ceilings, and plan flight length accordingly.

Common questions

Evidence base primary sources for Medigap

  • Public health researchSHADAC State Health Compare, Health Insurance Coverage Type by Total, 2024
  • Federal enrollment dataCMS Medicare enrollment reporting
  • Direct countSemcasting national person scoring, 251,722,617 records

How the audience is built

Each of 251.7M U.S. adults is scored 0 to 100 for fit to Medigap: a 40-point base, up to 25 points for age fit, up to 20 for household affluence fit, and up to 15 for state coverage context. Geography: Qualified means a score of 75 or higher with Medigap as the person's best-fit channel. High-Fit means 85 or higher.

How quality is confirmed

Reach figures are direct counts from the full national scoring, not extrapolations from a sample, and each person counts toward one channel only. During a campaign, the qualified share of households reached is measured every week against the national panel at the same score cutoffs.

What it is not

A marketing propensity score built from published, population-level Census, SHADAC and CMS data. It is not an insurance eligibility, subsidy or coverage determination for any person. No individual enrollment records, claims or PHI are used, and race is reported for parity checks only, never scored.