Generated field that identifies which of the six NAACCR data exchange record types is being used in a file of data exchange records. A file should have records of only one type.

I	Incidence-only record type (nonconfidential coded data) Length = 4048
C	Confidential record type (incidence record plus confidential data) Length = 6154
A	Full case Abstract record type (incidence and confidential data plus text summaries; used for reporting to central registries) Length = 24194
U	Correction/ Update record type (short format record used to submit corrections to data already submitted) Length = 1543
M	Record Modified since previous submission to central registry (identical in format to the "A" record type; used to submit changes to data already submitted) Length = 24194
L	Pathology Laboratory