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NullFlavor
Lvl Type, Domain name and/or Mnemonic code Concept ID Mnemonic Print Name Definition/Description
1 S: NoInformation (NI) 10610 NI NoInformation No information whatsoever can be inferred from this exceptional value. This is the most general exceptional value. It is also the default exceptional value.
2   L:  (ASKU) 10614 ASKU asked but unknown Information was sought but not found (e.g., patient was asked but didn't know)
2   L:  (NA) 10611 NA not applicable No proper value is applicable in this context (e.g., last menstrual period for a male.)
2   L:  (NASK) 10613 NASK not asked This information has not been sought (e.g., patient was not asked)
2   L:  (NAV) 10615 NAV temporarily unavailable Information is not available at this time but it is expected that it will be available later.
2   L:  (NINF) 10618 NINF negative infinity Negative infinity of numbers.
2   L:  (NP) 10619 NP not present Value is not present in a message. This is only defined in messages, never in application data! All values not present in the message must be replaced by the applicable default, or no-information (NI) as the default of all defaults.
2   L:  (OTH) 10616 OTH other The actual value is not an element in the value domain of a variable. (e.g., concept not provided by required code system.)
2   L:  (PINF) 10617 PINF positive infinity Positive infinity of numbers.
2   L:  (UNK) 10612 UNK unknown A proper value is applicable, but not known.

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