Objectives: To describe the frequency and characteristics of complications of cochlear implant (CI) surgery at Edgardo Rebagliati Martins Hospital of social security in Lima-Peru between 2006 and 2015. Methods: A retrospective descriptive study of patients that underwent CI surgery between August 2006 and December 2015. Results: Among the 107 patients with CIs, the overall proportion of complications was 18.7% (20/107): 14.9% (16/107) of minor complications, and 3.7% (4/107) of major complications. Regarding the time of onset of complications, 2.8% (3/107) were intraoperative and 14% (15/107) postoperative. Conclusion: CI surgery in Peru is a safe procedure with a low frequency of major complications, representing an effective therapy for patients with sensorineural hearing loss who do not respond to hearing aids.