Eligibility of Patients Referred to Emergency Departments by Their General Practitioners for Care in Walk-in Clinics: A Single-Center Study in Île-de-France

Inclusion Criteria: * Age 18 years or older * Patient referred to the emergency department (ED) with a letter from a general practitioner (GP) * ED visit during the study hours (Monday to Friday, 9 a.m. to 8 p.m.) * Consultation in the selected adult emergency service * Medical or traumatic reason justifying the ED visit * Patient stable at arrival and during ED care Exclusion Criteria: * Patients under 18 years old (pediatric cases excluded) * No referral letter or proof of GP referral * ED visit outside study hours (weekends, nights) * Patients requiring intensive hospital care defined by: * Intravenous treatments (e.g., antibiotics, fluids) * Heavy imaging exams (CT scan, MRI) during the visit * Diagnoses with immediate life- or function-threatening conditions (e.g., myocardial infarction, stroke, severe infection) * Hospitalization decided during or after ED visit * Clinical instability at or during ED visit (abnormal vital signs, respiratory distress, etc.) * Patients referred for non-medical reasons (social issues, lack of medical follow-up)