MCO stands for Managed Care Organization. MCO is a organization that provides medical services and health care. It is a group practice in which all expenses and income, as well as equipment and facilities <span>are shared. </span>Some of the areas that might be limited to patients under an MCO are : - where and how long a patient can stay in the hospital for a certain diagnosis - <span>Choice of physician - </span>the number and type of diagnostic tests <span>a physician can order</span><span> - </span>treatments a physician can order