The CMI value is used in determining the allocation of resources to care for and/or treat the patients in the group.
[1][2] Patients are classified into groups having the same condition (based on main and secondary diagnosis, procedures, age), complexity (comorbidity) and needs.
The adjusted average cost per patient would reflect the charges reported for the types of cases treated in that year.
If a hospital has a CMI greater than 1.00, their adjusted cost per patient or per day will be lower and conversely, if a hospital has a CMI less than 1.00, their adjusted cost will be higher.
As far as the Case Mix Index, the average is 1.37 with a minimum of .58 and a max of 3.73 and a standard deviation of 0.31.