evaluation and management (E/M) codes

Five-digit procedural codes that appear in the Current Procedural Terminology (CPT) code book published annually and copyrighted by the American Medical Association (AMA). These codes describe the assessment and management of a patient’s medical care and are used for encounters by providers for billing services performed in the outpatient and inpatient settings (e.g., consultations, critical care visits, office visit, hospital visits, emergency department care). E/M codes begin with 99201 and end with 99499.

Evidence

Signs or indications that something is true or not true (e.g., physicians can use published studies as evidence that a treatment works or does not work).
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That which tends to prove or disprove any matter in question.