| Level | Code | Display | Definition | 
 | 1 | A | ASAP | As soon as possible, next highest priority after stat. 
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 | 1 | CR | callback results | Filler should contact the placer as soon as results are available, even for preliminary results.  (Was "C" in HL7 version 2.3's reporting priority.) 
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 | 1 | CS | callback for scheduling | Filler should contact the placer (or target) to schedule the service.  (Was "C" in HL7 version 2.3's TQ-priority component.) 
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 | 2 | CSP | callback placer for scheduling | Filler should contact the placer to schedule the service.  (Was "C" in HL7 version 2.3's TQ-priority component.) 
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 | 2 | CSR | contact recipient for scheduling | Filler should contact the service recipient (target) to schedule the service.  (Was "C" in HL7 version 2.3's TQ-priority component.) 
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 | 1 | EL | elective | Beneficial to the patient but not essential for survival. 
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 | 1 | EM | emergency | An unforeseen combination of circumstances or the resulting state that calls for immediate action. 
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 | 1 | P | preop | Used to indicate that a service is to be performed prior to a scheduled surgery.  When ordering a service and using the pre-op priority, a check is done to see the amount of time that must be allowed for performance of the service.  When the order is placed, a message can be generated indicating the time needed for the service so that it is not ordered in conflict with a scheduled operation. 
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 | 1 | PRN | as needed | An "as needed" order should be accompanied by a description of what constitutes a need. This description is represented by an observation service predicate as a precondition. 
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 | 1 | R | routine | Routine service, do at usual work hours. 
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 | 1 | RR | rush reporting | A report should be prepared and sent as quickly as possible. 
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 | 1 | S | stat | With highest priority (e.g., emergency). 
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 | 1 | T | timing critical | It is critical to come as close as possible to the requested time (e.g., for a through antimicrobial level). 
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 | 1 | UD | use as directed | Drug is to be used as directed by the prescriber. 
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 | 1 | UR | urgent | Calls for prompt action. 
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