The objective of this study was to delineate a model for management of developmental dysplasia of the hip (DDH) treatment that incorporates hip ultrasound with objective/predicative parameters at key decision-making times. Hip sonograms of 74 infants (59 females, 15 males; 141 hips) with DDH were retrospectively reviewed. Hip sonographic score (HSS; ranges 0-10) was developed to reflect hip status based on sonographic position, stability, and morphology. Analysis on different management groups (i.e., no treatment, successful treatment, and failed treatment) showed that the trend of HSS is helpful in predicting course of the disease and determining effectiveness of treatment. A model for the management of DDH that utilizes an HSS and frequency schedule for hip sonography that is aligned with times of critical treatment decisions is proposed. This model illustrates how hip sonography can bring added value when timed to guide critical treatment decisions. (Journal of Surgical Orthopaedic Advances 32(1):047-054, 2023).