"We currently have relatively accurate information about the number of people receiving care in the specialist centres. The CSAPAs [National Treatment and Prevention Centre for Substance Abuse] are required to provide the administrative authorities with an annual activity report containing certain information about people received during the previous year (see Appendix IV-P). The response rate for these reports is close to 90% annually and almost 100% over a two-year period. Based on these reports, it is possible to estimate at approximately 96,000 the number of people who were seen in the outpatient CSAPA in 2008128 for their problem with illegal drugs. This includes overlapping, although these should not make up more than 5% of the total. Compared to the outpatient CSAPA, very few people, slightly fewer than 2,000, appear to be accommodated in a residential treatment centre, some of whom are already included in the figures for the outpatient CSAPA. In fact, these centres send a large number of patients to the residential centres where they are then housed. The number of people seen for a problem with illegal drugs in 2008 in prison CSAPAs can be estimated at 5,000.
"The only national data available for primary care is for people receiving substitution treatment. In 2010, as was previously mentioned, approximately 145,000 people were refunded by social security for their substitution treatment. Some of these may also have been monitored jointly or in succession by a CSAPA during the year.
"As regards hospitals, national data obtained from the PMSI medicalised information system programme are available 129 specifying the number of hospital admissions in the departments of medicine, surgery and obstetrics with a primary diagnosis of behavioural disorders related to the use of psychoactive substances, excluding alcohol and tobacco (ICD 10 diagnosis: F11 to F16, F18 and F19). There were approximately 7,500 hospital admissions in 2011, 1,900 of which concerned opiate users, almost 2,200 sedatives and hypnotics, around 1,000 cannabis users and 1,600 polydrug users. It should be noted that this data does not include attendance at emergency departments or those monitored on an outpatient basis for hospital addictions clinics. Overlapping also exists between hospitalised patients and those seen in specialist centres or primary care."

Source

l'Observatoire francais des drogues et des toxicomanies (OFDT), "2012 National Report (2011 data) to the EMCDDA by the Reitox National Focal Point: France: New Development, Trends and in-depth information on selected issues (Saint-Denis, France: OFDT, 2012), p. 81.
http://www.ofdt.fr/BDD/public…