code |
name |
definition |
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. |
NA |
not
applicable |
No
proper value is applicable in this context (e.g., last
menstrual period for a male). |
UNK |
unknown |
A
proper value is applicable, but not known. |
NASK |
not
asked |
This
information has not been sought (e.g., patient was not
asked) |
ASKU |
asked
but unknown |
Information
was sought but not found (e.g., patient was asked but
didn't know) |
NAV |
temporarily
unavailable |
Information
is not available at this time but it is expected that it
will be available later. |
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). |
PINF |
positive
infinity |
Positive
infinity of numbers. |
NINF |
negative
infinity |
Negative
infinity of numbers. |
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. Its primary purpose is for those
circumstances where it is necessary to inform the
receiver that the information does exist. |
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. |