The director shall adopt and promulgate regulations establishing a schedule of maximum charges as deemed necessary for treatment or attendance, service, devices, apparatus or medicine provided by a health care provider. The rates in the schedules of maximum charges shall not fall below the sixtieth percentile or above the eightieth percentile of current rates for health care providers. In determining current rates for health care providers, the director shall utilize a variety of health care provider charges, including the charges of those providers serving low income, medicare and medicaid patients.