Casemix was introduced in the late 1970’s in New Jersey in the USA, following the design and development of Diagnosis Related Groups (DRGs) by Yale University. The motivation for developing the DRGs was to create an effective framework for monitoring the quality of care and the utilization of services in hospitals. The New Jersey Department of Health initiated the use of DRGs to pay hospitals for each patient treated. In 1983 the American Congress amended the Social Security Act to include a national DRG based prospective payment system for all Medicare patients. Since then, Casemix has spread to every continent throughout the world. Although each country has a different version of Casemix, they are all built from the same foundations.
Casemix systems are used in different countries for a variety of purposes – clinical review, funding, monitoring, comparison, management, hospital planning and national planning. Internationally, Casemix is used for acute care, sub-acute, non-acute – everything from funding acute hospitals to evaluating nursing home care.
Around the world, hundreds of organisations, and thousands of clinicians, managers, statisticians and funders, all cooperate (in a way rarely seen in any other line of business), sharing data and ideas. Every year international conferences are held to seek peer review on ongoing developments. Specificially, the Patient Classification Systems International organisation host an international conference annually on Casemix related classifications systems.
The Irish Casemix Programme has particular strong links to with many other countries programmes. Click on the following to find out more about Casemix systems in other countries:
- German G-DRGs, INEK
- NHS England Payment by Results
- Information Centre NHS UK
- Dept of Health & Ageing, Australia
- Canadian Institute for Health Information
- American Health Care Association
- USA Centre for Health Statistics
- Norwegian Directorate of Health
- National Board of Health and Welfare Sweden
- The Netherlands Casemix System