Ideally, AUC are evidence-based, but in the absence of sufficient evidence, may be derived from a consensus of expert opinion.
In general, AUC are promulgated by medical specialty organizations (professional societies).
For example, a key issue is whether or not a procedure or investigation can be deemed appropriate if it does not result in a change in management.
[3] To reduce the cost of (advanced) diagnostic imaging tests, a requirement for the use of clinical decision support for was included in the Protecting Access to Medicare Act of 2014, though it does not apply to emergency or inpatient services.
[6] AUC may be promulgated in human-readable form, or converted into an electronic structured form for use in a clinical decision support system, such as a computerized physician order entry system.