Given no chance of "recovery" from the condition, there's no health interest to the subscriber, right?
There are probably scenarios where their best-case scenario is to say: "Oh well, I guess it was his time to go" and move on.
After all, the insurer has been harmed to the extent that between the actual demise of the insured and the statistically predicted time of death, they can no longer collect premiums and interest. And the insured has been harmed by being deprived of life during that same span.
But given that many doctors are covered by malpractice insurance from the same company or family of companies, that would be a case of taking from Peter to pay Paul. And it would probably line the pockets of lawyers and medical examiners to a greater extent than those who suffered the harm.
In any case, health insurance doesn't cover autopsy. Turns out its classified as postmortem to deny insurance coverage. there was an hour long special on NPR sometime in 2014.