All new implanted cardioverter defibrillator (ICD) recipients in 2010 were assessed according to home DHB, ethnicity and socioeconomic status using the NZDep index. A total of 352 new ICDs were implanted nationwide during 2010, yielding an overall implantation rate of 80.6/million. There was substantial variance in implant rates across the 20 DHBs with the highest implant rate observed in Tairawhiti at 192.3/million, and the lowest at 22/million in the Nelson region. Implant rate also varied significantly by ethnicity, with Māori ethnicity at an implant rate of 114/million, European patients at 83/million, Pacific Island patients at 47/million and Asian patients at an implant rate of 32/million. Socioeconomic decile had no significant effect upon number of implants.