what is medical necessity
Medical necessity is a United States legal doctrine, related to activities which may be justified as reasonable, necessary, and/or appropriate, based on evidence-based clinical standards of care.Other countries may have medical doctrines or legal rules covering broadly similar grounds.y statute, Medicare may only pay for items and services that are reasonable and necessary for the diagnosis or treatment of illness or injury or to improve the functioning of a malformed body member, unless there is another statutory authorization for payment.