Obese patients are increasingly being offered weight loss surgery, the success of which depends in part on the quality of a long-term follow-up after the procedure. A study was conducted with a cohort of 207 patients operated on in 2007 and 2008 who received follow-up care in a specialized nutrition department, with the aim of identifying factors affecting their adherence to their post-operative care agenda. Factors strongly linked to a lower level of adherence were the type of surgery and a patient’s place of residence. These results enable us to discuss the importance of using care coordination to optimize post-operative monitoring.