Expected format is ##-#-##, where # represents a digit C indicates Central Lab R indicates Referral Lab U indicates Sponsor HL7 Gender Vocabulary Domain HL7 Race vocabulary domain N indicates Neither Limit Inclusive L indicates Lower Limit Inclusive U indicates Upper Limit Inclusive B indicates Both Limits Inclusive D indicates Days M indicates Months Y indicates Years D indicates Days M indicates Months Y indicates Years Code from standard dictionary e.g. SNOMED or ICD R indicates Reported C indicates Conventional S indicates SI L indicates Low Normal H indicates High Normal N indicates Normal B indicates Baseline C indicates Custom P indicates Prior D++ indicates Extraordinary Positive Change D+ indicates Positive Change D- indicates Negative Change D-- indicates Extraordinary Negative Change A indicates Absolute R indicates Relative + indicates Positive Change - indicates Negative Change LP indicates Low Panic LT indicates Low Telephone LN indicates Low Normal N indicates Normal HN indicates High Normal HT indicates High Telephone HP indicates High Panic AB indicates Abnormal EX indicates Exclusion HX indicates High Exclusion LX indicates Low Exclusion M indicates Remove I indicates Insert R indicates Retransmit U indicates Update