Secretary. (H) Substantially all A financial requirement or treatment limitation applies to substantially all medical benefits in a classification if it applies to at least two-thirds of the benefits in that classification. (I) Treatment limitation (i) In general The term treatment limitation means mechanisms to control utilization of services and expenditures such as limits on the frequency of treatment, number of visits, days of coverage, or other similar limits on the scope or duration of treatment. Such term includes: (I) Quantitative treatment limitations Quantitative treatment limitations, including limits on the frequency of treatment, number of visits, days of coverage, or other similar limits on the scope or duration of treatment. (II) Nonquantitative treatment limitations Nonquantitative treatment limitations, including other limits on the access, scope, or duration of benefits for treatment under a plan or coverage not described in subclause (I), such as— (aa) medical management standards limiting or excluding benefits based on medical necessity or medical appropriateness, or based on whether the treatment is experimental or investigative