Country code for the address of follow-up contact’s current usual residence. If the patient has multiple tumors, the country of follow-up contact residence should be the same for all tumors. This data item became part of the NAACCR transmission record effective with Volume II, Version 13 in order to include country and state for each geographic item and to use interoperable codes. It supplements the item FOLLOW UP CONTACT--STATE [1844].

Country of patient’s residence at follow-up is an important element of patient’s residential history profile and is useful for understanding risk factors, assessment of patient prognosis, and chances for survival.

Codes
Use the International Standards Organization (ISO) 3166-1 Country Three Character Codes, whenever possible, augmented by custom codes. See Appendix B for complete list of country names and corresponding three character alpha codes.