> Medicare is relatively simple compared to most insurance companies and their rules.
As someone who's actually had to deal with this complexity and implement software to facilitate it, I can assure you that Medicare is not at all simple, by any stretch of the imagination. It's not even standard or consistent within Medicare within a geographical region, even if you limit the scope to Part A and Part B, excluding coverage provided under Part C and Part D.
> Insurance companies, and employers, come up with byzantine rules for what's covered, when it's covered, where it's covered, who is allowed to provide care, prerequisites before approving coverage, what brand of products are permitted in treatment, and on and on.
This is exactly what Medicare itself does. The private insurers generally structure their terms in ways that are similar to what Medicare does. They're not identical, but it's not like Medicare is some haven of simplicity by itself that the private insurers complicate. Medicare itself is unbelievably complicated and abstruse by itself.
> There are entire industries dedicated to maintaining rules management engines specifically for validating policies, coverage, and claims.
Yes, that's true. And that would be true even if you only looked at Medicare patients.