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NullFlavor     
Lvl Type, Domain name and/or Mnemonic code Concept ID Mnemonic Print Name Definition/Description
1 S: NoInformation (NI) S10610 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   S: Other (OTH) S10616 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).

3     L:  (NINF) C10618 NINF negative infinity

Negative infinity of numbers.

3     L:  (PINF) C10617 PINF positive infinity

Positive infinity of numbers.

2   S: Unknown (UNK) S10612 UNK unknown

A proper value is applicable, but not known.

3     S: AskedButUnknown (ASKU) S10614 ASKU asked but unknown

Information was sought but not found (e.g., patient was asked but didn't know)

4       L:  (NAV) C10615 NAV temporarily unavailable

Information is not available at this time but it is expected that it will be available later.

3     L:  (QS) C21436 QS Sufficient Quantity

The specific quantity is not known, but is known to be non-zero and is not specified because it makes up the bulk of the material.

'Add 10mg of ingredient X, 50mg of ingredient Y, and sufficient quantity of water to 100mL.' The null flavor would be used to express the quantity of water.

3     L:  (NASK) C10613 NASK not asked

This information has not been sought (e.g., patient was not asked)

3     L:  (TRC) C21386 TRC trace

The content is greater than zero, but too small to be quantified.

2   L:  (MSK) C17932 MSK masked

There is information on this item available but it has not been provided by the sender due to security, privacy or other reasons. There may be an alternate mechanism for gaining access to this information.

Note: using this null flavor does provide information that may be a breach of confidentiality, even though no detail data is provided. Its primary purpose is for those circumstances where it is necessary to inform the receiver that the information does exist without providing any detail.

2   L:  (NA) C10611 NA not applicable

Known to have no proper value (e.g., last menstrual period for a male).


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