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This is a retrospective review of prospective multicenter cervical deformity (CD) database.Assess the impact of complication type and Clavien complication (Cc) grade on clinical outcomes of surgical CD patientsValidated for general surgery, the Clavien-Dindo complication classification system allows for broad comparison of postoperative complications; however, the applicability of this system is unclear in CD-specific populations.Surgical CD patients above 18 years with baseline and postoperative clinical data were included. Primary outcomes were complication type (renal, infection, cardiac, pulmonary, gastrointestinal, neurological, musculoskeletal, implant-related, radiographic, operative, wound) and Cc grade (I, II, III, IV, V). Secondary outcomes were estimated blood loss (EBL), length of stay (LOS), reoperation, and health-related quality of life (HRQL) score. The univariate analysis assessed the impact of complication type and Cc grade on improvement markers and 1-year postoperative HRQL outcomes.In total, 153 patients (61±10 y, 61% female) underwent surgery for CD (8.1±4.6 levels fused; surgical approach included 48% posterior, 18% anterior, 34% combined). Overall, 63% of patients suffered at least 1 complication. Complication breakdown by type: renal (2.0%), infection (5.2%), cardiac (7.2%), pulmonary (3.9%), gastrointestinal (2.0%), neurological (26.1%), musculoskeletal (0.0%), implant-related (3.9%), radiographic (16.3%), operative (7.8%), and wound (5.2%). Of complication types, only operative complications were associated with increased EBL (P=0.004), whereas renal, cardiac, pulmonary, gastrointestinal, neurological, radiographic, and wound infections were associated with increased LOS (P<0.050). Patients were also assessed by Cc grade: I (28%), II (14.3%), III (16.3%), IV (6.5%), and V (0.7%). Grades I and V were associated with increased EBL (both P<0.050); Cc grade V was the only complication not associated with increased LOS (P=0.610). Increasing complication severity was correlated with increased risk of reoperation (r=0.512; P<0.001), but not inferior 1-year HRQL outcomes (all P>0.05).Increasing complication severity, assessed by the Clavien-Dindo classification system, was not associated with increased EBL, inpatient LOS, or inferior 1-year postoperative HRQL outcomes. Only operative complications were associated with increased EBL. These results suggest a need for modification of the Clavien system to increase applicability and utility in CD-specific populations.