Plenty of people assume a diagnosis means the answer is no, so they never apply. Most of the time they're wrong about that, and finding out costs nothing.
Here's how it actually works. Underwriters don't sort the world into insurable and not. They sort it into classes, and most health histories land in a class rather than a decline. A table rating means you're approved at a higher cost, priced for the extra risk, and coverage that costs more still does everything coverage does. Diabetes under control. A heart event years back. Anxiety medication. A cancer history past its window. All of these get offers every day.
Carriers also disagree with each other, a lot. Each company has conditions it prices aggressively and conditions it runs from, based on its own claims experience and appetite. The same file can draw a decline from one desk and a standard offer from another. This is the single best argument for working with a broker who can shop a case across carriers instead of a captive agent with one shelf to sell from. Better still, a broker can make an informal inquiry first. That shops your history without your name on it, before any application creates a record.
Be complete on the application. The insurer pulls your medical records anyway. And a policy is contestable for its first two years, which means the carrier can still go back and check. Something you got wrong can void the coverage your family was counting on. Awkward disclosure now beats a denied claim later, every single time.
The no-questions-asked policies advertised on TV pay limited benefits in the first years and cost far more per dollar of coverage. For a small final-expense need they're sometimes the only door, but check every other door first, because most people have more of them than they think.
For a cash value policy, a rating changes the design math. Higher insurance costs eat into what builds up. Sometimes the answer is adjusting the design. Sometimes it's building the plan around a healthier spouse instead, with more on that in The Case for a Policy on Both Spouses. Either way, start with the conversation, and the get started page shows what that looks like.