Patient Classification Systems International
http://www.pcsinternational.org/ 

NHS England – Payment by Results
http://www.dh.gov.uk/PolicyAndGuidance/OrganisationPolicy/
FinanceAndPlanning/NHSFinancialReforms/fs/en

NHS Scotland – Scottish National Tariff Project
http://www.isdscotland.org/isd/collect2.jsp?pContentID=3553&p_applic=CCC&p_service=Content.show& 

USA Centre for Health Statistics
http://www.cdc.gov/nchs/

Australian National Data Dictionaries
http://www.aihw.gov.au/datadevelopment/data_standards/data_dictionaries.cfm

The Netherlands Casemix System (DBC)
http://www.dbconderhoud.nl/

German G-DRG Web Site
http://www.g-drg.de/

Canadian Institute for Health Information
http://www.cihi.ca/