A total of 1461 patients were included in the study. The prevalence of diabetes was 20.6%; 178 patients (59.1%) had diagnosed diabetes, and 123 patients (40.9%) had undiagnosed diabetes. Prediabetes was identified in 559 patients (38.3%), resulting in a combined total of 860 (58.9%) patients with diabetes and prediabetes. Total diabetic rates were significantly higher in patients aged >65 years, of nonwhite ethnicity, and undergoing total knee arthroplasty. No significant differences in periprosthetic joint infection and wound complications were observed while comparing patients with diagnosed and undiagnosed diabetes.