Disease management is used to manage patients who have asthma and who are enrolled in a managed care health plan. To understand the effect of disease management on asthma severity and utilization, the investigators at Children's Mercy Hospitals and Clinics, will review data from a Medicaid Health Maintenance Organization (HMO) to determine the number of health plan members with different asthma severities and what their outcomes are. This will help us to improve the service provided to these patients. The investigators wish to publish this so that other health plans can benefit from the investigators experience.