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To characterize the ocular inflammatory side effects associated with immune checkpoint inhibitor (CPI) treatment in a Northern California population. Retrospective case series. Patients receiving CPI within an integrated healthcare delivery system. All patients within Kaiser Permanente Northern California receiving CPI between January 1, 2012 and November 1, 2018 were identified. Medical records of those seen in the ophthalmology clinic at least once were retrospectively reviewed. Type and duration of ocular inflammation, indication for and exposure to CPI, time from exposure to diagnosis of ocular inflammation. 31 cases of ocular inflammation were identified in 5061 patients (0.61%) receiving CPI. Mean ± SD age was 67 ± 11.9 (range 38–89). Mean time from exposure to diagnosis was 6.8 ± 5.5 months (range 0.5–17). 87% of cases were bilateral, and 43% of cases were chronic. Average ophthalmology follow-up was 16 ± 18 months (range 0–71). 16/31 (52%) had anterior uveitis, 7/31 (23%) had serous retinal detachment or panuveitis resembling Vogt-Koyanagi-Harada syndrome, 4/31 (13%) had papillitis, and 6/31 (19%) had diplopia or ocular motility defect. There was one case each (3.2%) of melanoma associated retinopathy, corneal edema, granulomatous lacrimal gland enlargement, and choroidal neovascularization. Ocular inflammation is a rare immune associated side effect of CPI treatment, the most common manifestation of which is anterior uveitis. [ABSTRACT FROM AUTHOR]