Diagnostic criteria are a set of guidelines or criteria used to diagnose a specific medical condition or disorder. These criteria typically include a list of symptoms, physical findings, and other diagnostic indicators that must be present in order for a healthcare provider to make a diagnosis. Diagnostic criteria are often established by medical organizations or expert consensus panels, and are used to standardize the process of diagnosing different conditions and disorders. They help ensure that healthcare providers are all using the same criteria when making a diagnosis, which can help improve the consistency and accuracy of diagnoses.