Medical necessity: is current documentation practice and payment denial limiting access to inpatient rehabilitation?

Medical necessity is a legal, not medical, term. Depending on the stakeholder's point of view, it may seem less about human need and dispensing medical care and more about a web of rules, rulings, regulations, and manuals, especially for Medicare patients, who use the lion's share of rehabilitation services. In other words, the term medical necessity seems, to some stakeholders, to refer more to what determines payment by Medicare instead of what should be done to determine optimal patient health.