The purpose of this longitudinal observational study was to evaluate the effectiveness of a multidisciplinary inpatient treatment model for feeding disorders by analyzing long-term nutritional and health outcomes 12 months following discharge. Fifty patients completed the study. Average caloric intake by mouth as a percentage of goal for gastrostomy tube (GT)-dependent patients (n = 31) increased from pre-admit, week 1, and week 2 of the inpatient program (30%, 70%, and 84%, respectively), and was sustained from week 3 to 12-month follow-up (85% and 86%, respectively). Eighty-one percentage were discharged without GT support and 65% remained off GT support at 12 months. Oral supplement dependence for non-GT patients (n = 19) decreased from pre-admit, discharge, and 12-month follow-up (51%, 31%, and 19% of caloric intake, respectively). BMI z-scores improved during and after treatment. The present study demonstrated an effective approach for treatment of pediatric feeding disorders, including decreased reliance on oral supplementation and GT dependence.