In addition, lower tariffs are applied to days of care above and below standard duration thresholds within each DRG group. Tariffs also vary between public and non-profit and private hospitals, where physicians' fees are paid separately. In particular, the number of DRG groups increased from 700 in 2004 to about 2 300 in 2009, and duration thresholds have been regularly adjusted. For example, since 2010, some short stays are paid using a fixed fee and a daily tariff. Moreover, public hospitals have some leeway to adjust the amounts charged to complementary insurance plans and households, such as the per-diem tariffs (tarifs journaliers de prestation). Such differences blur the incentives of public payments and do not ensure equal treatment for patients.