Wastebasket diagnosis

A wastebasket diagnosis or trashcan diagnosis is a vague diagnosis given to a patient or to medical records department for essentially non-medical reasons. It may be given when the patient has an obvious but unidentifiable medical problem, when a doctor wants to reassure an anxious patient about the doctor's belief in the existence of reported symptoms, when a patient pressures a doctor for a label, or when a doctor wants to facilitate bureaucratic approval of treatment. It differs from a diagnosis of exclusion in that a wastebasket diagnosis is a diagnostic label of doubtful value, whereas a diagnosis of exclusion is characterized by the diagnosis being arrived at indirectly (through the process of excluding all other plausible causes). Unlike a vague wastebasket diagnosis, the diagnostic label arrived at through a process of exclusion may be precise, accurate, and helpful.

The term may also be used pejoratively to describe disputed medical conditions. In this sense, the term implies that the condition has not been properly classified. It can carry a connotation that the prognosis of individuals with the condition are more heterogeneous than would be associated with a more precisely defined clinical entry. As diagnostic tools improve, it is possible for these kinds of wastebasket diagnoses to be properly defined and reclassified as clinical diagnoses.

Wastebasket diagnoses are often made by medical specialists, and referred back to primary care physicians for long term management.