[ASTM's diagnostic codes and test result coding/grading systems for clinical neurophysiology. See ASTM Specification E1467, Appendix 2. ( HL7V3.0 )] (UMLS (HL7) C1550185) =Intellectual Product =Code; CodeSystem
[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. ( HL7V3.0 )] (UMLS (HL7) C1555334) =Temporal Concept =ActPriority;