208.453.  Hospitals to pay a federal reimbursement allowance for privilege of providing inpatient care, defined — elimination of allowance for certain hospitals. — Every hospital as defined by section 197.020, except any hospital operated by the department of health and senior services, shall, in addition to all other fees and taxes now required or paid, pay a federal reimbursement allowance for the privilege of engaging in the business of providing inpatient health care in this state.  For the purpose of this section, the phrase "engaging in the business of providing inpatient health care in this state" shall mean accepting payment for inpatient services rendered.  The federal reimbursement allowance to be paid by a hospital which has an unsponsored care ratio that exceeds sixty-five percent or hospitals owned or operated by the board of curators, as defined in chapter 172, may be eliminated by the director of the department of social services.  The unsponsored care ratio shall be calculated by the department of social services.