42 CFR 436.811 - Medically needy income standard: General requirements.
(a) To determine eligibility of medically needy individuals, the agency must use a single income standard for all covered medically needy groups that meets the requirements of this section.
(b) The income standard must take into account the number of persons in the assistance unit. The standard may not diminish by the number of persons in the unit (for example, if the income level in the standard for an assistance unit of two is set at $400, the income level in the standard for an assistance unit of three may not be less than $400).
(c) The income standard must be set at an amount that is no lower than the lowest income standard used on or after January 1, 1966, to determine eligibility under the cash assistance programs that are related to the State's covered medically needy group or groups of individuals under § 436.301.
(d) The income standard may vary based on the variations between shelter costs in urban areas and rural areas.