Alternate Name	Item#	Length	Source of Standard	Column #
	367	1	NAACCR	435-435

Description
Code indicating basis of assignment of census tract for an individual record. Helpful in identifying cases tracted from incomplete information or P.O. Box. This item is not coded by the hospital. Central registry staff assign the code.

Codes

1	Census tract based on complete and valid street address of residence
2	Census tract based on residence ZIP + 4
3	Census tract based on residence ZIP + 2
4	Census tract based on residence ZIP code only
5	Census tract based on ZIP code of P.O. Box
6	Census tract/BNA based on residence city where city has only one census tract, or based on residence ZIP code where ZIP code has only one census tract
9	Not assigned, geocoding attempted
Blank	Not assigned, geocoding not attempted

Clarification of NPCR Required Status
Census-1990 data items:	Census-2000 data items:	Census-2010 data items:
Census Tract 1970/80/90 [110]	Census Tract 2000 [130]	Census Tract 2010 [135]
Census Tr Cert 1970/80/90 [364]	Census Tr Certainty 2000 [365]	Census Tr Certainty 2010 [367]
Census Tract Cod Sys--1970/80/90 [120]

Information on census tract and census tract certainty is required. Census Tract and Census Tract Certainty should be recorded in the year-appropriate data item fields in order to reflect demographic information at the time of diagnosis. Until the 2010 Census is completed and data are available for geocoding, tumors diagnosed in 2010 or later, should be coded to the 2000 census definitions and recorded in Census Tract 2000 [130] and Census Tr Certainty 2000 [365]. When the 2010 Census data are available for geocoding, tumors diagnosed in 2010 or later must be coded to the 2010 census tract definitions and recorded in Census Tract 2010 [135] and Census Tract Certainty 2010 [367]. For tumors diagnosed between January 1, 2008, and December 31, 2009, use of Census Tract 2010 [135] and Census Track Certainty 2010 [367] is recommended.