Concept Code	Concept Name	Preferred Concept Name	Code System
	A	Abnormal (applies to non-numeric results)	Abnormal	Abnormal flags (HL7)	Details
	>	Above absolute high-off instrument scale	Off scale high	Abnormal flags (HL7)	Details
	H	Above high normal	High	Abnormal flags (HL7)	Details
	HH	Above upper panic limits	Critically high	Abnormal flags (HL7)	Details
	AC	Anti-complementary substances present	Anti-complementary substances present	Abnormal flags (HL7)	Details
	<	Below absolute low-off instrument scale	Off scale low	Abnormal flags (HL7)	Details
	L	Below low normal	Low	Abnormal flags (HL7)	Details
	LL	Below lower panic limits	Critically low	Abnormal flags (HL7)	Details
	B	Better--use when direction not relevant	Better	Abnormal flags (HL7)	Details
	TOX	Cytotoxic substance present	Cytotoxic substance present	Abnormal flags (HL7)	Details
	DET	Detected	Detected	Abnormal flags (HL7)	Details
	HM	Hold for Medical Review	Hold for Medical Review	Abnormal flags (HL7)	Details
	IND	Indeterminate	Indeterminate	Abnormal flags (HL7)	Details
	IE	Insufficient evidence	Insufficient evidence	Abnormal flags (HL7)	Details
	I	Intermediate. Indicates for microbiology susceptibilities only.	Intermediate	Abnormal flags (HL7)	Details