42 C.F.R. § 447.52
(b) Maximum Allowable Cost Sharing.
(1) At State option, cost sharing imposed for any service (other than for drugs and non-emergency services furnished in an emergency department, as described in §§ 447.53 and 447.54 respectively) may be established at or below the amounts shown in the following table (except that the maximum allowable cost sharing for individuals with family income at or below 100 percent of the FPL shall be increased each year, beginning October 1, 2015, by the percentage increase in the medical care component of the CPI-U for the period of September to September of the preceding calendar year, rounded to the next higher 5-cent increment):
| Services | Maximum allowable cost sharing | ||
|---|---|---|---|
| Individuals with family income≤100% of the FPL | Individuals with family income101-150% of the FPL | Individuals with family income>150% of the FPL | |
| Outpatient Services (physician visit, physical therapy, etc.) | $4 | 10% of cost the agency pays | 20% of cost the agency pays. |
| Inpatient Stay | 75 | 10% of total cost the agency pays for the entire stay | 20% of total cost the agency pays for the entire stay. |
(d) Targeted cost sharing.
(e) Denial of service for nonpayment.
(1) The agency may permit a provider, including a pharmacy or hospital, to require an individual to pay cost sharing as a condition for receiving the item or service if—
(i) State Plan Specifications. For each cost sharing charge imposed under this part, the state plan must specify—
(4) The process used by the state to—