Diagnosis is the foundation of health care. It is the process of identifying and naming an illness, disease, injury, health condition, or other problem by examination of symptoms, physical signs, and test results. Patients seek care based on the assumption that providers can offer correct diagnoses, while treatment and prognosis are not possible without accuracy in its determination.The stigma of misdiagnosis pervades all aspects of health care as providers are expected to be infallible. Of course, humans are not. Misdiagnosis rates consistently run about 10-15% across most medical specialties, and provider over-confidence may be both the source and a barrier to reducing this rate.