Expanded Yes/no Indicator

Code System Description Comment Version
ASKU http://hl7.org/fhir/v3/NullFlavor asked but unknown Information was sought but not found (e.g. patient was asked but didn't know added v2.5
N http://hl7.org/fhir/v2/0136 No added v2.5
NA http://hl7.org/fhir/v3/NullFlavor not applicable No proper value is applicable in this context (e.g. last menstrual period for a male) added v2.5
NASK http://hl7.org/fhir/v3/NullFlavor not asked This information has not been sought (e.g. patient was not asked added v2.5
NAV http://hl7.org/fhir/v3/NullFlavor temporarily unavailable Information is not available at this time but it is expected that it will be available later added v2.5
NI http://hl7.org/fhir/v3/NullFlavor No Information No information whatsoever can be inferred from this exceptional value. This is the most general exceptional value. It is also the default exceptional value added v2.5
NP http://hl7.org/fhir/v3/NullFlavor not present Obsolete as of v 2.7. added v2.5
UNK http://hl7.org/fhir/v3/NullFlavor unknown A proper value is applicable, but not known added v2.5
Y http://hl7.org/fhir/v2/0136 Yes added v2.5