Diseases coding systems

 ICD9 (Internantional Classification of Disease)

• Free online searchable 2003 ICD-9-CM and Medical Terminology Dictionary
• ICD 2000

 SNOMED

 ADICAP coding system in french by ADICAP

 disease ontology from the OBO consortium

References

 International Classification of Diseases for Oncology (ICD-O), Third Edition. A. Fritz (Editor), C. Percy (Editor), A. Jack (Editor), K. Shanmugaratnam (Editor), L. Sobin (Editor), D.M. Parkin (Editor), S. Whelan (Editor), D. M. Parkin, World Health Organization; (January 1, 2000) ISBN: 9241545348