The American Medical Association maintains an index of clinical tests and procedures: Current Procedural Terminology (CPT) codes. Study budgets may also include non-standard clinical tests and procedures, as well as activities, such as training, that do not have CPT codes because they are not clinical tests or procedures. Clinical Research Terminology (CRT) codes cover hundreds of investigative site activities without CPT codes, including routine, hidden and overhead costs. Sites can use CRT codes to (a) negotiate budgets with study sponsors, (b) identify invoiceable costs, (c) draft more detailed overhead justifications, and (d) better understand, track and control their costs. To read an article about Site Council CRT codes, click here. To access Site Council CRT codes, click here. To Access the SCRS Site Invoiceables Toolkit, click here.