The CCDSS is a collaborative network of provincial and territorial chronic disease surveillance
systems, supported by the Public Health Agency of Canada. It identifies chronic disease cases
from provincial and territorial administrative health databases, including physician billing
claims and hospital discharge abstract records, linked to provincial and territorial health
insurance registry. Data on all residents who are eligible for provincial or territorial health
insurance (about 97% of the Canadian population) are captured in the health insurance
registry; thus, the CCDSS coverage is near-universal. Case definitions are applied to these
linked databases and data are then aggregated at the provincial and territorial level before
being submitted to the Public Health Agency of Canada for reporting at the provincial,
territorial and national levels. For information on the current scope of the CCDSS, refer
to Appendix A.