PCSI 2022 La 35e conférence de l’organisation internationale Patient Classification Systems International s’est tenue à Reykjavík (Islande) du 27 au 30 septembre. Programme de la 35e conférence PCSI Présentations proposées par l’ATIH : 1. New features for the French hospital Financial Incentive for Quality Improvement Program (IFAQ). 2. The extension of the hospital Financial Incentive for Quality Improvement program (IFAQ) to psychiatric hospitals in France. 3. Building a new classification for non‐ acute care. 4. How to switch a manual record collection with an automatic calculation from medico‐administrative databases for quality indicators? Example of the quality indicator « Care project, Life project » in rehabilitation care. 5. Optimising severity determination in the French DRGs with the exclusions mechanisms. 6. How to improve severity determination in the French DRGs. 7. Improving data quality by conducting systemic changes in the collection process: perspectives from the French Technical Agency for Information on Hospital Care.